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bernardo 5 年之前
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共有 9 個文件被更改,包括 1141 次插入0 次删除
  1. 20 0
      algoritmo_explic.html
  2. 4 0
      comandos_iVProg.html
  3. 7 0
      css/bootstrap.min.css
  4. 24 0
      css/w3-theme-teal.css_
  5. 235 0
      css/w3.css
  6. 348 0
      css/w3_original.css
  7. 316 0
      ex1_somatorio.html
  8. 185 0
      ex2_potencia.html
  9. 2 0
      js/jquery.min.js

+ 20 - 0
algoritmo_explic.html

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+  <body>
+
+
+    <h2>1 - O que é um algoritmo?</h2>
+    <p>
+      Um algoritmo é uma sequência de passos elementares, executados um após o outro seguindo o fluxo de execução (de cima para baixo)
+      Em geral, um <b>algoritmo</b> deve ser <b>aplicado</b> sobre um conjunto de <b>valores</b> para produzir um outro conjunto de <b>valores</b> como resposta.
+      Uma característica que um algoritmo deve apresentar é ser determinístico: sempre que este for aplicado sobre o mesmo conjunto de entradas
+      deverá produzir sempre a mesma saida
+    <br />
+      Nos exemplos utilizaremos quatro tipos de conceitos:
+    </p>
+    <ul>
+      <li>Variável: É utilizada para armazenar valores e resultados aritméticos;</li>
+      <li>Atribuição: Comando que permite modificar o valor de uma variável;</li>
+      <li>Seleção: Comando que permite desviar o fluxo de execução do seu algoritmo;</li>
+      <li>Laço de repetição: Comandos que permitem repetir um conjunto de comandos.</li>
+    </ul>
+  </body>
+</html>

+ 4 - 0
comandos_iVProg.html

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+<h2>2.3 - Comandos iVProg</h2>
+<p>
+  Para ler sobre os comandos do iVProg <a href="http://usp.br/line/ivprog/manual_pt/index.html">clique aqui</a>
+</p>

文件差異過大導致無法顯示
+ 7 - 0
css/bootstrap.min.css


+ 24 - 0
css/w3-theme-teal.css_

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+/* */
+
+.w3-theme-l5 {color:#000 !important; background-color:#e9fffd !important}
+.w3-theme-l4 {color:#000 !important; background-color:#b7fff8 !important}
+.w3-theme-l3 {color:#000 !important; background-color:#6efff1 !important}
+.w3-theme-l2 {color:#000 !important; background-color:#26ffe9 !important}
+.w3-theme-l1 {color:#fff !important; background-color:#00dcc6 !important}
+.w3-theme-d1 {color:#fff !important; background-color:#008578 !important}
+.w3-theme-d2 {color:#fff !important; background-color:#00766a !important}
+.w3-theme-d3 {color:#fff !important; background-color:#00685d !important}
+.w3-theme-d4 {color:#fff !important; background-color:#005950 !important}
+.w3-theme-d5 {color:#fff !important; background-color:#004a43 !important}
+
+.w3-theme-light {color:#000 !important; background-color:#e9fffd !important}
+.w3-theme-dark {color:#fff !important; background-color:#004a43 !important}
+.w3-theme-action {color:#fff !important; background-color:#004a43 !important}
+
+.w3-theme {color:#fff !important; background-color:#009688 !important}
+.w3-text-theme {color:#009688 !important}
+.w3-border-theme {border-color:#009688 !important}
+
+.w3-hover-theme:hover {color:#fff !important; background-color:#009688 !important}
+.w3-hover-text-theme:hover {color:#009688 !important}
+.w3-hover-border-theme:hover {border-color:#009688 !important}

