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)