具有while循环验证的简单更改计算器

问题描述

我正在创建一个简单的更改计算器。但是我不确定为什么我的while循环不检查用户输入。我希望该程序只接受1到99之间的数字。

    total = int(input('How much change do you need? '))
    while total > 100 and total <= 0:
        print('The change must be between 1 cent and 99 cents.')
        total = int(input('How much change do you need? '))


    def change(total):
        print(total//25,'Quarters')
        total = total%25
        print(total//10,'Dimes')
        total = total%10
        print(total//5,'Nickels')
        total = total%5
        print(total//1,'Pennies')

    change(total)

谢谢！

解决方法

您必须将条件中的“和”更改为“或”，因为一个数字不能同时大于100和小于1。

total = int(input('How much change do you need? '))
while total > 100 or total <= 0:
    print('The change must be between 1 cent and 99 cents.')
    total = int(input('How much change do you need? '))


def change(total):
    print(total//25,'Quarters')
    total = total%25
    print(total//10,'Dimes')
    total = total%10
    print(total//5,'Nickels')
    total = total%5
    print(total//1,'Pennies')

change(total)

,

您只需将“ and”更改为“ or”，即可解决您的问题。

    total = int(input('How much change do you need? '))
while total > 100 or total <= 0:
    print('The change must be between 1 cent and 99 cents.')
    total = int(input('How much change do you need? '))


def change(total):
    print(total//25,'Pennies')

change(total)