Question

Write a program that grades arithmetic quizzes as follows: 1. Ask the user how many questions are in the quiz. 2. Ask the user to enter the key (that is, the correct answers). There should be one answer for each question in the quiz, and each answer should be an integer. They can be entered on a single line, e.g., 34 7 13 100 81 3 9 10 321 12 might be the key for a 10-question quiz. You will need to store the key in an array. 3. Ask the user to enter the answers for the quiz to be graded. As for the key, these can be entered on a single line. Again there needs to be one for each question. Note that these answers do not need to be stored; each answer can simply be compared to the key as it is entered. 4. When the user has entered all of the answers to be graded, print the number correct and the percent correct. When this works, add a loop so that the user can grade any number of quizzes with a single key. After the results have been printed for each quiz, ask "Grade another quiz? (y/n)." 

          Write a program that grades arithmetic quizzes as follows:
1. Ask the user how many questions are in the quiz.
2. Ask the user to enter the key (that is, the correct answers). There should be one answer for each question in the quiz, and each answer should be an integer. They can be entered on a single line, e.g., 34 7 13 100 81 3 9 10 321 12 might be the key for a 10-question quiz. You will need to store the key in an array.
3. Ask the user to enter the answers for the quiz to be graded. As for the key, these can be entered on a single line. Again there needs to be one for each question. Note that these answers do not need to be stored; each answer can simply be compared to the key as it is entered.
4. When the user has entered all of the answers to be graded, print the number correct and the percent correct.

When this works, add a loop so that the user can grade any number of quizzes with a single key. After the results have been printed for each quiz, ask "Grade another quiz? (y/n)."
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Added by Gwendolyn T.

Computer Science and Information Technology
Computer Science and Information Technology
Trishna Knowledge Systems 2018 Edition
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Write a program that grades arithmetic quizzes as follows: 1. Ask the user how many questions are in the quiz. 2. Ask the user to enter the key (that is, the correct answers). There should be one answer for each question in the quiz, and each answer should be an integer. They can be entered on a single line, e.g., 34 7 13 100 81 3 9 10 321 12 might be the key for a 10-question quiz. You will need to store the key in an array. 3. Ask the user to enter the answers for the quiz to be graded. As for the key, these can be entered on a single line. Again there needs to be one for each question. Note that these answers do not need to be stored; each answer can simply be compared to the key as it is entered. 4. When the user has entered all of the answers to be graded, print the number correct and the percent correct. When this works, add a loop so that the user can grade any number of quizzes with a single key. After the results have been printed for each quiz, ask "Grade another quiz? (y/n)."
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Transcript

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00:01 In this problem, we're asked to read a bunch of exam scores, a bunch of numerical exam scores, and then from there calculate how many fs, d, cs, bs, and a's we have, and then at the end to return that information to the user.
00:19 So to begin, i've created a new scanner variable.
00:23 I've just called it in, and this is because we're going to be getting user inputs.
00:28 We need a scanner variable.
00:30 Then i also initialized the variable score.
00:34 It's an int.
00:34 I just said equal to zero.
00:36 This variable we're going to be changing every time the user enters a new score, it's kind of like a temporary variable in that sense.
00:46 And then i also initialized f, d, c, b, and a integer variables because we're going to be calculating how many of each of these letter grades that we are receiving.
01:02 So in this while loop here is where we get all the user input, and we continue looping through as long as score is greater than or equal to zero.
01:13 Why are we doing this? well, in the problem, it states that if the user enters a negative value for score, then that signifies or should signify to the program that the loop ends.
01:24 Therefore, that's why we have this conditional here.
01:28 We keep going through the while loop as long as they haven't entered that negative value or scores greater than equal to zero.
01:36 So we prompt the user to go ahead and enter a score...
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