# -*- conding:utf-8 -*-
def getJi(x,y,flag):
    if flag == '+':
        num = x + y
    if flag == '-':
        num = x - y
    if flag == '*':
        num = x * y
    if flag == '/':
        if y != 0: #判断除数是否为零
            num = x / y
        else:
            print("除数为零")
    return (num)
f ='N'
while f == 'N':
    x = int(input("请输入第一个数字: "))
    y = int(input("请输入第二个数字: "))
    flag = input("请输入运算符: ")
    result = getJi(x,y,flag)
    print(result)
    f = input("是否退出程序(Y/N): ")
else:
    print("感谢使用程序!下次再见")