+ 235 - 0
css/w3.css

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+/* W3.CSS 4.12 Novemberr 2018 by Jan Egil and Borge Refsnes */
+html{box-sizing:border-box}*,*:before,*:after{box-sizing:inherit}
+/* Extract from normalize.css by Nicolas Gallagher and Jonathan Neal git.io/normalize */
+html{-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%}body{margin:0}
+article,aside,details,figcaption,figure,footer,header,main,menu,nav,section,summary{display:block}
+audio,canvas,progress,video{display:inline-block}progress{vertical-align:baseline}
+audio:not([controls]){display:none;height:0}[hidden],template{display:none}
+a{background-color:transparent;-webkit-text-decoration-skip:objects}
+a:active,a:hover{outline-width:0}abbr[title]{border-bottom:none;text-decoration:underline;text-decoration:underline dotted}
+dfn{font-style:italic}mark{background:#ff0;color:#000}
+small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}
+sub{bottom:-0.25em}sup{top:-0.5em}figure{margin:1em 40px}img{border-style:none}svg:not(:root){overflow:hidden}
+code,kbd,pre,samp{font-family:monospace,monospace;font-size:1em}hr{box-sizing:content-box;height:0;overflow:visible}
+button,input,select,textarea{font:inherit;margin:0}optgroup{font-weight:bold}
+button,input{overflow:visible}button,select{text-transform:none}
+button,html [type=button],[type=reset],[type=submit]{-webkit-appearance:button}
+button::-moz-focus-inner, [type=button]::-moz-focus-inner, [type=reset]::-moz-focus-inner, [type=submit]::-moz-focus-inner{border-style:none;padding:0}
+button:-moz-focusring, [type=button]:-moz-focusring, [type=reset]:-moz-focusring, [type=submit]:-moz-focusring{outline:1px dotted ButtonText}
+fieldset{border:1px solid #c0c0c0;margin:0 2px;padding:.35em .625em .75em}
+legend{color:inherit;display:table;max-width:100%;padding:0;white-space:normal}textarea{overflow:auto}
+[type=checkbox],[type=radio]{padding:0}
+[type=number]::-webkit-inner-spin-button,[type=number]::-webkit-outer-spin-button{height:auto}
+[type=search]{-webkit-appearance:textfield;outline-offset:-2px}
+[type=search]::-webkit-search-cancel-button,[type=search]::-webkit-search-decoration{-webkit-appearance:none}
+::-webkit-input-placeholder{color:inherit;opacity:0.54}
+::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}
+
+/*html,body{font-family:Verdana,sans-serif;font-size:15px;line-height:1.5}html{overflow-x:hidden}*/
+h1{font-size:36px}h2{font-size:30px}h3{font-size:24px}h4{font-size:20px}h5{font-size:18px}h6{font-size:16px}.w3-serif{font-family:serif}
+h1,h2,h3,h4,h5,h6{font-family:"Segoe UI",Arial,sans-serif;font-weight:400;margin:10px 0}.w3-wide{letter-spacing:4px}
+hr{border:0;border-top:1px solid #eee;margin:20px 0}
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+.w3-hoverable tbody tr:hover,.w3-ul.w3-hoverable li:hover{background-color:#ccc}.w3-centered tr th,.w3-centered tr td{text-align:center}
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+.w3-ul{list-style-type:none;padding:0;margin:0}.w3-ul li{padding:8px 16px;border-bottom:1px solid #ddd}.w3-ul li:last-child{border-bottom:none}
+.w3-tooltip,.w3-display-container{position:relative}.w3-tooltip .w3-text{display:none}.w3-tooltip:hover .w3-text{display:inline-block}
+.w3-ripple:active{opacity:0.5}.w3-ripple{transition:opacity 0s}
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+.w3-main,#main{transition:margin-left .4s}
+.w3-modal{z-index:3;display:none;padding-top:100px;position:fixed;left:0;top:0;width:100%;height:100%;overflow:auto;background-color:rgb(0,0,0);background-color:rgba(0,0,0,0.4)}
+.w3-modal-content{margin:auto;background-color:#fff;position:relative;padding:0;outline:0;width:600px}
+.w3-bar{width:100%;overflow:hidden}.w3-center .w3-bar{display:inline-block;width:auto}
+.w3-bar .w3-bar-item{padding:8px 16px;float:left;width:auto;border:none;display:block;outline:0}
+.w3-bar .w3-dropdown-hover,.w3-bar .w3-dropdown-click{position:static;float:left}
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+.w3-container:after,.w3-container:before,.w3-panel:after,.w3-panel:before,.w3-row:after,.w3-row:before,.w3-row-padding:after,.w3-row-padding:before,
+.w3-cell-row:before,.w3-cell-row:after,.w3-clear:after,.w3-clear:before,.w3-bar:before,.w3-bar:after{content:"";display:table;clear:both}
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+@media (min-width:601px){.w3-col.m1{width:8.33333%}.w3-col.m2{width:16.66666%}.w3-col.m3,.w3-quarter{width:24.99999%}.w3-col.m4,.w3-third{width:33.33333%}
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+.w3-cell-row{display:table;width:100%}.w3-cell{display:table-cell}
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+
+.w3-amber,.w3-hover-amber:hover{color:#000!important;background-color:#ffc107!important}
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+.w3-blue,.w3-hover-blue:hover{color:#fff!important;background-color:#2196F3!important}
+.w3-light-blue,.w3-hover-light-blue:hover{color:#000!important;background-color:#87CEEB!important}
+.w3-brown,.w3-hover-brown:hover{color:#fff!important;background-color:#795548!important}
+.w3-cyan,.w3-hover-cyan:hover{color:#000!important;background-color:#00bcd4!important}
+.w3-blue-grey,.w3-hover-blue-grey:hover,.w3-blue-gray,.w3-hover-blue-gray:hover{color:#fff!important;background-color:#607d8b!important}
+.w3-green,.w3-hover-green:hover{color:#fff!important;background-color:#4CAF50!important}
+.w3-light-green,.w3-hover-light-green:hover{color:#000!important;background-color:#8bc34a!important}
+.w3-indigo,.w3-hover-indigo:hover{color:#fff!important;background-color:#3f51b5!important}
+.w3-khaki,.w3-hover-khaki:hover{color:#000!important;background-color:#f0e68c!important}
+.w3-lime,.w3-hover-lime:hover{color:#000!important;background-color:#cddc39!important}
+.w3-orange,.w3-hover-orange:hover{color:#000!important;background-color:#ff9800!important}
+.w3-deep-orange,.w3-hover-deep-orange:hover{color:#fff!important;background-color:#ff5722!important}
+.w3-pink,.w3-hover-pink:hover{color:#fff!important;background-color:#e91e63!important}
+.w3-purple,.w3-hover-purple:hover{color:#fff!important;background-color:#9c27b0!important}
