34 lines
796 B
Python
34 lines
796 B
Python
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def multiply(a, b):
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"""返回两个数字的乘积"""
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return a * b
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def divide(a, b):
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"""返回两个数字的商，b不能为零"""
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if b == 0:
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raise ValueError("除数不能为零")
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return a / b
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if __name__ == "__main__":
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# 测试乘法
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assert multiply(3, 4) == 12
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assert multiply(-2, 5) == -10
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assert multiply(0, 100) == 0
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print("乘法测试通过")
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# 测试除法
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assert divide(10, 2) == 5
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assert divide(9, 3) == 3
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assert divide(5, 2) == 2.5
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print("除法测试通过")
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# 测试除零异常
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try:
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divide(1, 0)
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print("ERROR: 除零异常未触发")
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except ValueError as e:
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assert str(e) == "除数不能为零"
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print("除零异常测试通过")
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print("所有测试通过")
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