应用题
#include < iostream, h >
class point
{
private : float x, y ;
public : f( float a, float b) { x = a ; y = b ; }
f( ) {x=O;y=O;}
void getx( ) { cout < < x < < endl; }
void gety ( ) { cout < < y < < endl ; }
}
class pointl
}
private : float x, y ;
public : f( float a, float b) { x = a; y = b ; }
f( ){x=l;y=l;}
void getx( ) {cout <