+.w3-deep-purple,.w3-hover-deep-purple:hover{color:#fff!important;background-color:#673ab7!important}
+.w3-red,.w3-hover-red:hover{color:#fff!important;background-color:#f44336!important}
+.w3-sand,.w3-hover-sand:hover{color:#000!important;background-color:#fdf5e6!important}
+.w3-teal,.w3-hover-teal:hover{color:#fff!important;background-color:#009688!important}
+.w3-yellow,.w3-hover-yellow:hover{color:#000!important;background-color:#ffeb3b!important}
+.w3-white,.w3-hover-white:hover{color:#000!important;background-color:#fff!important}
+.w3-black,.w3-hover-black:hover{color:#fff!important;background-color:#000!important}
+.w3-grey,.w3-hover-grey:hover,.w3-gray,.w3-hover-gray:hover{color:#000!important;background-color:#9e9e9e!important}
+.w3-light-grey,.w3-hover-light-grey:hover,.w3-light-gray,.w3-hover-light-gray:hover{color:#000!important;background-color:#f1f1f1!important}
+.w3-dark-grey,.w3-hover-dark-grey:hover,.w3-dark-gray,.w3-hover-dark-gray:hover{color:#fff!important;background-color:#616161!important}
+.w3-pale-red,.w3-hover-pale-red:hover{color:#000!important;background-color:#ffdddd!important}
+.w3-pale-green,.w3-hover-pale-green:hover{color:#000!important;background-color:#ddffdd!important}
+.w3-pale-yellow,.w3-hover-pale-yellow:hover{color:#000!important;background-color:#ffffcc!important}
+.w3-pale-blue,.w3-hover-pale-blue:hover{color:#000!important;background-color:#ddffff!important}
+.w3-text-amber,.w3-hover-text-amber:hover{color:#ffc107!important}
+.w3-text-aqua,.w3-hover-text-aqua:hover{color:#00ffff!important}
+.w3-text-blue,.w3-hover-text-blue:hover{color:#2196F3!important}
+.w3-text-light-blue,.w3-hover-text-light-blue:hover{color:#87CEEB!important}
+.w3-text-brown,.w3-hover-text-brown:hover{color:#795548!important}
+.w3-text-cyan,.w3-hover-text-cyan:hover{color:#00bcd4!important}
+.w3-text-blue-grey,.w3-hover-text-blue-grey:hover,.w3-text-blue-gray,.w3-hover-text-blue-gray:hover{color:#607d8b!important}
+.w3-text-green,.w3-hover-text-green:hover{color:#4CAF50!important}
+.w3-text-light-green,.w3-hover-text-light-green:hover{color:#8bc34a!important}
+.w3-text-indigo,.w3-hover-text-indigo:hover{color:#3f51b5!important}
+.w3-text-khaki,.w3-hover-text-khaki:hover{color:#b4aa50!important}
+.w3-text-lime,.w3-hover-text-lime:hover{color:#cddc39!important}
+.w3-text-orange,.w3-hover-text-orange:hover{color:#ff9800!important}
+.w3-text-deep-orange,.w3-hover-text-deep-orange:hover{color:#ff5722!important}
+.w3-text-pink,.w3-hover-text-pink:hover{color:#e91e63!important}
+.w3-text-purple,.w3-hover-text-purple:hover{color:#9c27b0!important}
+.w3-text-deep-purple,.w3-hover-text-deep-purple:hover{color:#673ab7!important}
+.w3-text-red,.w3-hover-text-red:hover{color:#f44336!important}
+.w3-text-sand,.w3-hover-text-sand:hover{color:#fdf5e6!important}
+.w3-text-teal,.w3-hover-text-teal:hover{color:#009688!important}
+.w3-text-yellow,.w3-hover-text-yellow:hover{color:#d2be0e!important}
+.w3-text-white,.w3-hover-text-white:hover{color:#fff!important}
+.w3-text-black,.w3-hover-text-black:hover{color:#000!important}
+.w3-text-grey,.w3-hover-text-grey:hover,.w3-text-gray,.w3-hover-text-gray:hover{color:#757575!important}
+.w3-text-light-grey,.w3-hover-text-light-grey:hover,.w3-text-light-gray,.w3-hover-text-light-gray:hover{color:#f1f1f1!important}
+.w3-text-dark-grey,.w3-hover-text-dark-grey:hover,.w3-text-dark-gray,.w3-hover-text-dark-gray:hover{color:#3a3a3a!important}
+.w3-border-amber,.w3-hover-border-amber:hover{border-color:#ffc107!important}
+.w3-border-aqua,.w3-hover-border-aqua:hover{border-color:#00ffff!important}
+.w3-border-blue,.w3-hover-border-blue:hover{border-color:#2196F3!important}
+.w3-border-light-blue,.w3-hover-border-light-blue:hover{border-color:#87CEEB!important}
+.w3-border-brown,.w3-hover-border-brown:hover{border-color:#795548!important}
+.w3-border-cyan,.w3-hover-border-cyan:hover{border-color:#00bcd4!important}
+.w3-border-blue-grey,.w3-hover-border-blue-grey:hover,.w3-border-blue-gray,.w3-hover-border-blue-gray:hover{border-color:#607d8b!important}
+.w3-border-green,.w3-hover-border-green:hover{border-color:#4CAF50!important}
+.w3-border-light-green,.w3-hover-border-light-green:hover{border-color:#8bc34a!important}
+.w3-border-indigo,.w3-hover-border-indigo:hover{border-color:#3f51b5!important}
+.w3-border-khaki,.w3-hover-border-khaki:hover{border-color:#f0e68c!important}
+.w3-border-lime,.w3-hover-border-lime:hover{border-color:#cddc39!important}
+.w3-border-orange,.w3-hover-border-orange:hover{border-color:#ff9800!important}
+.w3-border-deep-orange,.w3-hover-border-deep-orange:hover{border-color:#ff5722!important}
+.w3-border-pink,.w3-hover-border-pink:hover{border-color:#e91e63!important}
+.w3-border-purple,.w3-hover-border-purple:hover{border-color:#9c27b0!important}
+.w3-border-deep-purple,.w3-hover-border-deep-purple:hover{border-color:#673ab7!important}
+.w3-border-red,.w3-hover-border-red:hover{border-color:#f44336!important}
+.w3-border-sand,.w3-hover-border-sand:hover{border-color:#fdf5e6!important}
+.w3-border-teal,.w3-hover-border-teal:hover{border-color:#009688!important}
+.w3-border-yellow,.w3-hover-border-yellow:hover{border-color:#ffeb3b!important}
+.w3-border-white,.w3-hover-border-white:hover{border-color:#fff!important}
+.w3-border-black,.w3-hover-border-black:hover{border-color:#000!important}
+.w3-border-grey,.w3-hover-border-grey:hover,.w3-border-gray,.w3-hover-border-gray:hover{border-color:#9e9e9e!important}
+.w3-border-light-grey,.w3-hover-border-light-grey:hover,.w3-border-light-gray,.w3-hover-border-light-gray:hover{border-color:#f1f1f1!important}
+.w3-border-dark-grey,.w3-hover-border-dark-grey:hover,.w3-border-dark-gray,.w3-hover-border-dark-gray:hover{border-color:#616161!important}
+.w3-border-pale-red,.w3-hover-border-pale-red:hover{border-color:#ffe7e7!important}.w3-border-pale-green,.w3-hover-border-pale-green:hover{border-color:#e7ffe7!important}
+.w3-border-pale-yellow,.w3-hover-border-pale-yellow:hover{border-color:#ffffcc!important}.w3-border-pale-blue,.w3-hover-border-pale-blue:hover{border-color:#e7ffff!important}

