在嵌套循环内找到一个平均值的类

Question

我正在开发一个小练习程序，它可以让您为尽可能多的学生输入3个测试分数，最后我希望它能够计算出平均值所有学生之间。我能够输入所有学生的名字和分数，它会让我回到他们的平均水平，但是当你输入“*”时，它只会计算出最后一位学生的平均数，我正在设法弄清楚如何计算所有学生的平均数他们的考试成绩

def GetPosInt():  
     nameone = str 

     while nameone != "*": 

      nameone =(input("Please enter a student name or '*' to finish: ")) 

      if nameone != "*": 
       scoreone = int(input("Please enter a score for " + nameone +": ")) 

       if scoreone < 0: 
        print("positive integers please!") 
        break 

       else: 
        scoretwo = float(input("Please enter another score for "+nameone+": ")) 
        scorethree = float(input("Please enter another score for "+nameone+": ")) 

       testscores = scoreone + scoretwo + scorethree 
       avg = testscores/3 
       print("The average score for",nameone,"is ",avg) 
       classtotal = avg 

      if nameone == "*": 
       classavg = classtotal/3 
       print("The class average is: ",classavg) 

# main 
def main(): 
    GetPosInt() 

main() 

Answer 1

COLDSPEED在您处理问题时向您发送了解决方案。如果你想看到不同的解决方案。它在这里......你可以为分数添加条件。

def GetPosInt(): 
    numberOfStudents = 0.0 
    classtotal = 0.0 
    classavg = 0.0 
    while(True): 
     nam = (raw_input("Please enter a student name or '*' to finish ")) 
     if(nam == '*'): 
      print("The average of the class is " + str(classavg)) 
      break 
     numberOfStudents += 1.0 
     scoreone = float(input("Please enter the first score for " + str(nam) + ": ")) 
     scoretwo = float(input("Please enter the second score for " + str(nam) + ": ")) 
     scorethree = float(input("Please enter the third score for " + str(nam) + ": ")) 
     testscores = scoreone + scoretwo + scorethree 
     avg = testscores/3.0 
     print("The average score for " + str(nam) + " is " + str(avg)) 
     classtotal += avg 
     classavg = classtotal/numberOfStudents 

def main(): 
    GetPosInt() 
main() 

Answer 2

这是你的代码的简化版本，使用列表存储多个学生数据，然后在结尾显示这些细节，并且还计算班级的平均分（注释内联）。

def GetPosInt():  
    names = [] # declare the lists you'll use to store data later on 
    avgs = [] 

    while True: 
     name = ... 

     if name != "*": 
      score1 = ... 
      score2 = ... 
      score3 = ... 

      avg = (score1 + score2 + score3)/3 # calculate the student average 

      # append student details in the list 
      names.append(name) 
      avgs.append(avg) 

     else: 
      break 

    for name, avg in zip(names, avgs): # print student-wise average 
     print(name, avg) 

    class_avg = sum(avg)/len(avg) # class average