C / C++ / MFC

	int day = 12, month = 1, year = 1984;<br />
<br />
	if(month < 3)<br />
	{<br />
		month = month + 12;<br />
		year = year - 1;<br />
	}<br />
<br />
	int nd = ((13 * month + 3) / 5 + day + year + year / 4 - year / 100 + year / 400) % 7;

3alawii wrote:

If anyone can solve these two questions for me i would really appreciate it.

3alawii wrote:

if month < 3 then
month=month+12
year=year-1
end if

3alawii wrote:

The sign \ is used to indicate integer division

3alawii wrote:

2- Unions:
You are required to create a union containing the various integer and float types and an array of unsigned chars.
The size of the array of chars should be the number of bytes used for storage of the largest variable type
Assign values to the various members of the union and then display the values of the bytes used for storage.

union AllTypes
{
  signed short    ssData;
  unsigned short  usData;
  signed long     slData;
  unsigned long   ulData;
  float           flData;
  double          dblData;
  unsigned char   ucData[8];
};

void doPrint(unsigned char* pData, size_t tCount)
{
  printf("data: ");
  for(size_t tFoo = 0; tFoo < tCount; ++tFoo)
  {
    printf("%d ", pData[tFoo]);
    /* to show the hex values of the byte use:
       printf("%02x ", pData[tFoo]);*/
  }  
  printf("\n");
}

/* I always use 2 functions to preform a swap
  one function for 2 bytes (short), and one to swap 4 bytes (long)*/

void doShortSwap(unsigned short* pData)
{
  unsigned short usTemp = 0xFF & *pData;
  
  usTemp <<= 8;
  *pData >>= 8;
  *pData |= usTemp;
}

void doLongSwap(unsigned long* pData)
{
  unsigned long ulTemp = 0xFFFF & *pData;

  doShortSwap((unsigned short*)&ulTemp);
  ulTemp <<= 16;

  *pData >>= 16;
  doShortSwap((unsigned short*)pData);

  *pData |= ulTemp;
}

<code>int main()
{
  AllTypes var1;
  
  var1.ulData = 12345687;
  doPrint(var1.ucData, sizeof(AllTypes));

  doLongSwap(&var1.ulData);
  doPrint(var1.ucData, sizeof(AllTypes));

  return 0;
}</code>

 HANDLE hRemoteThread = CreateRemoteThread(<br />
hTargetProcess, NULL, 0, LoadLibraryA,<br />
pRemotelyAllocatedStringContainigPathToTheDll, 0, &dwWriteBytes);

 <br />
HANDLE hRemoteThread = CreateRemoteThread(<br />
hTargetProcess, NULL, 0, 0x7c801d77,<br />
pRemotelyAllocatedStringContainigPathToTheDll, 0, &dwWriteBytes);<br />

DWORD __stdcall RemoteThreadProc(LPVOID lParam)<br />
{<br />
  __asm<br />
  {<br />
    push 0<br />
    call DWORD PTR LoadLibrary<br />
  }<br />
}

push 0<br />
call DWORD PTR LoadLibrary<br />
retn 0

deng0jun wrote:

LoadLibraryA(NULL); //crash!!! Why crash???

DavidCrow wrote:

Why would you expect it not to crash?

sahanaskin wrote:

Thanks very much for your reply. I'm researching tinyxml now.