+ 348 - 0
css/w3_original.css

@@ -0,0 +1,348 @@
+/* W3.CSS 2.82 by Jan Egil and Borge Refsnes */
+html{box-sizing:border-box}*,*:before,*:after{box-sizing:inherit}
+/* Extract from normalize.css by Nicolas Gallagher and Jonathan Neal git.io/normalize */
+html{-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%}body{margin:0}
+article,aside,details,figcaption,figure,footer,header,main,menu,nav,section,summary{display:block}
+audio,canvas,progress,video{display:inline-block}progress{vertical-align:baseline}
+audio:not([controls]){display:none;height:0}[hidden],template{display:none}
+a{background-color:transparent;-webkit-text-decoration-skip:objects}
+a:active,a:hover{outline-width:0}abbr[title]{border-bottom:none;text-decoration:underline;text-decoration:underline dotted}
+dfn{font-style:italic}mark{background:#ff0;color:#000}
+small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}
+sub{bottom:-0.25em}sup{top:-0.5em}figure{margin:1em 40px}
+img{border-style:none}svg:not(:root){overflow:hidden}
+code,kbd,pre,samp{font-family:monospace,monospace;font-size:1em}
+hr{box-sizing:content-box;height:0;overflow:visible}
+button,input,select,textarea{font:inherit;margin:0}optgroup{font-weight:bold}
+button,input{overflow:visible}button,select{text-transform:none}
+button,html [type=button],[type=reset],[type=submit]{-webkit-appearance:button}
+button::-moz-focus-inner, [type=button]::-moz-focus-inner, [type=reset]::-moz-focus-inner, [type=submit]::-moz-focus-inner{border-style:none;padding:0}
+button:-moz-focusring, [type=button]:-moz-focusring, [type=reset]:-moz-focusring, [type=submit]:-moz-focusring{outline:1px dotted ButtonText}
+fieldset{border:1px solid #c0c0c0;margin:0 2px;padding:.35em .625em .75em}
+legend{color:inherit;display:table;max-width:100%;padding:0;white-space:normal}textarea{overflow:auto}
+[type=checkbox],[type=radio]{padding:0}
+[type=number]::-webkit-inner-spin-button,[type=number]::-webkit-outer-spin-button{height:auto}
+[type=search]{-webkit-appearance:textfield;outline-offset:-2px}
+[type=search]::-webkit-search-cancel-button,[type=search]::-webkit-search-decoration{-webkit-appearance:none}
+::-webkit-input-placeholder{color:inherit;opacity:0.54}
+::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}
+/* End extract */
+html,body{font-family:Verdana,sans-serif;font-size:15px;line-height:1.5}html{overflow-x:hidden}
+h1,h2,h3,h4,h5,h6,.w3-slim,.w3-wide{font-family:"Segoe UI",Arial,sans-serif}
+h1{font-size:36px}h2{font-size:30px}h3{font-size:24px}h4{font-size:20px}h5{font-size:18px}h6{font-size:16px}
+.w3-serif{font-family:"Times New Roman",Times,serif}
+h1,h2,h3,h4,h5,h6{font-weight:400;margin:10px 0}.w3-wide{letter-spacing:4px}
+h1 a,h2 a,h3 a,h4 a,h5 a,h6 a{font-weight:inherit}
+hr{border:0;border-top:1px solid #eee;margin:20px 0}
+img{margin-bottom:-5px}a{color:inherit}
+.w3-image{max-width:100%;height:auto}
+.w3-table,.w3-table-all{border-collapse:collapse;border-spacing:0;width:100%;display:table}
+.w3-table-all{border:1px solid #ccc}
+.w3-bordered tr,.w3-table-all tr{border-bottom:1px solid #ddd}
+.w3-striped tbody tr:nth-child(even){background-color:#f1f1f1}
+.w3-table-all tr:nth-child(odd){background-color:#fff}
+.w3-table-all tr:nth-child(even){background-color:#f1f1f1}
+.w3-hoverable tbody tr:hover,.w3-ul.w3-hoverable li:hover{background-color:#ccc}
+.w3-centered tr th,.w3-centered tr td{text-align:center}
+.w3-table td,.w3-table th,.w3-table-all td,.w3-table-all th{padding:8px 8px;display:table-cell;text-align:left;vertical-align:top}
+.w3-table th:first-child,.w3-table td:first-child,.w3-table-all th:first-child,.w3-table-all td:first-child{padding-left:16px}
+.w3-btn,.w3-btn-block{border:none;display:inline-block;outline:0;padding:6px 16px;vertical-align:middle;overflow:hidden;text-decoration:none!important;color:#fff;background-color:#000;text-align:center;cursor:pointer;white-space:nowrap}
+.w3-btn:hover,.w3-btn-block:hover,.w3-btn-floating:hover,.w3-btn-floating-large:hover{box-shadow:0 8px 16px 0 rgba(0,0,0,0.2),0 6px 20px 0 rgba(0,0,0,0.19)}
+.w3-btn,.w3-btn-floating,.w3-btn-floating-large,.w3-closenav,.w3-opennav{-webkit-touch-callout:none;-webkit-user-select:none;-khtml-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}   
+.w3-btn-floating,.w3-btn-floating-large{display:inline-block;text-align:center;color:#fff;background-color:#000;position:relative;overflow:hidden;z-index:1;padding:0;border-radius:50%;cursor:pointer;font-size:24px}
+.w3-btn-floating{width:40px;height:40px;line-height:40px}.w3-btn-floating-large{width:56px;height:56px;line-height:56px}
+.w3-disabled,.w3-btn:disabled,.w3-btn-floating:disabled,.w3-btn-floating-large:disabled{cursor:not-allowed;opacity:0.3}
+.w3-btn.w3-disabled *,.w3-btn-block.w3-disabled,.w3-btn-floating.w3-disabled *,.w3-btn:disabled *,.w3-btn-floating:disabled *{pointer-events:none}
+.w3-btn.w3-disabled:hover,.w3-btn-block.w3-disabled:hover,.w3-btn:disabled:hover,.w3-btn-floating.w3-disabled:hover,.w3-btn-floating:disabled:hover,
+.w3-btn-floating-large.w3-disabled:hover,.w3-btn-floating-large:disabled:hover{box-shadow:none}
+.w3-btn-group .w3-btn{float:left}.w3-btn-block{width:100%}
+.w3-btn-bar .w3-btn{box-shadow:none;background-color:inherit;color:inherit;float:left}.w3-btn-bar .w3-btn:hover{background-color:#ccc}
+.w3-badge,.w3-tag,.w3-sign{background-color:#000;color:#fff;display:inline-block;padding-left:8px;padding-right:8px;text-align:center}
+.w3-badge{border-radius:50%}
+ul.w3-ul{list-style-type:none;padding:0;margin:0}ul.w3-ul li{padding:6px 2px 6px 16px;border-bottom:1px solid #ddd}ul.w3-ul li:last-child{border-bottom:none}
+.w3-tooltip,.w3-display-container{position:relative}.w3-tooltip .w3-text{display:none}.w3-tooltip:hover .w3-text{display:inline-block}
+.w3-navbar{list-style-type:none;margin:0;padding:0;overflow:hidden}
+.w3-navbar li{float:left}.w3-navbar li a,.w3-navitem{display:block;padding:8px 16px}.w3-navbar li a:hover{color:#000;background-color:#ccc}
+.w3-navbar .w3-dropdown-hover,.w3-navbar .w3-dropdown-click{position:static}
