这是我的第一个Python程序，我遇到了一些麻烦，请原谅我，如果我有一些简单的语法问题。
我正在编写一个程序，根据一个60％的考试成绩和7个其他考试成绩计算学生的最终成绩，总成绩为最终成绩的40％。要求用户输入一个考试分数，然后要求输入循环读取的7个考试分数。然后根据从考试和测试计算的最终分数确定字母等级。之后，根据给予学生的字母等级打印成绩评论。到目前为止，这是我的代码：
def read_test_scores() :
print("ENTER STUDENT ID: ")
id = int(input())
print("ENTER EXAM SCORE: ")
exam = int(input())
print("ENTER ALL TEST SCORES: ")
score1 = int(input())
score2 = int(input())
score3 = int(input())
score4 = int(input())
score5 = int(input())
score6 = int(input())
score7 = int(input())
sum = (score1 + score2 + score3 + score4 + score5 + score6 + score7)
tavge = sum/7
return tavge
def compute_final_score(tavge, exam) :
final_score = 0.4 * tavge + 0.6 * exam
return final_score
def get_letter_grade(final_score) :
if 90 <= final_score <= 100:
grade = 'A'
elif 80 <= final_score <= 89:
grade = 'B'
elif 70 <= final_score <= 79:
grade = 'C'
elif 60 <= final_score <= 69:
grade = 'D'
else:
grade = 'F'
return grade
def print_comment(grade) :
if grade = 'A':
print "COMMENT: Very Good"
elif grade = 'B':
print "COMMENT: Good"
elif grade = 'C':
print "COMMENT: Satisfactory"
elif grade = 'D':
print "COMMENT: Need Improvement"
elif grade = 'F'
print "COMMENT: Poor"
read_test_scores()
print "TEST AVERAGE IS: " + str(tavge)
compute_final_score()
print "FINAL SCORE IS: " + str(final_score)
get_letter_grade(final_score)
print "LETTER GRADE IS: " + str(grade)
print_comment(grade)
答案 0 :(得分：0)
您的代码中存在许多错误，其中一些错误在评论中，但最关键的部分是您错误地使用了全局变量和局部变量
这是使用正确的方法来修复代码的示例。
https://repl.it/repls/SorrowfulOddballSongbird
tavge = 0
exam = 0
sid = 0
final_score = 0
grade = ''
def read_test_scores() :
global sid
print("ENTER STUDENT ID: ")
sid = int(input())
global exam
print("ENTER EXAM SCORE: ")
exam = int(input())
print("ENTER ALL TEST SCORES: ")
score1 = int(input())
score2 = int(input())
score3 = int(input())
score4 = int(input())
score5 = int(input())
score6 = int(input())
score7 = int(input())
total = (score1 + score2 + score3 + score4 + score5 + score6 + score7)
global tavge
tavge = total/7
#return tavge
def compute_final_score() :
global final_score
final_score = 0.4 * tavge + 0.6 * exam
#return final_score
def get_letter_grade() :
global grade
if 90 <= final_score <= 100:
grade = 'A'
elif 80 <= final_score <= 89:
grade = 'B'
elif 70 <= final_score <= 79:
grade = 'C'
elif 60 <= final_score <= 69:
grade = 'D'
else:
grade = 'F'
#return grade
def print_comment() :
if grade == 'A':
print("COMMENT: Very Good")
elif grade == 'B':
print ("COMMENT: Good")
elif grade == 'C':
print ("COMMENT: Satisfactory")
elif grade == 'D':
print ("COMMENT: Need Improvement")
elif grade == 'F':
print ("COMMENT: Poor")
read_test_scores()
print ("TEST AVERAGE IS: " + str(tavge))
compute_final_score()
print ("FINAL SCORE IS: " + str(final_score))
get_letter_grade()
print ("LETTER GRADE IS: " + str(grade))
print_comment()
但你应该考虑使用参数而不是使用全局
答案 1 :(得分：0)
这是我的答案。代码应该运行。注释将作为注释插入。
# NOTE: I haven't checked whether your math is right, or
# if the computed values are correct. I did however get your
# script to work.
def read_test_scores():
print("ENTER STUDENT ID: ")
id = int(input())
print("ENTER EXAM SCORE: ")
exam = int(input())
print("ENTER ALL TEST SCORES: ")
score1 = int(input())
score2 = int(input())
score3 = int(input())
score4 = int(input())
score5 = int(input())
score6 = int(input())
score7 = int(input())
sum = (score1 + score2 + score3 + score4 + score5 + score6 + score7)
