int comp ( int data1, int data2 );  //遵循1

int main ( void )
{
  int v, d, h;

  v = 10;
  d = 20;
  h = comp ( v, d );

  return ( 0 );
}

int comp ( int data1, int data2 )   //遵循2
{
  int data;

  data = 2 * data1 + data2;
  
  return data;
}