定义四则函数运算

# 定义四则运算函数
def calculate(num1, num2, operator):
result = 0

if operator == '+':
result = num1 + num2
elif operator == '-':
result = num1 - num2
elif operator == '*':
result = num1 * num2
elif operator == '/':
if num2 != 0:
result = num1 / num2
else:
result = "Error: 除数不能为0"
else:
result = "Error: 不支持的运算符"

return result

# 输入两个数字和运算符
num1 = float(input("请输入第一个数字: "))
num2 = float(input("请输入第二个数字: "))
operator = input("请输入运算符 (+, -, *, /): ")

# 计算并输出结果
result = calculate(num1, num2, operator)
print(f"计算结果: {result}")