+.w3-navbar .w3-dropdown-hover:hover,.w3-navbar .w3-dropdown-hover:first-child,.w3-navbar .w3-dropdown-click:hover{background-color:#ccc;color:#000}
+.w3-navbar a,.w3-topnav a,.w3-sidenav a,.w3-dropdown-content a,.w3-accordion-content a,.w3-dropnav a{text-decoration:none!important}
+.w3-navbar .w3-opennav.w3-right{float:right!important}.w3-topnav{padding:8px 8px}
+.w3-topnav a{padding:0 8px;border-bottom:3px solid transparent;-webkit-transition:border-bottom .3s;transition:border-bottom .3s}
+.w3-topnav a:hover{border-bottom:3px solid #fff}.w3-topnav .w3-dropdown-hover a{border-bottom:0}
+.w3-opennav,.w3-closenav{color:inherit}.w3-opennav:hover,.w3-closenav:hover{cursor:pointer;opacity:0.8}
+.w3-btn,.w3-btn-floating,.w3-dropnav a,.w3-btn-floating-large,.w3-btn-block,.w3-hover-shadow,.w3-hover-opacity,.w3-hover-opacity-off,.w3-hover-sepia,.w3-hover-grayscale,.w3-hover-greyscale,
+.w3-navbar a,.w3-sidenav a,.w3-pagination li a,.w3-hoverable tbody tr,.w3-hoverable li,.w3-accordion-content a,.w3-dropdown-content a,.w3-dropdown-click:hover,.w3-dropdown-hover:hover,.w3-opennav,.w3-closenav,.w3-closebtn,
+.w3-hover-amber,.w3-hover-aqua,.w3-hover-blue,.w3-hover-light-blue,.w3-hover-brown,.w3-hover-cyan,.w3-hover-blue-grey,.w3-hover-green,.w3-hover-light-green,.w3-hover-indigo,.w3-hover-khaki,.w3-hover-lime,.w3-hover-orange,.w3-hover-deep-orange,.w3-hover-pink,
+.w3-hover-purple,.w3-hover-deep-purple,.w3-hover-red,.w3-hover-sand,.w3-hover-teal,.w3-hover-yellow,.w3-hover-white,.w3-hover-black,.w3-hover-grey,.w3-hover-light-grey,.w3-hover-dark-grey,.w3-hover-text-amber,.w3-hover-text-aqua,.w3-hover-text-blue,.w3-hover-text-light-blue,
+.w3-hover-text-brown,.w3-hover-text-cyan,.w3-hover-text-blue-grey,.w3-hover-text-green,.w3-hover-text-light-green,.w3-hover-text-indigo,.w3-hover-text-khaki,.w3-hover-text-lime,.w3-hover-text-orange,.w3-hover-text-deep-orange,.w3-hover-text-pink,.w3-hover-text-purple,
+.w3-hover-text-deep-purple,.w3-hover-text-red,.w3-hover-text-sand,.w3-hover-text-teal,.w3-hover-text-yellow,.w3-hover-text-white,.w3-hover-text-black,.w3-hover-text-grey,.w3-hover-text-light-grey,.w3-hover-text-dark-grey
+{-webkit-transition:background-color .3s,color .15s,box-shadow .3s,opacity 0.3s,filter 0.3s;transition:background-color .3s,color .15s,box-shadow .3s,opacity 0.3s,filter 0.3s}
+.w3-ripple:active{opacity:0.5}.w3-ripple{-webkit-transition:opacity 0s;transition:opacity 0s}
+.w3-sidenav{height:100%;width:200px;background-color:#fff;position:fixed!important;z-index:1;overflow:auto}
+.w3-sidenav a{padding:4px 2px 4px 16px}.w3-sidenav a:hover{background-color:#ccc}.w3-sidenav a,.w3-dropnav a{display:block}
+.w3-sidenav .w3-dropdown-hover:hover,.w3-sidenav .w3-dropdown-hover:first-child,.w3-sidenav .w3-dropdown-click:hover,.w3-dropnav a:hover{background-color:#ccc;color:#000}
+.w3-sidenav .w3-dropdown-hover,.w3-sidenav .w3-dropdown-click {width:100%}.w3-sidenav .w3-dropdown-hover .w3-dropdown-content,.w3-sidenav .w3-dropdown-click .w3-dropdown-content{min-width:100%}
+.w3-main,#main{transition:margin-left .4s}
+.w3-modal{z-index:3;display:none;padding-top:100px;position:fixed;left:0;top:0;width:100%;height:100%;overflow:auto;background-color:rgb(0,0,0);background-color:rgba(0,0,0,0.4)}
+.w3-modal-content{margin:auto;background-color:#fff;position:relative;padding:0;outline:0;width:600px}.w3-closebtn{text-decoration:none;float:right;font-size:24px;font-weight:bold;color:inherit}
+.w3-closebtn:hover,.w3-closebtn:focus{color:#000;text-decoration:none;cursor:pointer}
+.w3-pagination{display:inline-block;padding:0;margin:0}.w3-pagination li{display:inline}
+.w3-pagination li a{text-decoration:none;color:#000;float:left;padding:8px 16px}
+.w3-pagination li a:hover{background-color:#ccc}
+.w3-input-group,.w3-group{margin-top:24px;margin-bottom:24px}
+.w3-input{padding:8px;display:block;border:none;border-bottom:1px solid #808080;width:100%}
+.w3-label{color:#009688}.w3-input:not(:valid)~.w3-validate{color:#f44336}
+.w3-select{padding:9px 0;width:100%;color:#000;border:1px solid transparent;border-bottom:1px solid #009688}
+.w3-select select:focus{color:#000;border:1px solid #009688}.w3-select option[disabled]{color:#009688}
+.w3-dropdown-click,.w3-dropdown-hover{position:relative;display:inline-block;cursor:pointer}
+.w3-dropdown-hover:hover .w3-dropdown-content{display:block;z-index:1}
+.w3-dropdown-content{cursor:auto;color:#000;background-color:#fff;display:none;position:absolute;min-width:160px;margin:0;padding:0}
+.w3-dropdown-content a{padding:6px 16px;display:block}
+.w3-dropdown-content a:hover{background-color:#ccc}
+.w3-accordion {width:100%;cursor:pointer}
+.w3-accordion-content{cursor:auto;display:none;position:relative;width:100%;margin:0;padding:0}
+.w3-accordion-content a{padding:6px 16px;display:block}.w3-accordion-content a:hover{background-color:#ccc}
+.w3-progress-container{width:100%;height:1.5em;position:relative;background-color:#f1f1f1}
+.w3-progressbar{background-color:#757575;height:100%;position:absolute;line-height:inherit}
+input[type=checkbox].w3-check,input[type=radio].w3-radio{width:24px;height:24px;position:relative;top:6px}
+input[type=checkbox].w3-check:checked+.w3-validate,input[type=radio].w3-radio:checked+.w3-validate{color:#009688} 
+input[type=checkbox].w3-check:disabled+.w3-validate,input[type=radio].w3-radio:disabled+.w3-validate{color:#aaa}
+.w3-responsive{overflow-x:auto}
+.w3-container:after,.w3-panel:after,.w3-row:after,.w3-row-padding:after,.w3-topnav:after,.w3-clear:after,.w3-btn-group:before,.w3-btn-group:after,.w3-btn-bar:before,.w3-btn-bar:after
+{content:"";display:table;clear:both}
+.w3-col,.w3-half,.w3-third,.w3-twothird,.w3-threequarter,.w3-quarter{float:left;width:100%}
+.w3-col.s1{width:8.33333%}
+.w3-col.s2{width:16.66666%}
+.w3-col.s3{width:24.99999%}
+.w3-col.s4{width:33.33333%}
+.w3-col.s5{width:41.66666%}
+.w3-col.s6{width:49.99999%}
+.w3-col.s7{width:58.33333%}
+.w3-col.s8{width:66.66666%}
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+ 316 - 0
ex1_somatorio.html

