Alarm C++

#include <iostream>
#include <ctime>
#include <cstdlib>
using namespace std;

int main() {
    time_t rawtime;
    int alarmtime;
    rawtime = time(NULL);
    cout << rawtime << endl;
    cin >> alarmtime;
    while(rawtime<alarmtime) {
        rawtime = time(NULL);
        cout << rawtime << endl;
        system("CLS");
    }
    for(int i = 1; i <= 1000; i++) { cout << "\a \a \a" << endl; }
    return 0;
}