Write c program to find product of matrices?

Answer 1

#include
#include
#define MAXROWS 10
#define MAXCOLS 10

void main()
{
int A[MAXROWS][MAXCOLS], B[MAXROWS][MAXCOLS], C[MAXROWS][MAXCOLS];
int M, N;

/*Function declarations*/

void readMatrix(int arr[][MAXCOLS], int M, int N);
void printMatrix(int arr[][MAXCOLS], int M, int N);
void productMatrix(int A[][MAXCOLS], int B[][MAXCOLS], int C[][MAXCOLS],
int M, int N);

clrscr();

printf("Enter the value of M and N\n");
scanf("%d %d",&M, &N);
printf ("Enter matrix A\n");
readMatrix(A,M,N);
printf("Matrix A\n");
printMatrix(A,M,N);

printf ("Enter matrix B\n");
readMatrix(B,M,N);
printf("Matrix B\n");
printMatrix(B,M,N);

productMatrix(A,B,C, M,N);

printf ("The product matrix is\n");
printMatrix(C,M,N);
}

/*Input matrix A*/
void readMatrix(int arr[][MAXCOLS], int M, int N)
{
int i, j;
for(i=0; i< M ; i++)
{
for ( j=0; j < N; j++)
{
scanf("%d",&arr[i][j]);
}
}
}
void printMatrix(int arr[][MAXCOLS], int M, int N)
{
int i, j;
for(i=0; i< M ; i++)
{
for ( j=0; j < N; j++)
{
printf("%3d",arr[i][j]);
}
printf("\n");
}
}

/* Multiplication of matrices */
void productMatrix(int A[][MAXCOLS], int B[][MAXCOLS], int C[][MAXCOLS],
int M, int N)
{
int i, j, k;
for(i=0; i< M ; i++)
{
for ( j=0; j < N; j++)
{
C[i][j] = 0 ;
for (k=0; k < N; k++)
{
C[i][j] = C[i][j] + A[i][k] * B[k][j];
}
}
}
}