@@ -0,0 +1,316 @@
+<body>
+  <h2>3.1 - Como somar um número arbitrário de valores</h2>
+  <p>
+    <b>Problema: </b> Faça um programa que leia uma sequência de números inteiros, diferentes de zero, e calcule a sua soma.<br />
+    Se a sequência de entrada tivesse um tamanho fixo conhecido, digamos 4, a descrição do processo não seria complicada, bastando escrever:
+    <center>
+    <table>
+     <tr>
+       <th> C </th>
+       <th>Python</th></tr>
+     <tr>
+       <td>
+         <pre>
+int n1, n2, n3, n4, soma; //cria as 5 variáveis
+                           que serão utilizadas
+scanf("%d %d %d %d", &n1, &n2, &n3, &n4);
+                              //lê 4 inteiros
+soma = n1+n2+n3+n4; //soma os 4 inteiros lidos
+printf("%d", soma); //imprime o resultado da soma 
+         </pre>
+       </td>
+       <td>
+         <pre>
+n1 = input() //lê o primeiro inteiro
+n2 = input() //lê o segundo inteiro
+n3 = input() //lê o terceiro inteiro
+n4 = input() //lê o quarto inteiro
+soma = n1+n2+n3+n4 //soma os 4 inteiros
+print(soma) //imprime o resultado da soma
+         </pre>
+       </td>
+     </tr>
+  </table>
+  <div>
+    <img src="./imgs/soma_4_numeros.png" /><br />
+    <span>Código no iVProg</span>
+  </div>
+</center>
+<br />
+   No entanto a solução muda radicalmente se desejamos escrever um algoritmo que funcione para um número arbitrário de valores de entrada (este número é
+   definido pelo usuário durante a execução do algoritmo). Neste caso, a dificuldade reside no fato de o programa ser capaz de somar uma sequência de qualquer
+   tamanho.<br />
+   Antes de continuar, reflita um pouco sobre esta questão e tente escrever um código que permita a soma de uma sequência de qualquer tamanho.<br />
+   Duas possíveis soluções são:
+   <ul>
+     <li>Ao início da execução do algoritmo o usuário digitar qual o tamanho da sequência</li>
+     <li>Utilizarmos um caracter de escape que indicará o final da sequência</li>
+   </ul>
+  <br />
+  Abaixo iremos apresentar a segunda solução, utilizar um caracter de escape.<br />
+  Uma boa técnica para iniciar o processo de rogramação é admitir algumas sequências de dados de entrada e pensar a partir destes dados. Então examinaremos,
+  por exemplo, a soma da seguinte sequência de entrada: 8  11  3  -7  2 ... 0
+  <ol>
+    <li>Leia o primeiro número 8;</li>
+    <li>Como o número lido !=(diferente) 0, leia o próximo número 3, guardando a soma destes dois 19+3 = 22;</li>
+    <li>Como o último número lido != 0, leia o próximo número 3, guardando com a soma anterior 19+3=22;</li>
+    <li>Como o último número lido != 0, leia o próximo número -7, guardando com a soma anterior 22+(-7)=15;</li>
+  <center>
+    <pre>
+      .
+      .
+      .
+    </pre>
+  </center>
+  <li>Lê o 0, e como o número lido foi 0 imprime a soma final</li>
+  </ol>
+
+  <h3>Quais variáveis são necessárias?</h3>
+  Vemos a necessidades de 2 variáveis: uma para guardar o último número lido e outra para guardar a soma dos número já lidos. Então teremos:
+  <center>
+  <table>
+   <tr>
+     <th> C </th>
+     <th>Python</th></tr>
+   <tr>
+     <td>
+       <pre>int num, soma;</pre>
+     </td>
+     <td>
+       <pre>
+num = 0
+soma = 0</pre>
+     </td>
+   </tr>
+</table>
+</center>
+
+<h3>Quais os comandos necessários antes e depois do bloco de repetição?</h3>
+<p>
+Inicialmente, no código em C o valor das variáveis(quaisquer) está indefinido, já no código em Python está definido em 0 e portanto devemos cuidar das
+"inicializações" antes do primeiro teste <b>while (num !=0)</b>. Quanto deve valer a variável num neste momento inicial?<br />
+Uma solução possível é o tratamento do primeiro número da sequência como caso à parte, antes de entrarmos no comando de repetição. Deste modo, devemos ler
+o primeiro número fora da repetição e já contabilizar na soma.
+<br />
+<b>Exercício 1:</b> <i>Tente elaborar outra solução, que não faça uma primeira leitura de num dentro do laço</i>
+<br />
+Após a repetição devemos imprimir o conteúdo da variável <b>soma</b>, que deverá conter a soma dos elementos da sequência de entrada.<br />
+Escrevendo o código temos:<br />
+<center>
+<table>
+ <tr>
+   <th> C </th>
+   <th>Python</th></tr>
+ <tr>
+   <td>
+     <pre>
+1  int num, soma;
+2  scanf("%d", &num);
+3  soma = num;
+4  while (num != 0){
+5    scanf(%d, &num);
+6    soma = soma + num;
+7  }
+8  printf("%d",soma);
+     </pre>
+   </td>
+   <td>
+     <pre>
+1  num = input();
+2  soma = num;
+3  while num != 0
+4    num = input()
+5    soma = soma + num
+6  print(soma)
+     </pre>
+   </td>
+ </tr>
+</table>
+<div>
+  <img src="./imgs/soma_n_numeros.png" /><br />
+  <span>Código no iVProg</span>
+</div>
+</center>
+<h3>Conceito de simulação de um Algoritmo</h3>
+Um conceito muito importante à programação é o processo de <b>simulação</b> de um algoritmo. Útil na verificação da corretude do mesmo e também para entender
+o seu funcionamento. Na simulação de um algoritmo/programa devemos anotar todas as alterações, de todas suas variáveis, ao longo de seu fluxo de execução para algum
+conjunto de entrada<br />
