如何将用户计数器添加到 BMI 计算器？

Question

我制作了这个 BMI 计算器，我希望底部的用户计数在用户每次通过输入“y”使用 BMI 计算器时进行计数。我似乎无法让代码工作。有帮助吗？


user_continue = "y"
counter = 0

while user_continue == "y":
    weight = float(input("What is your weight? (KG) "))
    height = float(input("What is your height? (Metres) "))

#formula to convert weight and height to users bmi 
    bmi = weight/(height*height)

    print("Your BMI is", bmi)

#indicators to state if user is either underwieght, overweight or normal
    
    if bmi < 18:
        print("It indicates you underweight.")
    elif bmi >= 18 and bmi < 25:
        print("It indicates you are within normal bounds.")
    elif bmi >= 25:
        print("It indicates you are overweight.")

    user_continue = input("Add Another BMI? y/n: ")

# add counter
    
    if user_continue != "y":
        counter+=1

        print(counter)
        print("\t\tThank You for using BMI calculator by Joe Saju!")
        print("\n\t\t\t\tPress ENTER to Exit.")
        break

Answer 1

您想在循环的任何迭代中增加计数器，因此您需要在循环内而不是在结束 if 语句中增加 counter 变量。

提示：在循环开始时增加计数器变量（如下面的代码）

在您的情况下，只有当用户想要退出时，计数器才会增加。所以它只会反击一次。

user_continue = "y"
counter = 0

while user_continue == "y":
    # increase the counter at the begining
    counter+=1
    weight = float(input("What is your weight? (KG) "))
    height = float(input("What is your height? (Metres) "))

#formula to convert weight and height to users bmi 
    bmi = weight/(height*height)

    print("Your BMI is", bmi)

#indicators to state if user is either underwieght, overweight or normal
    
    if bmi < 18:
        print("It indicates you underweight.")
    elif bmi >= 18 and bmi < 25:
        print("It indicates you are within normal bounds.")
    elif bmi >= 25:
        print("It indicates you are overweight.")

    user_continue = input("Add Another BMI? y/n: ")
    
    if user_continue != "y":
        # counter+=1 line removed and moved to the begining

        print(counter)
        print("\t\tThank You for using BMI calculator by Joe Saju!")
        print("\n\t\t\t\tPress ENTER to Exit.")
        break

如何将用户计数器添加到 BMI 计算器？

How do you add user counter to BMI calculator?

python

counter

for-loop