tavge = sum / 7.0
# NOTE: if you want to use any variables from this function,
# then you have to "bring them outside" by "returning"
# them. Here, I return the values tavge, id, and exam. I noticed
# that bringing out "exam" is necessary since you'll
# be using it later on.
return tavge, id, exam
def compute_final_score(tavge, exam):
final_score = 0.4 * tavge + 0.6 * exam
return final_score
def get_letter_grade(final_score):
if 90 <= final_score <= 100:
grade = 'A'
elif 80 <= final_score <= 89:
grade = 'B'
elif 70 <= final_score <= 79:
grade = 'C'
elif 60 <= final_score <= 69:
grade = 'D'
else:
grade = 'F'
return grade
def print_comment(grade):
# NOTE `=` is for assignment. We use it when we want to
# tell python to make a variable mean something. For example:
# a = "some_name" basically means that when we call a, it would
# return the string "some_name".
# What you want to use here is `==` which is the equality operator.
# This checks whether or thing are equal.
if grade == 'A':
print "COMMENT: Very Good"
elif grade == 'B':
print "COMMENT: Good"
elif grade == 'C':
print "COMMENT: Satisfactory"
elif grade == 'D':
print "COMMENT: Need Improvement"
elif grade == 'F':
print "COMMENT: Poor"
# NOTE 1: you need to assign the function results to a
# variable (or variables), otherwise, the result or return value
# will go nowhere and you can't use it
tavge, id, exam = read_test_scores()
print "TEST AVERAGE IS: " + str(tavge)
# NOTE 2: variable names do not have to be the same as
# the name in their respective functions. Here, you can see
# that it will still run even if I changed the variable
# name final_score to my_variable. Although, of course, using
# final_score would still work.
# NOTE 3: the final_score function requires 2 inputs,
# namely tavge and exam. This basically means that you have to feed
# it with these 2 values for it to work. I took the
# tavge and exam variables as the results from your read_test_scores
# function
my_variable = compute_final_score(tavge, exam)
print "FINAL SCORE IS: " + str(my_variable)
grade = get_letter_grade(my_variable)
print "LETTER GRADE IS: " + str(grade)
print_comment(grade)
# FINAL NOTE: I haven't commented regarding coding style etc (like say
# for instance, there are best practices regarding variable names
# within functions, that is, if they should be similar to variable names
# outside the function), but regardless, the code is a good start. I
# would also advise you to try to narrow down your question first
# before posting. This can be done by running your code, and searching
# the internet for the particular erro messages, and if you're still stuck,
# ask here on stackoverflow.
答案 2 :(得分：0)
正如有几个人提到你需要使用==进行比较，你也会在你的if / else之后错过一个冒号。
这是我对你的代码的看法。请记住，这没有和测试，以确保有人实际输入一个数字，而不是文本
“sum”也是Python内置函数的名称，它总结了您提供的任何内容。
def read_test_scores():
scores = []
num_tests = 7
print("ENTER ALL TEST SCORES: ")
for i in range(num_tests):
score = input("Test " + str(i + 1) + ":")
scores.append(int(score))
return sum(scores) / num_tests
def compute_final_score(average, exam_score):
score = 0.4 * average + 0.6 * exam_score
return score
def get_letter_grade(finalized_score):
if 90 <= finalized_score <= 100:
letter_grade = 'A'
elif 80 <= finalized_score <= 89:
letter_grade = 'B'
elif 70 <= finalized_score <= 79:
letter_grade = 'C'
elif 60 <= finalized_score <= 69:
letter_grade = 'D'
else:
letter_grade = 'F'
return letter_grade
def print_comment(letter_grade):
if letter_grade == 'A':
print("COMMENT: Very Good")
elif letter_grade == 'B':
print("COMMENT: Good")
elif letter_grade == 'C':
print("COMMENT: Satisfactory")
elif letter_grade == 'D':
print("COMMENT: Need Improvement")
elif letter_grade == 'F':
print("COMMENT: Poor")
def get_student_id():
print("ENTER STUDENT ID: ")
identity = int(input())
return identity
def get_exam_score():
print("ENTER EXAM SCORE: ")
exam_score = int(input())
return exam_score
if __name__ == '__main__':
student_id = get_student_id()
exam = get_exam_score()
tavge = read_test_scores()
print("TEST AVERAGE IS: " + str(tavge))
final_score = compute_final_score(tavge, exam)
print("FINAL SCORE IS: " + str(final_score))
grade = get_letter_grade(final_score)
print("LETTER GRADE IS: " + str(grade))
print_comment(grade)