Cprogramkarneval

#pragma once
#include <iostream>
#include <cstring>
using namespace std;
class karneval {
private:
    char name_carneval[30];
    int number_home_groups;
    int number_foreign_groups;
    int sum;
public:
    karneval() : number_home_groups(0),
                 number_foreign_groups(0),
                 sum(0)
    {
        strcpy(name_carneval, "");
    }

    void input();
    int number_of_groups();
};
void karneval :: input() {
    cout << "Input number home groups" << endl;
    cin >> number_home_groups;
    cout << "input number_foreign_groups" << endl;
    cin >> number_foreign_groups;
}
int karneval:: number_of_groups() {
    sum = number_home_groupa + number_foreign_groups;
    cout << "Suma je:" << sum << endl;
    return sum;
}
class djecja_reduta:public karneval {
private:
    char event_place[30];
    int date_of_event;
public:
    void  number_of_groups();
    void output();
    void input()
};
void djecja_reduta::input() {
    cout << "Unesite mjesto odrzavanja" << endl;
    cin.ignore();
    cin.getline(event_place, 30);
    cout << "Unesite datum odrzavanj" << endl;
    cin >> date_of_event;
}
void djecja_reduta:: number_of_groups(){
    karneval karneval;
    karneval.number_of_groups();
}
void djecja_reduta::ispis() {
    cout << "event place: " << event_place << endl;
    cout << "date of event: " << date_of_event << endl;
}