Untitled

#include <iostream>
#include <windows.h>



using namespace std;

class cCounter {
  public:
    cCounter(int _v) : counter(_v) {
        if((_v < 0) || (_v > 999))
            std::cout << "Wrong number\n";
    }


    cCounter() {
        this->counter = 0;
    }
    void add() {
        counter++;
        if(counter > 999)
            counter = 0;
    }

    void reset() {
        counter = 0;
    }

    int get() {
        return counter;
    }

  private:
    int counter;
};

int main() {
    SetConsoleCP(1251);
	SetConsoleOutputCP(1251);
    setlocale(0, "");
    int n;
    cout << "Enter the meter reading : ";
    cin >> n;

    cCounter counter(n);

    while(true) {
        char opt;
        cout << "Enter +, c, 1 or e to exit: ";
        cin >> opt;

        switch(opt) {
        case '+':
            counter.add();
            break;

        case 'c':
            counter.reset();
            break;

        case '1':
            cout << "meter readings " << counter.get() << "\n";
            break;

        case 'e':
            return 0;

        default:
            cout << "Incorrect character!\n";
        }
    }

    return 0;
}