why it is not giving output in c/c++? :     #include<stdio.h>
/*I want to find pairs with given sum such that elements of pair are in different rows.*/

    int main()
    {
	int a[5][5]={{-1,2,3,4},
	             {5,3,-2,1},
	             {6,7,2,-3},
	             {2,9,1,4},
				 {2,1,-2,0}};
				 int sum=11;
				 int i,j;
				 for(i=0;i<5;i++)
				 {
				 	for(j=0;j<5;j++)
				 	{
				 		if(a[i][j]+a[j][i]==sum && i!=j)
				 		{
				 		printf("%d %d\n",i,j);
				 	}
					 }
				 }
    }