From ab546ebdb169ace084306b2626d2cddc91821bee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=BB=84=E4=BC=8A=E9=9B=AF?= <2506439519@qq.com>
Date: Wed, 9 Oct 2024 11:27:01 +0800
Subject: [PATCH] 2.0

---
 jsq2.html | 153 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 153 insertions(+)
 create mode 100644 jsq2.html
diff --git a/jsq2.html b/jsq2.html
new file mode 100644
index 0000000..97e34c9
--- /dev/null
+++ b/jsq2.html
@@ -0,0 +1,153 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>简单计算器</title>
+    <style>
+        body {
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            height: 100vh;
+            margin: 0;
+            font-family: Arial, sans-serif;
+            background-color: #f0f0f0;
+        }
+
+        .calculator {
+            background-color: #444;
+            padding: 20px;
+            border-radius: 10px;
+            box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
+        }
+
+        #display {
+            width: 100%;
+            height: 50px;
+            margin-bottom: 10px;
+            padding: 0px;
+            font-size: 24px;
+            text-align: right;
+            border: none;
+            background-color: #fff;
+            border-radius: 5px;
+        }
+
+        .buttons {
+            display: grid;
+            grid-template-columns: repeat(4, 1fr);
+            gap: 10px;
+        }
+
+        button {
+            padding: 20px;
+            font-size: 20px;
+            border: none;
+            border-radius: 5px;
+            background-color: #666;
+            color: white;
+            cursor: pointer;
+            transition: background-color 0.2s;
+        }
+
+        button:hover {
+            background-color: #888;
+        }
+
+        button:active {
+            background-color: #555;
+        }
+    </style>
+</head>
+<body>
+    <div class="calculator">
+        <input type="text" id="display" disabled>
+        <div class="buttons">
+            <button onclick="clearDisplay()">C</button>
+            <button onclick="appendNumber('7')">7</button>
+            <button onclick="appendNumber('8')">8</button>
+            <button onclick="appendNumber('9')">9</button>
+            <button onclick="chooseOperation('/')">/</button>
+            <button onclick="appendNumber('4')">4</button>
+            <button onclick="appendNumber('5')">5</button>
+            <button onclick="appendNumber('6')">6</button>
+            <button onclick="chooseOperation('*')">*</button>
+            <button onclick="appendNumber('1')">1</button>
+            <button onclick="appendNumber('2')">2</button>
+            <button onclick="appendNumber('3')">3</button>
+            <button onclick="chooseOperation('-')">-</button>
+            <button onclick="appendNumber('0')">0</button>
+            <button onclick="appendNumber('.')">.</button>
+            <button onclick="compute()">=</button>
+            <button onclick="chooseOperation('+')">+</button>
+            <button onclick="chooseOperation('%')">%</button>
+        </div>
+    </div>
+
+    <script>
+        let currentOperand = '';
+        let previousOperand = '';
+        let operation = undefined;
+
+        const display = document.getElementById('display');
+
+        function appendNumber(number) {
+            if (number === '.' && currentOperand.includes('.')) return;
+            currentOperand += number;
+            updateDisplay();
+        }
+
+        function chooseOperation(op) {
+            if (currentOperand === '') return;
+            if (previousOperand !== '') {
+                compute();
+            }
+            operation = op;
+            previousOperand = currentOperand;
+            currentOperand = '';
+        }
+
+        function compute() {
+            let computation;
+            const prev = parseFloat(previousOperand);
+            const current = parseFloat(currentOperand);
+            if (isNaN(prev) || isNaN(current)) return;
+            switch (operation) {
+                case '+':
+                    computation = prev + current;
+                    break;
+                case '-':
+                    computation = prev - current;
+                    break;
+                case '*':
+                    computation = prev * current;
+                    break;
+                case '/':
+                    computation = prev / current;
+                    break;
+                case '%':
+                    computation = prev % current;
+                    break;
+                default:
+                    return;
+            }
+            currentOperand = computation.toString();
+            operation = undefined;
+            previousOperand = '';
+            updateDisplay();
+        }
+
+        function clearDisplay() {
+            currentOperand = '';
+            previousOperand = '';
+            operation = undefined;
+            updateDisplay();
+        }
+
+        function updateDisplay() {
+            display.value = currentOperand;
+        }
+    </script>
+</body>
+</html>
\ No newline at end of file
