main.cpp

#include <iostream>
#include "TV.h"

using namespace std;

int main() {
	TV t;
	int choice;
	do {
		t.show_obj ();
		cout << endl;
		cout << 1 << "On/Off" << endl;
		cout << 2 << "Setup" << endl;
		cout << 3 << "Channel up" << endl;
		cout << 4 << "Channel down" << endl;
		cout << 5 << "Volume up" << endl;
		cout << 6 << "Volume down" << endl;
		cout << 7 << "Exit" << endl;
		cin >> choice;
		switch (choice) {
		case 1: t.on_off ();
			break;
		case 2: t.setup_tv ();
			break;
		case 3: t.chan_up ();
			break;
		case 4: t.chan_down ();
			break;
		case 5: t.vol_up ();
			break;
		case 6: t.vol_down ();
		}
	}
	while (choice!=7);
	return 0;
}

TV.cpp

#include "TV.h"
#include <iostream>

using namespace std;



TV::TV()
{
    is_on = 0;
    chan = 0;
    volume = 0;
    chan_count = 0;
}
TV::TV( int new_on,
    int new_chan,
    int new_volume,
    int new_chan_count)
{
    is_on = new_on;
    chan = new_chan;
    volume = new_volume;
    chan_count = new_chan_count;
}
TV::~TV()

{
}

void TV::on_off()
{
    is_on=!is_on;
}

void TV::vol_up()
{
   if (volume <= 100) {
    volume++;
   }
}
void TV::vol_down()
{
    if (volume > 0 ) {
       volume--;
    }
}

void TV::setup_tv()
{
    chan_count = 3 + rand() % 10;
}

void TV::chan_up()
{

    if (chan_count == 0) {
        return;
    }
    if (chan == chan_count) {
        chan = 0;
    }
    else {
        chan++;
    }

}
void TV::chan_down()
{

     if (chan_count == 0) {
        return;
    }
    if (chan == 0) {
        chan = chan_count
    }
    else {
        chan--;
    }
}

TV.h

#ifndef TV_H
#define TV_H

class TV

{

public:
    TV();
    virtual ~TV();
    void on_off();
    void chan_up();
    void chan_down();
    void vol_up();
    void vol_down();
    void setup_tv();
    void show_ob

private:

    int is_on;
    int chan;
    int volume;
    int chan_count;
};

#endif