Исправить ошибки в коде

#include <iostream.h>
class transport
{
int probig;
int speed;
public:
int GetProbig() {return probig;}
int GetSpeed() {return speed;}
void SetProbig(int p) {probig=p;}
void SetSpeed(int s) {speed=s;}
};
 
class Korabel: public transport
{
int masa;
int vusota;
public:
void SetMasa(int m) {masa=m;}
void SetVusota(int v) {vusota=v;}
int GetMasa() {return masa;}
int GetVusota() {return vusota;}
Korabel() {
cout<<"default constructor!\n";
SetProbig(1200); SetSpeed(220);
masa=300; vusota=20;}
Korabel(int m)
{
masa = m;
vusota=10;
}
Korabel(int m, int v)
{
masa=m; vusota = v;
}
friend class choven;
friend void ChangeVusota(Korabel&ob, int sv);
~Korabel() {cout<<"Destructor!\n";}
    int operator++(int) {return++masa;}
    int operator--(int) {return--masa;}
    void operator=(Korabel&ob){
        SetProbig(ob.GetProbig()); SetSpeed(ob.GetSpeed());
    }
    Korabel(const Korabel&ob){
     memcpy (this,&ob,300);
    }
};
 
class choven{
public:
void ChangeMasa(Korabel&ob, int pm) {ob.masa=pm;}
};
 
void ChangeVusota(Korabel&ob, int sv) {ob.vusota=sv;}
 
void main()
{
    Korabel Nevdaha;
    Nevdaha++;
    cout<<"Nevdaha masa:"<<Nevdaha.GetMasa()<<endl;
    Korabel Vdaha=Nevdaha;
    cout<<Vdaha masa:"<<Vdaha.GetMasa()<<endl;
    Nevdaha.GetMasa(1200);
    Korabel psix(Nevdaha);
    cout<<"psix probig:"<<psix.GetProbig();
}