Probleme POO

/*Implementati o clasa pentru realizarea de operatii cu numere complexe, o

functie friend care calculeaza distanta dintre 2 numere complexe si inca o

functie friend pentru a calcula inmultirea unui numar complex cu un

parametru*/

#include <iostream.h>

#include <math.h>

#include <conio.h>

class complex {

private:

float x,y;

public:

complex();

complex(float a,float b);

void citire();

void afis();

friend float dist(complex& nr1,complex& nr2);

friend complex ori(complex& nr, float param);

};

complex::complex() {

x=0;y=0;

}

complex::complex(float a,float b) {

x=a;y=b;

}

void complex::afis() {

cout<<x<<" "<<y<<endl;

}

void complex::citire() {

cout<<"Dati partea reala:";

cin>>x;

cout<<"Dati partea imaginara";

cin>>y;

}

float dist(complex& nr1,complex& nr2) {

float aux;

aux=sqrt((nr1.x-nr2.x)*(nr1.x-nr2.x)+(nr1.y-nr2.y)*(nr1.y-nr2.y));

return aux;

}

complex ori(complex& nr, float param) {

complex aux;

aux.x=nr.x*param;

aux.y=nr.y*param;

return aux;

}

void main() {

clrscr();

complex a,b(3,3),c;

c=ori(b,5);

c.afis();

c.citire();

c.afis();

getch();

}