Multiplication of Matrix in C

September 22, 2021

C program to Multiply two matrices in C

  • In this problem, we are required to multiply two matrices of same or varied dimensions.
  • First the order of both the matrices is taken as input and in correspondence to it the elements of the matrices are taken as input.
  • The elements of the matrices are then multiplied accordingly.
#include<stdio.h>
#include<stdlib.h>
int main ()
{
    int a[10][10], b[10][10], mul[10][10], r, c, i, j, k;
    printf ("enter the number of row=");
    scanf ("%d", &r);
    printf ("enter the number of column=");
    scanf ("%d", &c);
    printf ("enter the first matrix element=\n");
  
    for (i = 0; i < r; i++)
    {
        for (j = 0; j < c; j++)
	    {
	        scanf ("%d", &a[i][j]);
	    }
    }
    
    printf ("enter the second matrix element=\n");
    for(i = 0; i < r; i++)
    {
        for(j = 0; j < c; j++)
	    {
	        scanf ("%d", &b[i][j]);
	    }
    }

    printf ("multiply of the matrix=\n");
    for (i = 0; i < r; i++)
    {
        for (j = 0; j < c; j++)
	    {
	        mul[i][j] = 0;
	        for (k = 0; k < c; k++)
	        {
	            mul[i][j] += a[i][k] * b[k][j];
	        }
	    }
    }
  
    for (i = 0; i < r; i++)
    {
        for (j = 0; j < c; j++)
	    {
	        printf ("%d\t", mul[i][j]);
	    }
        printf ("\n");
    }
    return 0;
}
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