Initial commit

- Add mymath.py with multiply and divide functions
- Add SmartVoyage travel assistant project
- Add .gitignore for Python cache files

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

mymath.py

@@ -0,0 +1,72 @@
+def multiply(a, b):
+    """
+    计算两个数字的乘积
+
+    Args:
+        a: 第一个数字
+        b: 第二个数字
+
+    Returns:
+        两个数字的乘积
+    """
+    return a * b
+
+def divide(a, b):
+    """
+    计算两个数字的商
+
+    Args:
+        a: 被除数
+        b: 除数
+
+    Returns:
+        两个数字的商
+
+    Raises:
+        ValueError: 如果除数为零
+    """
+    if b == 0:
+        raise ValueError("除数不能为零")
+    return a / b
+
+if __name__ == "__main__":
+    # 测试乘法函数
+    print("测试乘法函数:")
+    test_cases_multiply = [
+        (2, 3, 6),
+        (-2, 3, -6),
+        (0, 5, 0),
+        (2.5, 4, 10.0),
+        (-2.5, -2, 5.0)
+    ]
+
+    for a, b, expected in test_cases_multiply:
+        result = multiply(a, b)
+        status = "PASS" if result == expected else "FAIL"
+        print(f"  {status} multiply({a}, {b}) = {result} (期望: {expected})")
+
+    # 测试除法函数
+    print("\n测试除法函数:")
+    test_cases_divide = [
+        (6, 3, 2),
+        (10, 2, 5),
+        (-6, 2, -3),
+        (5, 2, 2.5),
+        (0, 5, 0)
+    ]
+
+    for a, b, expected in test_cases_divide:
+        try:
+            result = divide(a, b)
+            status = "PASS" if result == expected else "FAIL"
+            print(f"  {status} divide({a}, {b}) = {result} (期望: {expected})")
+        except ValueError as e:
+            print(f"  FAIL divide({a}, {b}) 出错: {e}")
+
+    # 测试除数为零的情况
+    print("\n测试除数为零:")
+    try:
+        divide(5, 0)
+        print("  FAIL divide(5, 0) 应该抛出异常但没有")
+    except ValueError as e:
+        print(f"  PASS divide(5, 0) 正确抛出异常: {e}")