2D-Multiplication with function | C Language

Q : Write a function to display the multiplication table of the number.

Answer : 

#include<stdio.h>

#include<conio.h>

/*============================

     Girfa Student Help

     Multiplication 2d array using function

==============================*/

void multi(int ar1[3][3],int ar2[3][3],int ar3[3][3])

{

     int r,c,m,tmp;

     for (r = 0; r<3; r++)

     {

           for (c = 0; c<3; c++)

           {

                for (m = 0, tmp = 0; m<3; m++)

                     tmp += ar1[r][m] * ar2[m][c];

                ar3[r][c] = tmp;

           }

     }

}

void main()

{

     int ar1[3][3], ar2[3][3], ar3[3][3], r, c, m, tmp;

     clrscr();

     printf("first array input\n");

     for (r = 0; r<3; r++)

     {

           for (c = 0; c<3; c++)

           {

                printf("Enter no ");

                scanf("%d", &ar1[r][c]);

           }

     }

     printf("second array\n");

     for (r = 0; r<3; r++)

     {

           for (c = 0; c<3; c++)

           {

                printf("Enter no ");

                scanf("%d", &ar2[r][c]);

           }

     }

     /*  Calling Multiplication Function */

     multi(ar1,ar2,ar3);

     clrscr();

     printf("\nFirst array\n");

     for (r = 0; r<3; r++)

     {

           for (c = 0; c<3; c++)

           {

                printf("\t%d", ar1[r][c]);

           }

           printf("\n");

     }

     printf("\nSecond array\n");

     for (r = 0; r<3; r++)

     {

           for (c = 0; c<3; c++)

           {

                  printf("\t%d", ar2[r][c]);

           }

           printf("\n");

     }

     printf("\nMultiplication of array\n");

     for (r = 0; r<3; r++)

     {

           for (c = 0; c<3; c++)

           {

                printf("\t%d", ar3[r][c]);

           }

           printf("\n");

     }

     getch();

}

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