C / C++ / MFC

not insane yet! wrote:

what's the use of this in a code of programs?
i'm just asking because it was used in the code of magic square..

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

ashira khera wrote:

...only half of the file can be in memory and the other part in buffer...

void main( void )
{
    char szBuffer[] = "ABCDEFGHIJKLMNOPQRS"; // some buffer to reverse
    char *psTemp;
    int  x,
         y;
 
    // create temporary buffer to hold half
    psTemp = new char[strlen(szBuffer) / 2];
 
    // store first half in temporary buffer (memcpy would be quicker)
    for (x = 0; x < 10; x++)
        psTemp[x] = szBuffer[x];
 
    // overwrite second half with 'reversed' first half
    for (y = 0, x = strlen(szBuffer) - 1; x >= strlen(szBuffer) / 2; x--, y++)
    {
        char c      = szBuffer[x];
        szBuffer[x] = psTemp[y];
        psTemp[y]   = c;
    }
 
    // overwrite first half with 'reversed' second half (use memcpy)
    for (x = 0; x < strlen(szBuffer) / 2; x++)
        szBuffer[x] = psTemp[x];
}

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

unsigned year = 1999;
unsigned century_part = year / 100;
unsigned other_part = year % 100;