Question

当地驾驶执照办公室已要求您编写一个程序，对驾驶执照考试的书面部分进行评分。考试有20个多项选择题。以下是正确的答案：1.A 2.C 3.A 4.A 5.D 6.B 7.C 8.A 9.C 10.B 11.A 12.D 13.C 14.A 15。 D 16.C 17.B 18.B 19.D 20.A

您的程序应将这些正确的答案存储在列表中。该程序应从文本文件中读取学生对20个问题中每个问题的答案，并将答案存储在另一个列表中。在从文件中读取学生的答案后，程序应显示一条消息，指示学生是否通过考试。学生必须正确回答要通过的20个问题中的15个。然后，它应显示正确回答的问题总数，错误回答的问题总数以及显示错误回答问题的问题编号的列表。

如果有人能就我的错误给出一些意见，我们将不胜感激。

def main():
    corr_ans_list = ["A", "C", "A", "A", "D", "B",
                     "C", "A", "C", "B", "A", "D",
                     "C", "A", "D", "C", "B", "B",
                     "D", "A"]
    user_ans_list = []
    corr_count = 0
    incorr_count = 0
    num_questions = 20

    infile = open('user_answers.txt', 'r')

    user_ans_list = infile.readlines()

    infile.close()

    index = 0

    print("Q\tocrr\tYour\tStatus")
    print("#\tAnswer\tAnswer\n--------------------------")

    while index < 20:                 
    print(str(index+1) + "\t" + corr_ans_list[index]+ "\t" + user_ans_list[index],end="\t" )
        if user_ans_list[index].strip() == corr_ans_list[index]:
            corr_count += 1
            index += 1
            print("               Correct")
        else:
            incorr_count += 1
            index += 1
            print("               Wrong")

    percent_corr = (corr_count/num_questions) * 100
    percent_corr_fmt = format(percent_corr, ".1f")
    print("Grade : ", corr_count , "/", num_questions, " = ",
          percent_corr_fmt, sep="")

    if percent_corr >= 75:
        print("Congratulations!! You passed the exam")
    else:
        print("Sorry, you did not pass the exam")


main()

我得到的最终答案。

Q   Corr    Your    Status
#   Answer  Answer
--------------------------
1   A   A
                   Correct
2   C   C
                   Correct
3   A   A
                   Correct
4   A   B
                   Wrong
5   D   D
                   Correct
6   B   B
                   Correct
7   C   C
                   Correct
8   A   A
                   Correct
9   C   C
                   Correct
10  B   B
                   Correct
11  A   B
                   Wrong
12  D   D
                   Correct
13  C   C
                   Correct
14  A   A
                   Correct
15  D   D
                   Correct
16  C   B
                   Wrong
17  B   B
                   Correct
18  B   B
                   Correct
19  D   B
                   Wrong
20  A   A
                   Correct
Grade : 16/20 = 80.0
Congratulations!! You passed the exam

Answer 1

你不需要这个：

user_ans = infile.readline()   # readline reads only one line of a flle
user_ans_list.append(user_ans)

使用readlines将为您提供文件中所有行的列表

user_ans_list = infile.readlines()

这里你需要strip。读取线与换行符一致

if user_ans_list[index].strip() == corr_ans_list[index]:

修复ZeroDivisionError：除以零＆＃34;。当一个数字除以零时，会出现此错误。

num_questions = 10

将上述内容放在上面：

print("Q\tocrr\tYour\tStatus")

你的shouil看起来像这样：

while index < 20:                 
    print(str(index+1) + "\t" + correct_ans_list[index]+ "\t" + user_ans_list[index],end="\t" )
    if user_ans_list[index] == corr_ans_list[index]:
        corr_count += 1
        index += 1
        print("Correct")
    else:
        incorr_count += 1
        index += 1
        print("Wrong")

Answer 2

def read_candidate_answers():
    outfile=open('answers.txt','r')
    answer_list=outfile.read().split()
    return answer_list

def correct_answers():
    correct_list= ['A','C','A','A','D','B','C','A','C','B','A','D','C','A','D','C','B',\ 'B','D','A']
    return correct_list

def result(answer_list,correct_list):
    count=0
    wrong_answers=[]
    for i in range(20):
        if answer_list[i]==correct_list[i]:
            count+=1
        else:
            count+=0
            wrong_answers.append(i)
    if count<15:
        print("Failed")
    else:
        print("Passed")
    print("Number of Correct answers: ", count)
    print("Number of Incorrect answers: ",20-count)
    print("Incorrect answers list is: ", wrong_answers)

answers=read_candidate_answers()
correct=correct_answers()
output=result(answers,correct)

Answer 3

问题是user_ans_list只有一个成员，因为你只从文件中读取一行。

在发布之前尝试对您的错误进行更多研究。谷歌是你的朋友

使用python的驱动程序许可测试问题

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