Initialize the every row with size 2 ( 1 for numerator and 2 for denominator )
for ( int i = 0 ; i < size ; i ++ ) arr [ i ] = new int [ 2 ] ; arr [ 0 ] [ 0 ] = 9 ; arr [ 0 ] [ 1 ] = 10 ; arr [ 1 ] [ 0 ] = 12 ; arr [ 1 ] [ 1 ] = 25 ; arr [ 2 ] [ 0 ] = 18 ; arr [ 2 ] [ 1 ] = 35 ; arr [ 3 ] [ 0 ] = 21 ; arr [ 3 ] [ 1 ] = 40 ;