Question

print("Welcome to the BMI Index Calculator.")    
student_name = " "    
while student_name != "0":    
     student_name = input("Please begin by entering the student's name, or 0 to quit:")    
     if student_name == "0":
        print("Exiting program...")
        exit()

     def student_height():
        input("Please enter student's height in inches:")
        return

     def student_weight():
        input("Please enter student's weight in pounds:")
        return

     def bmi_profile():
        print(student_name, "'s BMI profile:")
        print("Height:", student_height, '"')
        print("Weight:", student_weight, "lbs.")

     def bmi_index(bmi):
        bmi = (student_weight * 703 / student_height ** 2)
        print("BMI Index:", bmi)
        return bmi

循环运行但def函数未执行。谁能告诉我我的错误在哪里？我尝试多次修改缩进，但显然不是错误...... 提前感谢您的帮助。

Answer 1

您必须先定义函数，然后在while循环中调用它们，如下所示：

修改

我做了一个编辑纠正了你所有的错误，我会一步一步解释：

首先，没有必要创建所有这些方法，如果你创建它们以便练习，那就没关系，但是如果你不返回数据，它就会在苹果酒空间：D：

def student_height():
  return float(input("Please enter student's height in inches:")) #here you return the data

def student_weight():

  return float(input("Please enter student's weight in pounds:")) #float is used to say the type of the input, because it came as a string

def bmi_profile(name, height, weight):
  print(name, "'s BMI profile:")
  print("Height:", height, '"')
  print("Weight:", weight, "lbs.")

def bmi_index(height, weight):
  bmi = float(weight * 703 / height ** 2)
  print("BMI Index: " + str(bmi))
  return bmi


print("Welcome to the BMI Index Calculator.")    
student_name = " "    
while student_name != "0":    
  student_name = input("Please begin by entering the student's name, or 0 to quit:")
  if student_name == "0":
    print("Exiting program...")
    break

  height = student_height() #here you store the data in a variable
  weight = student_weight()
  bmi_profile(student_name, height, weight) #here you use the data stored before
  bmi_index(height, weight) #here also

答案较短：

这只有两个感觉......让它有点可读

def bmi_profile(name, height, weight):
  print(name, "'s BMI profile:")
  print("Height:", height, '"')
  print("Weight:", weight, "lbs.")

def bmi_index(height, weight):
  bmi = float(weight * 703 / height ** 2)
  print("BMI Index: " + str(bmi))



print("Welcome to the BMI Index Calculator.")    
student_name = " "    
while student_name != "0":    
  student_name = input("Please begin by entering the student's name, or 0 to quit:")
  if student_name == "0":
    print("Exiting program...")
    break

  height = float(input("Please enter student's height in inches:"))
  weight = float(input("Please enter student's weight in pounds:"))
  bmi_profile(student_name, height, weight)
  bmi_index(height, weight)

我的def函数没有在Python中执行

1 个答案: