Exercice 47 coordonnées tridimensionnelles 110

//Exercice 47 coordonnées tridimensionnelles 110
#include <iostream>
#include <string>
using namespace std;
//----------------------------------------------------------------------
class Point3D{
    public:
    Point3D(float x=1,float y=1,float z=1);
    ostream& affiche (ostream& stream);
    bool compare(Point3D const &p);

    private :
    float x,y,z;
};
//----------------------------------------------------------------------
//----------------------------------------------------------------------
    Point3D::Point3D(float x,float y,float z):x(x),y(y),z(x){}

    ostream&  Point3D::affiche (ostream& stream){
         stream <<"( "<<x<<" , "<<y<<" , "<<z<<" )"<<endl;
         return stream;
    }

    bool Point3D::compare(Point3D const &p){
        if (p.x==x && p.y==y && p.z==z){return true;}
        return false;
    }

    ostream& operator <<(ostream& os ,Point3D p){
        return p.affiche(os);
    }
//----------------------------------------------------------------------
int main(){
    Point3D A, B(2,1,1), C(1,1,1); //Trois points

    cout<<A<<B<<C<<endl;//Affiche les trois points
    cout<<A.compare(B)<<endl;//Compare A avec B
    cout<<A.compare(C)<<endl;//et A avec C

return 0;
}