带数组的条件循环答案

【问题标题】：Conditional Loops with arrays带数组的条件循环
【发布时间】：2021-03-25 18:43:40
【问题描述】：

在我的代码中，我尝试使用第二个循环，它应该遍历体重指数数组并调用另一个函数，该函数接受体重指数作为参数并返回个人是否体重过轻、正常体重或超重。

这就是我卡住的地方。代码.....

individuals = ["Mike Jackson", "Mike Tyson", "Mike Jordan"]
bodymass = list()
index = 0

def BMI(height, weight):
    bmi = (weight * 703) / (height ** 2)
    return bmi

for individual in individuals:
    print("Do you want to know the BMI for", individual, "?")
    print("The weight is required for", individual)
    weight = eval(input("Enter weight in pounds here:  "))
    print("The height is required for", individual)
    height = eval(input("Enter height in inches for here:  "))
    bmi = BMI(height, weight)
    bodymass.append(bmi)
    print("The body mass index for", individual, "is:  ", (bmi))

for i in range(len(bodymass)):
    if 18.5 > bodymass[i]:
        print("You are underweight.")
    elif 18.5 <= bodymass[i] < 25:
        print("Your weight is normal.")
    elif bodymass[i] >= 25:
        print("You are overweight.")

==============================================

这是结果...

Do you want to know the BMI for Mike Jackson ?
The weight is required for Mike Jackson
Enter weight in pounds here:  175
The height is required for Mike Jackson
Enter height in inches for here:  72
The body mass index for Mike Jackson is:   23.73167438271605
Your weight is normal.
Do you want to know the BMI for Mike Tyson ?
The weight is required for Mike Tyson
Enter weight in pounds here:  184
The height is required for Mike Tyson
Enter height in inches for here:  80
The body mass index for Mike Tyson is:   20.21125
Your weight is normal.
Your weight is normal.
Do you want to know the BMI for Mike Jordan ?
The weight is required for Mike Jordan
Enter weight in pounds here:  215
The height is required for Mike Jordan
Enter height in inches for here:  78
The body mass index for Mike Jordan is:   24.843030900723207
Your weight is normal.
Your weight is normal.
Your weight is normal.

Process finished with exit code 0

=====================================

我遇到的问题是下一个输入值的人或对象，前一个人的结果显示。因此，第三人称显示“您体重不足”的 3 个值，而不是仅显示该人的结果。

您体重过轻。你体重过轻。你体重过轻。

【问题讨论】：

标签： python arrays python-3.x list numpy

【解决方案1】：

由于(for)函数，在每一轮中，所有的结果都会被打印出来；为解决此问题，创建一个函数并在其中键入代码的第二个块，并在您的第一个 (for) 函数的每一轮中，调用此函数，如下所示：

def bmi_result(bmi) :
    if 18.5 > bmi:
       print("You are underweight.")
    elif 18.5 <= bmi < 25:
       print("Your weight is normal.")
    elif bmi >= 25:
       print("You are overweight.")

使用 bmi_result(bmi) 代替 bodymass.append(bmi) 祝你好运。

【讨论】：

那没有用，它仍然显示下一个结果。
您的体重正常。你的体重是正常的。您的体重正常。

【解决方案2】：

使用这样的代码。当您输入体重和身高时，它会为您提供该人的 BMI 和结果然后你输入下一个人的信息，它会再次给你 BMI 和结果。代码：

individuals = ["Mike Jackson", "Mike Tyson", "Mike Jordan"]
bodymass = list()
index = 0

def BMI(height, weight):
    bmi = (weight * 703) / (height ** 2)
    return bmi


def bmi_result(bmi) :
    if 18.5 > bmi:
       print("You are underweight.")
    elif 18.5 <= bmi < 25:
       print("Your weight is normal.")
    elif bmi >= 25:
       print("You are overweight.")

for individual in individuals:
    print("Do you want to know the BMI for", individual, "?")
    print("The weight is required for", individual)
    weight = eval(input("Enter weight in pounds here:  "))
    print("The height is required for", individual)
    height = eval(input("Enter height in inches for here:  "))
    bmi = BMI(height, weight)
    bmi_result(bmi)
    print("The body mass index for", individual, "is:  ", (bmi))

【讨论】：