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KingNish smolSWE commited on
Commit
739c018
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1 Parent(s): 5295f85

Added graphing functionality to the calculator app (#15)

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- Added graphing functionality to the calculator app (898b6f4a4c25b761017efb032861eba4fcafa30a)


Co-authored-by: smolSWE Bot <smolSWE@users.noreply.huggingface.co>

Files changed (3) hide show
  1. index.html +9 -1
  2. script.js +66 -1
  3. style.css +15 -1
index.html CHANGED
@@ -4,8 +4,9 @@
4
  <head>
5
  <meta charset="UTF-8">
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  <meta name="viewport" content="width=device-width, initial-scale=1.0">
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- <title>Calculator</title>
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  <link rel="stylesheet" href="style.css">
 
9
  </head>
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  <body>
11
  <div class="calculator">
@@ -32,6 +33,13 @@
32
  <button onclick="calculate()">=</button>
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  </div>
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  </div>
 
 
 
 
 
 
 
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  <script src="script.js"></script>
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  </body>
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  </html>
 
4
  <head>
5
  <meta charset="UTF-8">
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  <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Calculator with Graph</title>
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  <link rel="stylesheet" href="style.css">
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+ <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
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  </head>
11
  <body>
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  <div class="calculator">
 
33
  <button onclick="calculate()">=</button>
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  </div>
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  </div>
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+
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+ <div class="graph-container">
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+ <input type="text" id="equation" placeholder="Enter equation (e.g., x^2)">
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+ <button onclick="plotGraph()">Plot Graph</button>
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+ <canvas id="myChart"></canvas>
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+ </div>
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+
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  <script src="script.js"></script>
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  </body>
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  </html>
script.js CHANGED
@@ -1,5 +1,6 @@
1
 
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  let display = document.getElementById('display');
 
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  function appendValue(value) {
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  display.value += value;
@@ -11,12 +12,76 @@ function clearDisplay() {
11
 
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  function calculate() {
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  try {
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- display.value = eval(display.value);
 
 
15
  } catch (error) {
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  display.value = 'Error';
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  }
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  }
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  function deleteLast() {
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  display.value = display.value.slice(0, -1);
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  }
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
 
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  let display = document.getElementById('display');
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+ let chart;
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5
  function appendValue(value) {
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  display.value += value;
 
12
 
13
  function calculate() {
14
  try {
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+ let expression = display.value;
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+ let result = evaluateExpression(expression);
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+ display.value = result;
18
  } catch (error) {
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  display.value = 'Error';
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  }
21
  }
22
 
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+ function evaluateExpression(expression) {
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+ // Basic implementation, more robust parsing needed for complex expressions
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+ expression = expression.replace(/[^-()\d/*+.]/g, ''); // Remove invalid characters
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+ expression = expression.replace(/(\d+\.\d+)/g, parseFloat); // clean floats
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+ expression = expression.replace(/(\d+)/g, parseInt); // clean integers
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+ try {
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+ return new Function('return ' + expression)();
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+ } catch (e) {
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+ return 'Error';
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+ }
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+ }
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+
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+
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  function deleteLast() {
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  display.value = display.value.slice(0, -1);
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  }
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+
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+ function plotGraph() {
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+ const equation = document.getElementById('equation').value;
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+ const xValues = [];
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+ const yValues = [];
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+
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+ for (let x = -10; x <= 10; x += 0.5) {
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+ xValues.push(x);
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+ try {
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+ // Replace x in the equation and evaluate
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+ let y = evaluateExpression(equation.replace(/x/g, x));
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+ yValues.push(y);
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+ } catch (error) {
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+ alert("Invalid equation!");
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+ return;
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+ }
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+ }
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+
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+ // Destroy previous chart if it exists
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+ if (chart) {
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+ chart.destroy();
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+ }
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+
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+ const ctx = document.getElementById('myChart').getContext('2d');
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+ chart = new Chart(ctx, {
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+ type: 'line',
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+ data: {
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+ labels: xValues,
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+ datasets: [{
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+ label: equation,
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+ data: yValues,
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+ borderColor: 'blue',
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+ fill: false
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+ }]
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+ },
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+ options: {
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+ scales: {
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+ x: {
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+ type: 'linear',
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+ position: 'bottom'
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+ },
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+ y: {
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+ type: 'linear',
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+ position: 'left'
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+ }
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+ }
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+ }
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+ });
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+ }
style.css CHANGED
@@ -1,3 +1,4 @@
 
1
  .calculator {
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  width: 300px;
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  margin: 50px auto;
@@ -47,4 +48,17 @@
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  .calculator .buttons button:nth-child(4n):hover {
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  background-color: #f2b96e;
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- }
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+
2
  .calculator {
3
  width: 300px;
4
  margin: 50px auto;
 
48
 
49
  .calculator .buttons button:nth-child(4n):hover {
50
  background-color: #f2b96e;
51
+ }
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+
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+ .graph-container {
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+ width: 600px;
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+ margin: 20px auto;
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+ text-align: center;
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+ }
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+
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+ #equation {
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+ padding: 10px;
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+ font-size: 16px;
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+ width: 400px;
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+ margin-bottom: 10px;
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+ }