This function subtracts B [ ] [ ] from A [ ] [ ] , and stores the result in C [ ] [ ]
public static void subtract ( int [ ] [ ] A , int [ ] [ ] B , int [ , ] C ) { int i , j ; for ( i = 0 ; i < N ; i ++ ) { for ( j = 0 ; j < N ; j ++ ) { C [ i , j ] = A [ i ] [ j ] - B [ i ] [ j ] ; } } }