Question

CSC888 has 4 people. Each person needs to take 3 tests. Create a 4-by-3 two-dimensional array to store the test scores. Ask the user to enter test scores one at a time to populate this array. Once the whole array is filled, do the following two things.

(1) For each student, display her test scores and the average of the three tests.

(2) For each test, display student scores and the average of the four students.

The following shows a test run of the program:

Enter test scores of student #1

Test #1: 95

Test #2: 92

Test #3: 88

Enter test scores of student #2

Test #1: 87

Test #2: 100

Test #3: 82

Enter test scores of student #3

Test #1: 76

Test #2: 74

Test #3: 81

Enter test scores of student #4

Test #1: 98

Test #2: 97

Test #3: 93

Student #1

Scores: 95 92 88

Average: 91.6666666666667

Student #2

Scores: 87 100 82

Average: 89.6666666666667

Student #3

Scores: 76 74 81

Average: 77

Student #4

Scores: 98 97 93

Average: 96

Test #1

Scores: 95 87 76 98

Average: 89

Test #2

Scores: 92 100 74 97

Average: 90.75

Test #3

Scores: 88 82 81 93

Average: 86

Press any key to continue . . .

Answer 1

#include<stdio.h>
void main()
{
   int score[4][3], i,j;
   float avg;
   char a;
   do{
       for(i=0;i<4;i++)
       {
               printf("Enter test scores of student #%d\n",i+1);
               for(j=0;j<3;j++)
               {
                   printf("Test #%d ",j+1);
                   scanf("%d",&score[i][j]);
               }
       }
       for(i=0;i<4;i++)
       {
           avg=0;
           printf("Student #%d\n",i+1);
           printf("Scores: ");
           for(j=0;j<3;j++)
           {
               avg=avg+score[i][j];
               printf("%d ",score[i][j]);
           }
           printf("\n");
           printf("Average: %f\n",avg/3);
       }
       printf("Press any key to continue . . .",a);
       if((scanf("%c", a)) != '\n')
           break;
       else
           continue;
   }while(1);
}

Output:

Enter test scores of student #1                                                                                                              

Test #1 95                                                                                                                                   

Test #2 92                                                                                                                                   

Test #3 88                                                                                                                                   

Enter test scores of student #2                                                                                                              

Test #1 87                                                                                                                                   

Test #2 100

Test #3 82                                                                                                                                   

Enter test scores of student #3                                                                                                              

Test #1 76                                                                                                                                   

Test #2 74                                                                                                                                   

Test #3 81                                                                                                                                   

Enter test scores of student #4                                                                                                              

Test #1 98

Test #2 97                                                                                                                                   

Test #3 93                                                                                                                                   

Student #1                                                                                                                                   

Scores: 95 92 88                                                                                                                             

Average: 91.666664                                                                                                                           

Student #2     

Scores: 87 100 82                                                                                                                            

Average: 89.666664                                                                                                                           

Student #3                                                                                                                                   

Scores: 76 74 81                                                                                                                             

Average: 77.000000                                                                                                                           

Student #4       

Scores: 98 97 93                                                                                                                             

Average: 96.000000                                                                                                                           

Press any key to continue . . .