+Melhor que muitas explicações complicadas é um bom exemplo. Vejamos a simulação do programa acima para o conjunto de entradas 10 3 4 0 no algoritmo em C:
+<center>
+<table>
+  <tr>
+    <th>num</th>
+    <th>soma</th>
+    <th>comando em execução</th>
+    <th>observações</th>
+  </tr>
+  <tr>
+    <td>?</td>
+    <td>?</td>
+    <td>  </td>
+    <td>no início do programa valores das variáveis são desconhecidos, elas apenas foram declaradas</td>
+  </tr>
+  <tr>
+    <td>10</td>
+    <td>?</td>
+    <td>scanf("%d", &num)</td>
+    <td>pega o 1º número de entrada e guarda em num</td>
+  </tr>
+  <tr>
+    <td>10</td>
+    <td>10</td>
+    <td>soma = num</td>
+    <td>Atribui o valor de num a soma</td>
+  </tr>
+  <tr>
+    <td>10</td>
+    <td>10</td>
+    <td> while (num != 0) </td>
+    <td>Como num é diferente de 0, executa os comandos dentro do bloco de repetição (linhas 5 e 6)</td>
+  </tr>
+  <tr>
+    <td>3</td>
+    <td>10</td>
+    <td> scanf("%d", num) </td>
+    <td>Recebe o 2º número de entrada e guarda em num</td>
+  </tr>
+  <tr>
+    <td>3</td>
+    <td>13</td>
+    <td> soma = soma + num </td>
+    <td>atribui a soma o valor da expressão soma + num</td>
+  </tr>
+  <tr>
+    <td>3</td>
+    <td>13</td>
+    <td> while(num!=0) </td>
+    <td>Como num é diferente de 0, o programa continuará a repetição</td>
+  </tr>
+  <tr>
+    <td>4</td>
+    <td>13</td>
+    <td> scanf("%d", num) </td>
+    <td></td>
+  </tr>
+  <tr>
+    <td>4</td>
+    <td>17</td>
+    <td>soma = soma+ num</td>
+    <td></td>
+  </tr>
+  <tr>
+    <td>4</td>
+    <td>17</td>
+    <td>while(num!=0)</td>
+    <td></td>
+  </tr>
+  <tr>
+    <td>0</td>
+    <td>17</td>
+    <td> soma = soma + num </td>
+    <td></td>
+  </tr>
+  <tr>
+    <td>0</td>
+    <td>17</td>
+    <td> while(num!=0) </td>
+    <td>Como soma é igual a 0, o programa pula para a linha 8</td>
+  </tr>
+  <tr>
+    <td>0</td>
+    <td>17</td>
+    <td>printf("%d", soma)</td>
+    <td>Imprime o valor de soma: 17</td>
+  </tr>
+</table>
+</center>
+<b>Saída do programa: 17</b>
+<br />
+Deve-se notar que após o programa "ler" o número 0(C: linha 5; Python: linha 4), ainda é executado o comando soma = soma + num antes do fluxo de execução
+voltar ao inicio do comando <b>while</b>. Mas isto não provoca qualquer erro, uma vez que o valor "lido"(0) não altera o valor da soma. No entanto, o que
+fazer se o programa consistisse em somar uma sequência de inteiros não negativos (positivos ou nulos), finalizada por um número negativo?<br />
+
+Antes de seguir com a leitura pense na questão<br />
+
+Uma primeira tentativa em responder à questão anterior é tentar aproveitar a versão anterior, trocando apenas a condição de parada do while de num != 0
+para num >= 0.<br />
+Porém isto não funcionaria, pois ao digitar um finalizador (número negativo), este será adicionado ao conteúdo de soma(C: linha 6; Python: linha 5), "estragando"
+o resultado final.<br />
+Se a solução do novo problema não pode ser tão semelhante à versão anterior, também não será radicalmente diferente. Basta efetuarmos uma mera inversão entre as
+linhas dentro do comando while(C: 5 com 6; Python: linha 4 com 5), além da troca da condição de parada acima citada.<br />
+<center>
+<table>
+<tr>
+ <th> C </th>
+ <th>Python</th></tr>
+<tr>
+ <td>
+   <pre>
+1  int num, soma;
+2  scanf("%d", &num);
+3  soma = 0;
+4  while (num >= 0){
+5    soma = soma + num;
+6    scanf(%d, &num);
+7  }
+8  printf("%d",soma);
+   </pre>
+ </td>
+ <td>
+   <pre>
+1  num = input();
+2  soma = 0;
+3  while num >= 0:
+4    soma = soma + num
+5    num = input()
+6  print(soma)
+   </pre>
+ </td>
+</tr>
+</table>
+<div>
+<img src="./imgs/soma_n_positivos.png" /><br />
+<span>Código no iVProg</span>
+</div>
+</center>
+Note também a diferença da inicialização da variável <b>soma</b>. Começando com zero ela ficará com o valor desejado após a primeira execução do comando <i>soma = soma + num</i>,
+ou seja, ela assumirá o valor do primeiro elemento da sequência (se este não for negativo). Note também que para uma sequência vazia, ou seja, para a entrada que já começa com um
+número negativo, o resultado escrito na saida será 0, que é o desejado.<br />
+<b>Exercício 2:</b><i>Fala a simulação deste programa para as entradas 10   3   4   -5 e veja as diferenças em relação à versão anterior do código, prestando atenção às linhas
+5 e 6 no C, 4 e 5 no Python. Note que após a leitura do número -5, não é executado o comando <b>soma = soma + num</b>, pois o teste do <b>while</b> fica falso e o programa para
+o comando de escrita (printf no C; print no Python) </i><br /><br />
+
+<b>Exercício 3: </b><i>Ainda considerando o enunciado do problema 2, verifique o que há de errado com o programa a seguir:</i><br />
+<center>
+<table>
+<tr>
+ <th> C </th>
+ <th>Python</th></tr>
+<tr>
+ <td>
+   <pre>
+1  int num, soma;
+2  scanf("%d", &num);
+3  soma = 0;
+4  while(num!=0){
+5    scanf("%d", num);
+6    soma = soma + num;
+7  }
+8  printf("%d", soma);
+   </pre>
+ </td>
+ <td>
+   <pre>
+1  num = input();
+2  soma = 0
+3  while num != 0:
+4    num = input()
+5    soma = soma+num
+6  print(soma)
+   </pre>
+ </td>
+</tr>
+</table>
+</center>
+</p>
+</body>

