A multiple-choice quiz has a total of 10 questions. Each question can either be:

Question

A multiple-choice quiz has a total of 10 questions. Each question can either be: A, B, C, D, E (five choices)

The first line of data contains the correct answers to the ten questions in the first 10 consecutive character positions.

For Example: ABBCBBEDCE

Each line in the file contains the answers for the student. Data on a line consists of a student ID (integer), then two spaces, followed by the ten answers given by the student in the next ten consecutive character positions. You must use an X if the student did not answer one of the questions.

For example: 1225 ADBCXCXEDA

There is no limit to how many students there are. A line containing a “student ID” 0 indicates the end of the data. A student’s overall total score is calculated by adding up points

Points for a question are calculated as shown: Correct answer = 5 points, wrong answer = -2 points, no answer = 0 points

.

Write a C program that prints:

1. Each student ID and there overall total score

2. The total number of students

3. The number of correct responses to each of the ten questions individually (example:

Question: 1 2 3 4 5 6 7 8 9 10

Number correct: 5 8 2 9 8 5 3 2 8 4

A loop and array must be used.

Explanation / Answer

C code:

#include <stdio.h>
#include <stdlib.h>

int main()
{
   FILE *ptr_file;
   char buf[1000];
   char ans[12];
   ptr_file =fopen("input.txt","r");
   if (!ptr_file)
       return 1;
   int n = 0;
   int tmp[10];
   for (int i = 0; i < 10; ++i)
   {
       tmp[i] = 0;
   }
   fgets(ans,1000, ptr_file);
   while (fgets(buf,1000, ptr_file)!=NULL)
   {

       if(buf[0] != '0')
       {
           n++;
           char *ID[50];
           int i = 0;
           for (i = 0; i < 50; ++i)
           {
               if(buf[i] == ' ' || buf[i] == ' ')
               {
                   ID[i] = '';
                   i = i+2;
                   break;
               }
               else
               {
                   ID[i] = buf[i];
               }
           }
           int score = 0;
           int x = 0;
           for (int j = i; j < i + 10; ++j)
           {
               if(buf[j] == 'X')
               {

               }
               else if(buf[j] == ans[x])
               {
                   score = score + 5;
                   tmp[x] = tmp[x] + 1;
               }
               else
               {
                   score = score - 2;                  
               }
               x++;
           }
           for (int z = 0; z < i-1; ++z)
           {
           printf("%c", ID[z] );              
           }
           printf("%i ", score );
       }
   }
   printf("Total number of students = %i ", n );

   for (int i = 0; i < 10; ++i)
   {
           printf("%i ", i+1 );  
   }
   printf(" ");
   for (int i = 0; i < 10; ++i)
   {
           printf("%i ", tmp[i] );  
   }

fclose(ptr_file);
   return 0;
}

Sample input.txt

ABBCBBEDCE
101       ABBCBBEDCX
102       ABBCBBEDCD
103       ABBCBBEDEX
0

Sample Output:

101 45
102 43
103 38
Total number of students = 3
1 2 3 4 5 6 7 8 9 10
3 3 3 3 3 3 3 3 2 0

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.