14_Array- Multiplication of 2D matrix.c

#include<stdio.h>
#include<conio.h>
int main()
{
	int a[][3]=
	{
		{1,2,3},
		{4,5,6},
		{7,8,9}
	};
	
	int b[][3]=
	{
		{2,1,3},
		{1,4,6},
		{3,5,7}
	};
	int c[3][3],sum=0,i,j,j1;
	
	for(i=0;i<3;i++) // Outermost loop for traversing the rows of first matrix
	{
		for(j=0;j<3;j++) // Middle loop for traversing column of second matrix
		{
			for(j1=0;j1<3;j1++) // innermost loop for traversing the column of the first matrx and row of 2nd matrix
			{
				sum=sum+ a[i][j1]*b[j1][j];
			} // end of inner most loop
			c[i][j]=sum;
			sum=0; //reinitialisation
		} // end of middle loop
	} // End of outer most loop
	
	for(i=0;i<3;i++)
	{
		for(j=0;j<3;j++)
		{
			printf("%d\t",c[i][j]);
		}
		printf("\n");
	}
	
	return 0;
	
}