不能在 BMI 计算器中使用浮点数答案

【问题标题】：Cannot Use Float in BMI Calculator不能在 BMI 计算器中使用浮点数
【发布时间】：2022-06-28 01:12:11
【问题描述】：

我已经构建了以下代码：

# function to calculate bmi and return a result based on user input

def calculatebmi(weight, height):
    bmivalue = weight // (height ** 2)
    if bmivalue < 18.5:
        print("Underweight "), print(bmivalue)
    elif bmivalue >= 18.5 and bmivalue <= 24.9:
        print("Healthy "), print(bmivalue)
    elif bmivalue <= 25.0 and bmivalue >= 29.9:
        print("Overweight "), print(bmivalue)
    elif bmivalue >= 30.0:
        print("Obese "), print(bmivalue)


# establish usable variables based on user input

user_weight_kg1, user_height_m1 = input("What is your weight in kilograms? "), input("What is your height in meters? ")

# convert user input to float

user_weight_kg2, user_height_m2 = float(user_weight_kg1), float(user_height_m1)

# run the function

calculatebmi(user_weight_kg2, user_height_m2)

无论出于何种原因，当我输入“75”作为体重值并输入“1.7”作为身高值时，它只是简单地返回：

What is your weight in kilograms? 75
What is your height in meters? 1.7

Process finished with exit code 0

如果我使用整数，它可以正常工作：

What is your weight in kilograms? 80
What is your height in meters? 2
Healthy 
20.0

Process finished with exit code 0

我需要能够让我的用户输入一个字符串，然后将其转换为浮点数。我在这里做错了什么？感谢您的帮助！

【问题讨论】：

标签： python function

【解决方案1】：

在bmivalue 计算中尽量避免整数除法

bmivalue =  weight / (height ** 2)

而不是

bmivalue = weight // (height ** 2)

【讨论】：