Product of matrix

Q. Write a C program to accept value of matrix and find out the product of matrix.

OR

Q. Give a example of 2d array with suitable arithmetic operation. 

Ans.

/*source code of product of two matrix c program*/

#include<stdio.h>

#include<conio.h>

#define MAX 3

void input_mat(int [MAX][MAX], int, int);

void show_mat(int [MAX][MAX], int, int);

void prod_mat(int [MAX][MAX],int [MAX][MAX],int [MAX][MAX],int,int);

int main()

{

 int x[MAX][MAX],y[MAX][MAX],z[MAX][MAX];

 int row,col;

 printf("Enter no. of rows and columns : ");

 scanf("%d%d",&row, &col);

 printf("Enter values in first matrix :\n");

 input_mat(x,row,col);

 printf("Enter values in second matrix :\n");

 input_mat(y,row,col);

 prod_mat(x,y,z,row,col);

 printf("\nDisplay product of two matrices :\n");

 show_mat(z,row,col);
 getch();
 return 0;

}

void input_mat(int matA[MAX][MAX], int r, int c)

{

  int i,j;

  for(i=0; i<r; i++)

  {

    for(j=0;j<c; j++)

       scanf("%d",&matA[i][j]);

  }

}

void prod_mat(int matA[MAX][MAX],int matB[MAX][MAX],int matC[MAX][MAX],int r,int c)

{

 int i,j,k;

 for(i=0; i<r; i++)

 {

  for(j=0;j<c; j++)
  {
    matC[i][j]=0;
    for(k=0;k<c; k++)
    {
     matC[i][j]=matC[i][j]+matA[i][j]*matB[i][j];

    }
  }
 }
}
void show_mat(int mat[MAX][MAX], int r, int c)

{

  int i,j;

  for(i=0; i<r; i++)

  {

    for(j=0;j<c; j++)

       printf(" %d",mat[i][j]);

    printf("\n");

  }

}

/************************************

The output of above program would be:

*************************************/

Figure: Screen shot of product of two matrix C program

Output in simple and easy way :-

Enter no. of rows and columns : 3 3

Enter values in First matrix :

4 5 3

2 1 9

6 7 5

Enter values in second matrix :

1 3 2

7 6 4

2 1 0

Display product of two matrices :

12 45 18

42 18 108

36 21 0

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