#include <iostream.h>
#include <stdio.h>
#include <string.h>

#define FLUSH while(getchar() != '\n')

void programUtama() {
    cout << "Program Utama\n\n";

    /*
        TULIS PROGRAM UTAMA ANDA DI SINI
    */
}

int main() {
    char *username = "123",
        *password = "123",
        input_username[100], input_password[100];

    int coba = 0;

    do {
        cout << "Masukkan username: ";
        cin >> input_username;

        FLUSH; // FLUSH BUFFER

        cout << "Masukkan password: ";
        cin >> input_password;

        FLUSH; // FLUSH BUFFER

        if(strcmp(input_username, username) == 0 && strcmp(input_password, password) == 0) {
            cout << "Login Berhasil\n\n";

            programUtama(); // <<-- JALANKAN PROGRAM UTAMA JIKA LOGIN BERHASIL

            return 0; // <<-- KELUAR DARI LOOPING DAN PROGRAM
        }

        cout << "\n====================================\n";
        cout << "Maaf USERNAME & PASSWORD ANDA Salah!\n";
        cout << "====================================\n\n";

        coba += 1;
    } while(coba < 3); // ULANGI MEMASUKKAN USERNAME DAN PASSWORD SAMPAI 3X JIKA TERJADI KESALAHAN

    cout << "Anda Telah 3x Memasukan ID & PASSWORD Yang Salah\n";
    cout << "Mohon Maaf kesempatan Anda hanya 3x ";

    return 0;
}