int n, nplus1;
int x = 0X1;
if( n % 2 == 0 ) nplus1 = n | x;
else nplus1 = 2 * (int)ceil((double)n/2.0);
int x = 0X1;
if( n % 2 == 0 ) nplus1 = n | x;
else nplus1 = 2 * (int)ceil((double)n/2.0);