简单计算器实现，包括两个数

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# Filename : test.py
# author by : www.dida100.com
# 定义函数
def add(x, y):
   """相加"""
   return x + y
def subtract(x, y):
   """相减"""
   return x - y
def multiply(x, y):
   """相乘"""
   return x * y
def divide(x, y):
   """相除"""
   return x / y
# 用户输入
print("选择运算：")
print("1、相加")
print("2、相减")
print("3、相乘")
print("4、相除")
choice = input("输入你的选择(1/2/3/4):")
num1 = int(input("输入第一个数字: "))
num2 = int(input("输入第二个数字: "))
if choice == '1':
   print(num1,"+",num2,"=", add(num1,num2))
elif choice == '2':
   print(num1,"-",num2,"=", subtract(num1,num2))
elif choice == '3':
   print(num1,"*",num2,"=", multiply(num1,num2))
elif choice == '4':
   print(num1,"/",num2,"=", divide(num1,num2))
else:
   print("非法输入")
​