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

void mul (int **a,int**b,int **c, int m , int k , int n){
	int i , j ,l , sum;
	for (i=0;i<m;i++){
		for (j=0;j<n;j++){
			sum = 0;
			for(l=0;l<k;l++){
				sum += a[i][l]*b[l][j];
			}c[i][j]=sum;
		}
	}
}

int main(){
	int i , j ,m=2 , k=3 , n=4 ;
	int a[2][3]={{1,2,7},{3,4,1}};
	int b[3][4]={{5,6,2,4},{7,8,2,4},{7,2,6,1}};
	
	int **arr_a = (int**)malloc( m *sizeof(int*));
	int **arr_b = (int**)malloc( k *sizeof(int*));
	int **arr_c = (int**)malloc( m *sizeof(int*));
	for (i=0;i<m;i++){
		arr_a[i] = (int*)malloc( k *sizeof(int));
		arr_c[i] = (int*)malloc( n *sizeof(int));
	}
	for (i=0;i<k;i++){
		arr_b[i] = (int*)malloc( n *sizeof(int));
	}
	
	for(i=0;i<m;i++){
		for(j=0;j<k;j++){
			arr_a[i][j] = a[i][j];
		}
	}
	
	for(i=0;i<k;i++){
		for(j=0;j<n;j++){
			arr_b[i][j] = b[i][j];
		}
	}
	
	
	mul (arr_a,arr_b,arr_c,m,k,n);
//	printf("%d\n",arr_b[2][2]);
//	
	for(i=0;i<m;i++){
		for(j=0;j<n;j++){
			printf("c[%d][%d]=%d\n",i,j,arr_c[i][j]);
		}
	}
		
	
	free(arr_a);
	free(arr_b);
	free(arr_c);
	for (i=0;i<m;i++){
		free(arr_a[i]);
		free(arr_c[i]);
	}
	for (i=0;i<k;i++){
		free(arr_b[i]);
	}
	
	
	return 0 ;
}