2-D Array Matrix Multiplication

2-D Array Matrix Multiplication Rule

• Matrix a row must be same as Matrix B column
• Each Cell of Matrix A multiply by each column of matrix B

Code : 

/*   #################################################

          Girfa : Student Help

          Multiplication of 2-d array

          for more program visit : http://girfahelp.blogspot.in/p/c-language-array-programming.html

     #################################################

     */

#include<stdio.h>

#include<conio.h>

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]);

          }

       }

     /*  Multiplication */

       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;

          }

       }

       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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