From c16bb24021755b667f03bb34bb19ce12c22e4a28 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=BD=A0=E7=9A=84=E5=90=8D=E5=AD=97?=
 <你的邮箱@xxx.com>
Date: Sat, 21 Mar 2026 15:16:37 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20=E6=96=B0=E5=A2=9E=20calculator.py=20?=
 =?UTF-8?q?=E8=AE=A1=E7=AE=97=E5=99=A8=E7=A8=8B=E5=BA=8F?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 calculator.py | 106 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 calculator.py

diff --git a/calculator.py b/calculator.py
new file mode 100644
index 0000000..28dcb6b
--- /dev/null
+++ b/calculator.py
@@ -0,0 +1,106 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+十进制四则运算计算器
+支持加、减、乘、除基本运算
+提供交互式命令行界面
+"""
+
+def add(a, b):
+    """加法"""
+    return a + b
+
+def subtract(a, b):
+    """减法"""
+    return a - b
+
+def multiply(a, b):
+    """乘法"""
+    return a * b
+
+def divide(a, b):
+    """除法，处理除零错误"""
+    if b == 0:
+        raise ValueError("除数不能为零")
+    return a / b
+
+def calculate(expression):
+    """
+    解析并计算表达式
+    表达式格式: 数字1 运算符 数字2，例如: 5 + 3
+    支持运算符: +, -, *, /
+    """
+    try:
+        # 分割表达式
+        parts = expression.strip().split()
+        if len(parts) != 3:
+            raise ValueError("表达式格式错误，请使用格式: 数字 运算符 数字 (例如: 5 + 3)")
+
+        # 解析操作数
+        try:
+            num1 = float(parts[0])
+            num2 = float(parts[2])
+        except ValueError:
+            raise ValueError("操作数必须是数字")
+
+        # 解析运算符并执行计算
+        operator = parts[1]
+        if operator == '+':
+            result = add(num1, num2)
+        elif operator == '-':
+            result = subtract(num1, num2)
+        elif operator == '*':
+            result = multiply(num1, num2)
+        elif operator == '/':
+            result = divide(num1, num2)
+        else:
+            raise ValueError(f"不支持的运算符: {operator}，请使用 +, -, *, /")
+
+        return result
+    except ValueError as e:
+        raise e
+    except Exception as e:
+        raise RuntimeError(f"计算错误: {e}")
+
+def main():
+    """主函数，交互式计算器"""
+    print("=" * 50)
+    print("十进制四则运算计算器")
+    print("=" * 50)
+    print("使用说明:")
+    print("  1. 输入表达式，格式: 数字 运算符 数字")
+    print("  2. 支持的运算符: + (加), - (减), * (乘), / (除)")
+    print("  3. 示例: 5 + 3, 10.5 * 2, 8 / 4")
+    print("  4. 输入 'exit' 或 'quit' 退出程序")
+    print("=" * 50)
+
+    while True:
+        try:
+            # 获取用户输入
+            user_input = input("\n请输入表达式: ").strip()
+
+            # 检查退出命令
+            if user_input.lower() in ['exit', 'quit', 'q']:
+                print("\n感谢使用计算器，再见！")
+                break
+
+            # 跳过空输入
+            if not user_input:
+                continue
+
+            # 计算并显示结果
+            result = calculate(user_input)
+            print(f"结果: {result}")
+
+        except ValueError as e:
+            print(f"输入错误: {e}")
+        except RuntimeError as e:
+            print(f"计算错误: {e}")
+        except KeyboardInterrupt:
+            print("\n\n检测到中断信号，退出程序...")
+            break
+        except Exception as e:
+            print(f"未知错误: {e}")
+
+if __name__ == "__main__":
+    main()
\ No newline at end of file