C / C++ / MFC

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

int main ()
{

 
HKEY hKey;



LPCTSTR sk = TEXT("SYSTEM\\CurrentControlSet\\Control\\Power");

LONG openRes = RegOpenKeyEx(HKEY_LOCAL_MACHINE, sk, 0, KEY_ALL_ACCESS , &hKey);

if (openRes==ERROR_SUCCESS) {
    printf("Success opening key.");
} else {
    printf("Error opening key.");
}

LPCTSTR value = TEXT("HibernateEnabled");
LPCTSTR data = L"0\0";


LONG setRes = RegSetValueEx (hKey, value, 0, REG_DWORD, (LPBYTE)data, 1);



if (setRes == ERROR_SUCCESS) {
    printf("Success writing to Registry.");
} else {
    printf("Error writing to Registry.");
}
cout << setRes << endl;

LONG closeOut = RegCloseKey(hKey);
if (closeOut == ERROR_SUCCESS) {
    printf("Success closing key.");
} else {
    printf("Error closing key.");
}
cin.get();
}

LPTSTR lpszDeviceName = 0;
lpszDeviceName = new TCHAR[ 256];
DWORD dwcchBuff = MAX_PATH;
DWORD dwResult = 0;
dwResult = WNetGetConnection( _T("Z:"),  lpszDeviceName, &dwcchBuff );
if( NO_ERROR != dwResult )
{
   printf("Media removed\n");
}
else
{
   printf("Media inserted\n");
}

for( int i = 0; i<100; i++ ) {
    double f1 = (int)(i/20);
    double f2 = 3.1415*i;
    double f3 = 3.1415*(f2+3);
    cout.width( 10 );
    cout.precision( 4 );
    cout << std::left << f1 << " ";
    cout.width( 10 );
    cout << std::left << f2 << " ";
    cout.width( 10 );
    cout << std::left << f3 << endl;
}