#include <iostream>
#include <windows.h>
using namespace std;

void shop();

void tablitsa();

void fibonacci();

int main(){
    int menu;

    while (1){
        cout << "Select of menu item: \n";
        cout << " 1 - Table \n 2 - Shop \n 3 - Fibonacci numbers\n 4 - Exit\n";
        cout << ">>";
        cin >> menu;

        switch(menu){
            case 1: system("cls"); tablitsa(); cout << "\n\n"; break;
            case 2: system("cls"); shop(); cout << "\n\n"; break;
            case 3: system("cls"); fibonacci(); cout << "\n\n"; break;
            case 4: return 0;
            default: cout << "Wrong number\n";
        }
    }
    return 0;
}

void fibonacci(){
    int N;
    cout << "Enter the numbers of Fibonacci numbers: ";
    cin >> N;

    int F[N];

    F[0] = 0;
    F[1] = 1;

    for (int i = 0; i<N; i++){
        F[i+2] = F[i] + F[i+1];
        cout << F[i] << " ";
    }
}

void tablitsa(){
    int levo=0;


    while (levo <= 1 || levo >= 9) {
        cout << "Enter the left number: ";
        cin >> levo;
        if (levo >= 1 && levo <= 9) {
            for (int i = 1; i < 11; i++) {
                cout << levo << "X" << i << " = " << levo * i << endl;
            }
            break;
        }
    }
}

void shop(){
    double i = 1, summ = 0, summ1 = 0, su = 0;

    while (i==1) {
        cout << "Enter your summ: ";
        cin >> summ;

        if (summ >= 3000) {
            summ1 = summ / 100 * 20;
            summ1 = summ - summ1;
            cout << "You have to pay " << summ1 << endl;
            su += summ1;
        }
        else {
            if (summ >= 1000) {
                summ1 = summ / 100 * 10;
                summ1 = summ - summ1;
                cout << "You have to pay " << summ1 << endl;
                su += summ1;
            }
            else {
                summ1 = summ - summ1;
                cout << "You have to pay " << summ << endl;
                su += summ;
            }
        }

        cout << "Press '1' if someone here" << endl;
        cin >> i;
    }
    cout << "Total on the day: " << su << endl;
}