#define Round( x ) ( ( x ) >= 0 ? ( int ) ( ( x ) + 0.5 ) : ( int ) ( ( x ) - 0.5 ) )

int main ( void )
 {
  int   ix, iy;
  float fx =  1.85;
  float fy = -1.85;

  ix = ( int ) ( fx );  //遵循1
  ix = Round ( fx );    //遵循2
  iy = ( int ) ( fy );  //遵循3
  iy = Round ( fy );    //遵循4

  return ( 0 );
}