alive.c

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#include <windows.h>
#include <stdlib.h>
 
HANDLE  StandardOutput = INVALID_HANDLE_VALUE;
CHAR    Message [80];
DWORD   CharactersToWrite = 0;
DWORD   WrittenCharacters = 0;
INT d = 0, h = 0, m = 0, s = 0;
 
int
main (int argc, char * argv [])
{
    StandardOutput = GetStdHandle (STD_OUTPUT_HANDLE);
    if (INVALID_HANDLE_VALUE == StandardOutput)
    {
        return (EXIT_FAILURE);
    }
    while (TRUE)
    {
        /* Prepare the message and update it */
        CharactersToWrite =
            wsprintf (
                Message,
                "Alive for %dd %dh %d' %d\"   \r",
                d, h, m, s
                );
        WriteConsole (
            StandardOutput,
            Message,
            CharactersToWrite,
            & WrittenCharacters,
            NULL
            );
        /* suspend the execution for 1s */
        Sleep (1000);
        /* increment seconds */
        ++ s;
        if (60 == s) { s = 0; ++ m; }
        if (60 == m) { m = 0; ++ h; }
        if (24 == h) { h = 0; ++ d; }
    }
    return (EXIT_SUCCESS);
}
 
/* EOF */