python使用异常处理编写的小程序

直接上代码1：

while True:    f_number = input("Please input first number :")    if f_number == 'q':        break    s_number = input("Please input second number :")    if s_number == 'q':        break    try:        result =int(f_number)+int(s_number)    except ValueError:        print("Enter Error! Please input number.")        break    else:        print(result)