python 3.3.3
我正在尝试为课程编写一个程序而且我迷路了。这是我需要做的。
我需要根据输入的成绩计算每位学生的平均值。 我需要计算一个班级平均值。 如果学生输入等级为-1的成绩输入停止。 需要打印每个学生成绩的消息。 学生成绩应显示数字成绩和字母成绩。 该消息将基于学生的字母等级。
我如何收集和存储学生的姓名和考试成绩。 这样我就可以将它全部输出到显示学生姓名的位置。 他们的数字平均值,基于该平均值的字母等级, 以及他们收到的字母等级的陈述?
继承了我到目前为止的代码:
def main():
another_student = 'y'
while another_student == 'y' or another_student == 'Y':
student_average()
print()
another_student = input('do you have another student to enter (y/n) ? ')
while another_student == 'n' or another_student == 'N':
student_average_list()
class_average()
break
def student_average():
total = 0.0
print()
student_name = input('what is the students name? ')
print()
print()
print(student_name)
print('-------------------')
number_of_tests = int(input('please enter the number of tests : '))
for test_num in range(number_of_tests):
print('test number', test_num + 1, end='')
score = float(input(': '))
total += score
student_average = total / number_of_tests
print ()
print(student_name,"'s average is : ",student_average, sep='')
def student_average_list():
print ('kahdjskh')
def class_average():
print ('alsjd')
main()
答案 0 :(得分:1)
我认为这与你基本上正在寻找的很接近。它定义了一个Student
类,使数据存储和处理更容易管理。
class Student(object):
def __init__(self, name):
self.name, self.grades = name, []
def append_grade(self, grade):
self.grades.append(grade)
def average(self):
return sum(self.grades) / len(self.grades)
def letter_grade(self):
average = self.average()
for value, grade in (90, "A"), (80, "B"), (70, "C"), (60, "D"):
if average >= value:
return grade
else:
return "F"
def main():
print()
print('Collecting class student information')
a_class = [] # "class" by itself is a reserved word in Python, avoid using
while True:
print()
print('{} students in class so far'.format(len(a_class)))
another_student = input('Do you have another student to enter (y/n) ? ')
if another_student[0].lower() != 'y':
break
print()
student_name = input('What is the student\'s name? ')
a_class.append(Student(student_name))
print()
print('student :', student_name)
print('-------------------')
number_of_tests = int(input('Please enter the number of tests : '))
for test_num in range(1, number_of_tests+1):
print('test number {}'.format(test_num), end='')
score = float(input(' : '))
if score < 0: # stop early?
break
a_class[-1].append_grade(score) # append to last student added
print_report(a_class)
def print_report(a_class):
print()
print('Class Report')
print()
for student in sorted(a_class, key=lambda s: s.name):
print('student: {:20s} average test score: {:3.2f} grade: {}'.format(
student.name, student.average(), student.letter_grade()))
print()
print('The class average is {:.2f}'.format(class_average(a_class)))
def class_average(a_class):
return sum(student.average() for student in a_class) / len(a_class)
main()
答案 1 :(得分:0)
您需要保留整个班级的标记列表。 student_average
函数正在做太多事情。也许创建一个只返回学生标记列表的函数get_student_marks
。您需要一个average
函数来计算列表的平均值,您可以将其用于学生平均值和班级平均值。祝你好运!