Matrix Multiplication

matrix_multiplication.c

#include<stdio.h>
#include<stdlib.h>

int main() {
	int r1, c1, r2, c2;
	int i, j, k;			/* Counters */
	printf("Enter size of the 1st matrix (m * n):\n");
	scanf("%d %d", &r1, &c1);

	int A[r1][c1];
	
	printf("Now enter a %dx%d matrix:\n", r1, c1);
	for(i = 0; i < r1; i++) {
		for(j = 0; j < c1; j++) {
			scanf("%d", &A[i][j]);
		}
	}

	printf("Enter size of the 2nd matrix (m * n):\n");
	scanf("%d %d", &r2, &c2);
	
	int B[r2][c2];
	
	printf("Now enter a %dx%d matrix:\n", r2, c2);
	for(i = 0; i < r2; i++) {
		for(j = 0; j < c2; j++) {
			scanf("%d", &B[i][j]);
		}
	}

	int result[r1][c2];

	if (r2 == c1) {
		for(i = 0; i < r1; i++) {
			for(j = 0; j < c2; j++) {
				result[i][j] = 0;
				
				for(k = 0; k < r2; k++) {
					result[i][j] = result[i][j] + A[i][k] * B[k][j];
				}

				printf("%d\t", result[i][j]);
			}

			printf("\n");
		}
	}
	else {
		printf("Matrix Multiplication not possible.");
	}

	return 0;
}