static float frobeniusNorm ( int mat [ ] [ ] ) {
  int sumSq = 0 ;
  for ( int i = 0 ;
  i < row ;
  i ++ ) {
    for ( int j = 0 ;
    j < col ;
    j ++ ) {
      sumSq += ( int ) Math . pow ( mat [ i ] [ j ] , 2 ) ;
    }
  }
  float res = ( float ) Math . sqrt ( sumSq ) ;
  return res ;
}

static float frobeniusNorm ( int mat [ ] [ ] ) { int sumSq = 0 ; for ( int i = 0 ; i < row ; i ++ ) { for ( int j = 0 ; j < col ; j ++ ) { sumSq += ( int ) Math . pow ( mat [ i ] [ j ] , 2 ) ; } } float res = ( float ) Math . sqrt ( sumSq ) ; return res ; }
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