# Write a program in C to multiply two matrices A and B

Write a program in C to multiply two matrices A and B.

Ans./* C program to multiply the two matrices */
#include
#include
void main()
{
int m, n, p, q, c, d, k, sum = 0;
int ar1, ar2, mul;
printf(“Enter the number of rows and columns of first matrix\n”);
scanf(“%d%d”, &m, &n);
printf(“Enter the elements of first matrix\n”);
for (  c = 0 ; c < m ; c++ )
{
for ( d = 0 ; d < n ; d++ )
{
scanf(“%d”, &ar1[c][d]);
}
}
printf(“Enter the number of rows and columns of second matrix\n”);
scanf(“%d%d”, &p, &q);
if ( n != p )
{
printf(“Multiplication is not possible of the two matrices \n”);
}
else
{
printf(“Enter the elements of second matrix\n”);
for ( c = 0 ; c < p ; c++ )
{
for ( d = 0 ; d < q ; d++ )
{
scanf(“%d”, &ar2[c][d]);
}
}
for ( c = 0 ; c < m ; c++ )
{
for ( d = 0 ; d < q ; d++ )
{
for ( k = 0 ; k < p ; k++ )
{
sum = sum + ar1[c][k]*ar2[k][d];
}
mul[c][d] = sum;
sum = 0;
}
}
printf(“Product of entered matrices:-\n”);
for ( c = 0 ; c < m ; c++ )
{
for ( d = 0 ; d < q ; d++ )
printf(“%d\t”, mul[c][d]);
printf(“\n”);
}
}
getch();
}
Output –
Enter the number of rows and columns of first matrix – 2 2
Enter the elements of first matrix –
2 3
4 3
Enter the number of rows and columns of second matrix – 2 3
5 7 2
5 6 4
Product of entered matrices is –
25 32 16
35 46 20