Added Reverse Polish Notation Calculator (#899)

Rakesh9100 · May 27, 2024 · 9539c6c · 9539c6c
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diff --git a/Calculators/RPN-Calculator/README.md b/Calculators/RPN-Calculator/README.md
@@ -0,0 +1,15 @@
+# <p align="center">RPN Calculator</p>
+
+## Description :-
+
+RPN(Reverse Polish Notation) Calculator represents expressions by placing the operator symbol after the operands.
+
+## Tech Stacks :-
+
+- HTML
+- CSS
+- JavaScript
+
+## Screenshots :-
+
+![image](https://github.com/Rakesh9100/CalcDiverse/assets/73993775/18f3c287-2e10-4b2a-a714-5f5faf03dc7b)
diff --git a/Calculators/RPN-Calculator/index.html b/Calculators/RPN-Calculator/index.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <link rel="stylesheet" href="style.css">
+    <title>RPN Calculator</title>
+</head>
+<body>
+    <div class="container">
+        <h1>RPN Calculator</h1>
+        <input type="text" id="expression" placeholder="Enter RPN expression">
+        <button onclick="calculateRPN()">Calculate</button>
+        <div class="result" id="result"></div>
+    </div>
+    <script src="script.js"></script>
+</body>
+</html>
diff --git a/Calculators/RPN-Calculator/script.js b/Calculators/RPN-Calculator/script.js
@@ -0,0 +1,49 @@
+function evaluateRPN(expression) {
+    const stack = [];
+    const operators = {
+        '+': (a, b) => a + b,
+        '-': (a, b) => a - b,
+        '*': (a, b) => a * b,
+        '/': (a, b) => {
+            if (b === 0) {
+                throw new Error("Division by zero");
+            }
+            return a / b;
+        }
+    };
+
+    expression.split(' ').forEach(token => {
+        if (operators[token]) {
+            const b = stack.pop();
+            const a = stack.pop();
+            if (a === undefined || b === undefined) {
+                throw new Error("Invalid expression: insufficient operands");
+            }
+            stack.push(operators[token](a, b));
+        } else {
+            const number = parseFloat(token);
+            if (isNaN(number)) {
+                throw new Error(`Invalid token: ${token}`);
+            }
+            stack.push(number);
+        }
+    });
+
+    if (stack.length !== 1) {
+        throw new Error("Invalid expression: too many operands");
+    }
+
+    return stack.pop();
+}
+
+function calculateRPN() {
+    const expression = document.getElementById('expression').value;
+    const resultDisplay = document.getElementById('result');
+
+    try {
+        const result = evaluateRPN(expression);
+        resultDisplay.textContent = `Result: ${result}`;
+    } catch (e) {
+        resultDisplay.textContent = `Error: ${e.message}`;
+    }
+}
diff --git a/Calculators/RPN-Calculator/style.css b/Calculators/RPN-Calculator/style.css
@@ -0,0 +1,87 @@
+body {
+    font-family: Arial, sans-serif;
+    background: #262626; /* Adjust background color for better contrast */
+    margin: 0;
+    padding: 50px;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    height: 100vh;
+}
+
+.container {
+    max-width: 500px;
+    width: 100%;
+    background: #00ffa0; /* Neo Brutalism background */
+    padding: 1rem;
+    border-radius: 1rem;
+    border: 0.5vmin solid #05060f;
+    box-shadow: 0.4rem 0.4rem #05060f;
+    overflow: hidden;
+    color: black;
+    text-align: center;
+}
+
+input, button {
+    padding: 10px;
+    margin: 5px 0; /* Adjust margin to vertical only */
+    font-size: 16px;
+    width: calc(100% - 24px); /* Ensure input and button take full width minus padding */
+    box-sizing: border-box; /* Include padding in width calculation */
+}
+
+button {
+    background-color: #05060f; /* Button color adjustment */
+    color: #00ffa0;
+    border: none;
+    border-radius: 0.5rem;
+    cursor: pointer;
+}
+
+button:hover {
+    background-color: #000; /* Darker hover color */
+}
+
+.result {
+    margin-top: 20px;
+    font-size: 20px;
+}
+
+/* Additional styles for card content */
+.pricing-block-content {
+    display: flex;
+    flex-direction: column;
+    gap: 0.5rem;
+}
+
+.pricing-plan {
+    color: #05060f;
+    font-size: 1.3rem;
+    line-height: 1.25;
+    font-weight: 700;
+}
+
+.price-value {
+    display: flex;
+    color: #05060f;
+    font-size: 1.8rem;
+    line-height: 1.25;
+    font-weight: 700;
+}
+
+.pricing-note {
+    opacity: 0.8;
+}
+
+.check-list {
+    display: flex;
+    flex-direction: column;
+    gap: 0.5rem;
+    margin-top: 0.5rem;
+}
+
+.check-list-item {
+    display: flex;
+    align-items: center;
+    gap: 4px;
+}
diff --git a/index.html b/index.html
@@ -1728,6 +1728,20 @@ <h3>Calculates the Quotient and Remainder.</h3>
                 </div>
             </div>
         </div>
+        <div class="box">
+            <div class="content">
+                <h2>RPN Calculator</h2>
+                <h3>Reverse Polish Notation calculator which represents expressions by placeing the operator after the operands.</h3>
+                <div class="card-footer">
+                    <a href="./Calculators/RPN-Calculator/index.html" target="_blank">
+                        <button>Try Now</button>
+                    </a>
+                    <a href="https://github.com/Rakesh9100/CalcDiverse/tree/main/Calculators/RPN-Calculator" title="Source Code" target="_blank">
+                        <img src="./assets/images/github.png" alt="Source Code"></img>
+                    </a>
+                </div>
+            </div>
+        </div> 
         <div class="box">
             <div class="content">
                 <h2>Ratio Calculator</h2>