Classes and inheritance - c++

Question

I am new to OOP and I have encountered a problem while writing my first code. I do not understand why I can not use one class as a part of another. And no I do not want that class to inherit another. One of the requirements is that I prevent object copying.
#pragma once
#include<iostream>
#include<string>
using namespace std;
class Pilot
{
public:
Pilot(/*string x*/)
{
setName();
flight_hours = 0;
set_status(0);
}
void setName(/*string x*/)
{
cout<<"Unesi ime pilota: ";
getline(cin,name);
}
string getName()
{
return name;
}
void increase_flight_hours(int n)
{
flight_hours += n;
}
int get_flight_hours()
{
return flight_hours;
}
void set_status(bool b)
{
status;
}
bool get_status()
{
return status;
}
void display_pilot()
{
cout << name;
cout << "(", flight_hours, ")";
if (status)
cout << "-L" << endl;
else
cout << "-N" << endl;
}
Pilot (const Pilot&) = delete;
void operator=(const Pilot&) = delete;
private:
string name;
int flight_hours;
bool status;
};
#pragma once
#include"Pilot.h"
class Avion
{
public:
Avion ()
{
setName();
set_capacity();
}
void setName(/*string x*/)
{
cout << "Unesi ime aviona: ";
getline(cin, name);
}
string getName()
{
return name;
}
void set_capacity()
{
cout << "Unesite kapacitet aviona: ";
cin >> capacity;
}
int get_capacity()
{
return capacity;
}
Pilot get_captain()
{
return captain;
}
private:
string name;
Pilot captain;
Pilot copilot;
int capacity;
};
I get this error :
function "Pilot::Pilot(const Pilot &)" (declared at line 50 of "C:\Users\mjova\source\repos\Project1\Project1\Pilot.h") cannot be referenced -- it is a deleted function Project1 C:\Users\mjova\source\repos\Project1\Project1\Planes.h 36

Answer 1

One problem is here:
Pilot get_captain()
{
return captain;
}
which returns a copy of the captain, and you have expressly disallowed copying.
Return a const reference instead:
const Pilot& get_captain()
{
return captain;
}
(and don't try to copy what it returns).
There could also be some other copying-related code in "Planes.h"; it's not clear whether Avion is defined in that file or not.
Side note: since you can't copy Pilots, the captain and copilot members of Avion are problematic (you can't implement set_captain, for instance).
I suspect that you're going to want to change them to be pointers in the future, and let pilots exist without planes and vice versa.