televize.h

#include<iostream>

using namespace std;


class Televize
{
    private:
        int m_kanal;
        bool m_jeZapnuto;

    public:
        Televize();
        void Zapnout();
        void Vypnout();
        void Prepnout(int kanal);
        int Info();
        bool JeZapnuta();
};



Televize::Televize()
{
    m_kanal = -1;
}

bool Televize::JeZapnuta()
{
    return (m_kanal >= 0);
}

void Televize::Zapnout()
{
    if(m_kanal == -1)
        m_kanal = 0;
}

void Televize::Vypnout()
{
    if(m_kanal >= 0)
        m_kanal = -1;
}

int Televize::Info()
{
    return m_kanal;
}

void Televize::Prepnout(int kanal)
{
    m_kanal = kanal;
}