Question

我正在尝试编写一个程序，该程序使用嵌套循环来收集数据并计算一段时间内的平均降雨量。该计划应询问年数。外循环将每年迭代一次。内循环将迭代十二次，每个月一次。内循环的每次迭代将询问用户该月的降雨量英寸数。

在所有迭代之后，程序应显示整月的nubmer，降雨总英寸和每月平均降雨量。

years = int(input('How many years do you want to track? '))

months = 12

for years_rain in range(years):

total= 0.0

print('\nYear number', years_rain + 1)
print('------------------------------')
for month in range(months):
    print('How many inches for month ', month + 1, end='')
    rain = int(input(' did it rain? '))
    total += rain


number_months = years * months
average = total / number_months

print('The total inches of rain was ', format(total, '.2f'),'.')  
print('The number of months measured was', number_months)
print('The average rainfall was', format(average, '.2f'), 'inches')

此程序的逻辑已关闭。它的平均降雨量是去年的总降雨量，而不是所有年份的降雨量。降雨总量。

我在这个程序的逻辑中出错了什么？

Answer 1

使用格式正确的代码，您会注意到：

for years_rain in range(years):

    total= 0.0

    print('\nYear number', years_rain + 1)
    ...

将total重置，使每年循环的每次迭代归零。将其改为：

total = 0.0

for years_rain in range(years):  

    print('\nYear number', years_rain + 1)
    ...

Answer 2

您的total值正在重置，因此您需要一种方法来跟踪grandTotal。这是实现此目的的一种方法：

years = int(input('How many years do you want to track? '))

months = 12

grandTotal = 0.0 // will store TOTAL rainfall

for years_rain in range(years):

    total= 0.0

    print('\nYear number', years_rain + 1)
    print('------------------------------')
    for month in range(months):
        print('How many inches for month ', month + 1, end='')
        rain = int(input(' did it rain? '))
        total += rain

    grandTotal += total // add total to the grandTotal

number_months = years * months
average = grandTotal / number_months

print('The total inches of rain was ', format(average, '.2f'),'.')  
print('The number of months measured was', number_months)
print('The average rainfall was', format(average, '.2f'), 'inches')

每月降雨平均计划的逻辑帮助

2 个答案: