Question

我正在编写一个简单的python程序，可以帮助用户跟踪他们消耗的卡路里数量，并显示用户是否超过当天的卡路里目标。

到目前为止，这是我的代码。

caloriesGoal = float(input('Enter the calorie goal for number of calories for today: '))

numberOfCaloriesConsumed = float(input('Enter the number of calories consumed today'))
totalConsumed = 0
while (numberOfCaloriesConsumed > 1500 and numberOfCaloriesConsumed < 3000):
      numberOfCaloriesConsumed = float(input('How many calories did you consumed?'))
      totalConsumed += numberOfCaloriesConsumed
      count = count + 1
print('Your total calories consumed is: ' , totalConsumed)

if(caloriesGoal > totalConsumed):
      print('The user is within their goal by ', (caloriesGoal - totalConsumed))
else:
      print('The user exceeded their goal by', (totalConsumed - caloriesGoal))

Answer 1

尝试这一点，输出更清楚你想要进入的东西。

while True:
    caloriesGoal = float(input('Enter the calorie goal the day: '))
    if 1500 <= caloriesGoal <= 3000:
        break
    else:
        print("Error: Goal must be between 1500 and 3000 calories!")

totalConsumed = 0
items = 0

while True:
      caloriesConsumed = float(input('Item {}: How many calories was it? (-1 to stop)'.format(items+1)))

      if caloriesConsumed < 0:
          print("Input stopped")
          break

      totalConsumed += caloriesConsumed 
      items += 1

      if totalConsumed > caloriesGoal:
          print("Goal reached/exceeded!")
          break

print('You consumed {} calories in {} items.'.format(totalConsumed, items))

if caloriesGoal > totalConsumed:
      print('The user is within their goal by ', (caloriesGoal - totalConsumed))
else:
      print('The user exceeded their goal by', (totalConsumed - caloriesGoal))

Answer 2

欢迎使用Python！这是我的第二语言，但我喜欢它，就像我的第一语言。你的代码中发生的事情很少有点奇怪。

有趣的是，您正在检查numberOfCaloriesConsumed。如果您正在进入Krispy Kreme甜甜圈，那么您将输入190卡路里。让我们回顾一下：

while (numberOfCaloriesConsumed > 1500 and numberOfCaloriesConsumed < 3000):

如果我们看一下这条线......

numberOfCaloriesConsumed = float(input('Enter the number of calories consumed today'))

...我们为Krispy Kreme甜甜圈输入190，然后我们不能进入循环。你可能想要改变的是一个带有中断机制的无限循环：

while 1:
    numberOfCaloriesConsumed = input('How many calories did you consumed?')
    if (numberOfCaloriesConsumed == "q") or (totalConsumed > 3000): # keep numberOfCaloriesConsumed as a string, to compare for the break
        if (totalConsumed < 1500):
            print("You need to eat more!\n")
        else:
            break
    else:
        if (totalConsumed + int(numberOfCaloriesConsumed)) > 3000:
            print("You eat too much! You're done now!\n")
            break
        totalConsumed = totalConsumed + int(numberOfCaloriesConsumed) #make the string an int, if we're adding it

这样，当用户手动退出循环时（或者如果他们输入的卡路里太多），将退出代码循环。现在，您的用户应该能够输入卡路里数据并将其添加到其中。

另外，我会删除计数器，因为此循环不需要计数器。我们有几个原因可以解释为什么我们不需要这个柜台：

计数器不会直接影响循环（例如，没有while counter < 5）
我们让计算机要求用户输入，所以程序停止并控制人因此没有无限循环
我们有break语句将我们从（新）循环

如何使用while循环来增加值？

2 个答案: