Rewrite the matrix program using Pass-by-Reference:

 

Rewrite the matrix program using Pass-by-Reference:

#include <stdio.h>
#include <stdlib.h>
#include <cmath>
#include <string.h>
#include <math.h>

int main() {
 

   int m, a, p, q, c, d, k, matrix, total = 0;
   int first[3][3], second[3][3], multiply[3][3], addition[3][3], transpose[3][3];
 

   printf("Enter number of rows and columns of first matrix\n");
   scanf("%d%d", &m, &a);
 

   printf("Enter elements of first matrix\n");

   for (c = 0; c < m; c++)
for (d = 0; d < a; d++)
scanf("%d", &first[c][d]);   //first matrix
 

printf("Enter number of rows and columns of second matrix\n");
   scanf("%d%d", &p, &q);
 

   printf("Enter elements of second matrix\n");

for (c = 0; c < p; c++)
for (d = 0; d < q; d++)
scanf("%d", &second[c][d]);
 

do {
   printf("\n1. Multiplication of the 2 Matrices\n");
       printf("2. Addition of the 2 Matrices\n");
       printf("3. Transposition of the 2 Matrices\n");
       printf("4. Go back to Main Menu\n");
 

       printf("Choose a number: \n");
       scanf("%d", &matrix);
 

       if (matrix == 1) {
           for (c = 0; c < m; c++) {
       for (d = 0; d < q; d++) {
   for (k = 0; k < p; k++) {
       total = total + first[c][k]*second[k][d];
       }

   multiply[c][d] = total;
   total = 0;
           }  
       }
 

           printf("\nProduct of the matrices:\n");

       for (c = 0; c < m; c++) {
       for (d = 0; d < q; d++)
       printf("%d\t", multiply[c][d]);

           printf("\n");
            }
 

       }//end of choice 1
 

       else if (matrix == 2) {
           printf("Sum of entered matrices: \n");

            for (c = 0; c < m; c++) {
       for (d = 0 ; d < a; d++) {
        addition[c][d] = first[c][d] + second[c][d];
        printf("%d\t", addition[c][d]);
       }
       printf("\n");
            }
       }//end of choice 2
 

       else if (matrix == 3) {
           for (c = 0; c < m; c++)
       for( d = 0 ; d < a ; d++ )
        transpose[d][c] = first[c][d];
 

    for (c = 0; c < m; c++)
       for( d = 0 ; d < a ; d++ )
        transpose[d][c] = second[c][d];
 

           printf("Transpose of the matrix:\n");

            for (c = 0; c < a; c++) {
       for (d = 0; d < m; d++)
        printf("%d\t", transpose[c][d]);
           printf("\n");
            }
       }//end of choice 3
 

       else if (matrix == 4) {
           //exit
       }
 

       else if (matrix >= 5) {
           printf("INVALID INPUT, please try again");
       }
   }while(matrix!=4);
 

   return 0;
}