+ 185 - 0
ex2_potencia.html

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+<body>
+  <h2>3.3 - Como computar uma potência de inteiros usando laço de repetição</h2>
+  <p>
+    <b>Problema 3:</b><i>Dado X real e N natural, faça um programa que calcule X<sup>N</sup></i><br />
+    Novamente, se N fosse fixo, por exemplo n=3, bastaria fazer<br />
+    <center>
+      <table>
+       <tr>
+         <th> C </th>
+         <th>Python</th></tr>
+       <tr>
+         <td>
+           <pre>
+  1  int x;
+  2  scanf("%d", &x);
+  3  printf("%d", x*x*x);
+           </pre>
+         </td>
+         <td>
+           <pre>
+  1  x = input()
+  2  print(x*x*x)
+           </pre>
+         </td>
+       </tr>
+      </table>
+      <div>
+        <img src="./imgs/potencia_x_3.png" /><br />
+        <span>Código no iVProg</span>
+      </div>
+    </center>
+  Portanto a dificuldade deste problema se encontra na repetição arbitrária: repetir a operação de multiplicação um número variável de vezes, dependente da vontade do usuário.<br />
+  Novamente, vamos iniciar o processo de resolução examinando um exemplo, x=2 e n=7.<br />
+  1. Multiplique X por X, guardando o resultado desta conta(4); <br />
+  2. Multiplique por x o resultado guardado, guardando o novo resultado (8);<br />
+  3. Repita o passo(2) outras 4 vezes (pois n=7 e x já entrou 3 vezes como fator de multiplicação) obtendo o resultado final, 128.<br />
+  <h3>Quais são as variáveis necessárias?</h3>
+  Claramente precisamos de variáveis para armazenar X e N. Além destas, será necessária outra variável (<b>result</b>) para armazenar o resultado das operações de potenciação de X,
+  sem a qual não será possível guardar o resultado das multiplações executadas(reflita sobre isto!).<br />
+  Neste problema, notamos uma novidade em relação ao anterior, precisamos contar quantas vezes já usamos o fator X (original). assim, vamos denotar esta variável pelo sugestivo nome de
+  <b>cont</b>: a cada multiplicação somaremos 1 nessa variável. Assim, deveremos declarar as seguintes variáveis:<br />
+  <center>
+    int x, n, result, cont;
+  </center>
+  <h3>Quais os comandos devem aparecer dentor do bloco de repetição?</h3>
+  Podemos observar no esquema inicial, elaborado acima, que o passo (2) é a parte repetitiva do processo: multiplicar o resultado atual de <b>result</b> por X, guardando este produto
+  novamente em <b>result</b>. Feito isto, devemos então somar 1 ao contador <b>cont</b>, para indicar que mais uma multiplicação foi efetuada.
+  <center>
+  <table>
+   <tr>
+     <th> C </th>
+     <th>Python</th></tr>
+   <tr>
+     <td>
+       <pre>
+  while (condição){
+    result = result*x;
+    cont = cont+1;
+  }
+       </pre>
+     </td>
+     <td>
+       <pre>
+  while condição:
+    result = result*x
+    cont = cont+1
+       </pre>
+     </td>
+   </tr>
+  </table>
+  </center>
+  <h3>Qual a condição para que continue a repetição?</h3>
+  Já foi observado que a variável <b>cont</b> serve para contar quantas vezes o fator X já entrou no produto, assim devemos interromper o laço quando <b>cont==n</b>, ou de outro modo,
+  devemos continuar enquanto <b>cont< n</b>.
+  <center>
+  <table>
+   <tr>
+     <th> C </th>
+     <th>Python</th></tr>
+   <tr>
+     <td>
+       <pre>
+  while (<b>cont < n</b>){
+    result = result*x;
+    cont = cont+1;
+  }
+       </pre>
+     </td>
+     <td>
+       <pre>
+  while <b>cont < n</b>:
+    result = result*x
+    cont = cont+1
+       </pre>
+     </td>
+   </tr>
+  </table>
+  </center>
+  <h3>O que deve vir antes da repetição?</h3>
+  Em primeiro lugar, devemos ler os valores <b>x</b> e <b>n</b>. Precisamos também atribuir valores iniciais adequados às variáveis <B>cont</B> e <b>result</b>. Como <b>cont</b> totaliza
+  quantos fatores <b>x</b> já entraram no produto, o valor inicial de <b>cont</b> é zero. Assim, após a primeira execução do comando <b>result = result*x</b>, gostariamos de obter o valor
+  de <b>x</b> em <b>result</b> e por isto devemos impor que <b>result</b> comece com o valor 1.<br />
+  Interrompido o laço, a resposta estará armazenada em <b>result</b>:
+  <center>
+  <table>
+   <tr>
+     <th> C </th>
+     <th>Python</th></tr>
+   <tr>
+     <td>
+       <pre>
+  1  int x, n, result, cont;
+  2  scanf("%d %d", &x, &n);
+  3  cont = 0;
+  4  result = 1;
+  5  while (<b>cont < n</b>){
+  6    result = result*x;
+  7    cont = cont+1;
+  8  }
+  9  printf("%d", result);
+       </pre>
+     </td>
+     <td>
+       <pre>
+  1  x = input()
+  2  n = input()
+  3  cont = 0
+  4  result = 1
+  5  while <b>cont < n</b>:
+  6    result = result*x
+  7    cont = cont+1
+  8  print(result)
+       </pre>
+     </td>
+   </tr>
+  </table>
+  <div>
+    <img src="./imgs/potencia_x_n.png" /><br />
+    <span>Código no iVProg</span>
+  </div>
+  </center>
+  <b>Exercício 4</b> <i>Repare que o programa dá a resposta correta quando n==0, porém quando x==0 e n==0 teriamos um resultado, mesmo que na matemática 0<sup>0</sup>
+    é indeterminado.</i><br />
+  <b>Exercício 5</b> <i>Sugerimos como exercício a simulação deste programa, para alguns dados de entrada à escolha do leitor.</i><br />
+  <b>Exercicio 6</b> <i>O programa abaixo foi proposto para calcular x<sup>n</sup>. Analise o algoritmo, ele está correto? Se não estiver o que há de errado?</i>
+  <center>
+  <table>
+   <tr>
+     <th> C </th>
+     <th>Python</th></tr>
+   <tr>
+     <td>
+       <pre>
+  1  int x, n, cont;
+  2  scanf("%d %d", &x, &n);
+  3  cont = 0;
+  4  while (cont < n){
+  5    x = x*x;
+  6    cont = cont+1;
+  7  }
+  8  printf("%d", x);
+       </pre>
+     </td>
+     <td>
+       <pre>
+  1  x = input()
+  2  n = input()
+  3  cont = 0
+  4  while cont < n:
+  5    x = x*x
+  6    cont = cont+1
+  7  print(x)
+       </pre>
+     </td>
+   </tr>
+  </table>
+  <div>
+    <img src="./imgs/potencia_x_n_errada.png" /><br />
+    <span>Código no iVProg</span>
+  </div>
+  </center>
+  <b>Exercício 7</b> <i>É possível alterar o programa-solução do problema 3, dispensando a variável contadora <b>cont</b>? Isto é, tente deduzir uma outra versão para o
+  referido problema, utilizando apenas três variáveis <b>x</b>, <b>n</b> e <b>result</b></i>.
+  </p>
+</body>

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