two dimensional array in c multiplication code example

Example 1: how to declare multidimensional array in c

int a[3][4] = {  
   {0, 1, 2, 3} ,   /*  initializers for row indexed by 0 */
   {4, 5, 6, 7} ,   /*  initializers for row indexed by 1 */
   {8, 9, 10, 11}   /*  initializers for row indexed by 2 */
};

Example 2: how to do matrix multiplication in c

double[][] c = new double[N][N];
for (int i = 0; i < N; i++)
{
 for (int j = 0; j < N; j++)
 	{
 for (int k = 0; k < N; k++)
 		{
		 c[i][j] += a[i][k] * b[k][j];
 		}
 	}
}