pobieranie dokładnego czasu

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

using namespace std;
int main()
{
    SYSTEMTIME SystemTime;
   
    GetSystemTime( & SystemTime );
    cout << SystemTime.wHour << endl;
    cout << SystemTime.wMinute << endl;
    cout << SystemTime.wSecond << endl;
    cout << SystemTime.wMilliseconds << endl;
   
    cout << SystemTime.wYear << endl;
    cout << SystemTime.wDay << endl;
    cout << SystemTime.wMonth << endl;
    cout << SystemTime.wDayOfWeek << endl;
   
   
    GetLocalTime( & SystemTime );
    cout << SystemTime.wHour << endl;
    cout << SystemTime.wMinute << endl;
    cout << SystemTime.wSecond << endl;
    cout << SystemTime.wMilliseconds << endl;
   
    cout << SystemTime.wYear << endl;
    cout << SystemTime.wDay << endl;
    cout << SystemTime.wMonth << endl;
    cout << SystemTime.wDayOfWeek << endl;
   
    getchar();
    return 0;
}

//losowanie
czas = clock();
cin >> zgadnieta;
czy_dobrze();
while( znaki[ losowanie ] != zgadnieta )
{
    cout << "Niesety, zly klawisz!" << endl;
    cin >> zgadnieta;
    czy_dobrze();
}
if( znaki[ losowanie ] == zgadnieta )
{
    czas2 = clock();
    cout << "Brawo! Twoj czas to: " << difftime( czas2, czas ) / 1000 << " sekundy" << endl;
    getch();
}