A function to detect if mouse moved in 5 seconds

I want to detect if mouse moved in 5 seconds, if yes time elapsed is showed. Here is my code, it seems ok but doesn't work correctly.

void timer()
{
    if (ismouseclick(WM_开发者_StackOverflowMOUSEMOVE))
    {
        movetime=clock();
        clearmouseclick(WM_MOUSEMOVE);
    }
    if ((clock()-movetime)<6)
    {
        sprintf(time_str,"%d",clock();
        outtextxy(275,483,"Time: ");
        outtextxy(340,483,time_str);
    }
    else
    {
        setfillstyle(1,0);
        bar(275,483,370,500);
    }
}

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Its about clock() function. You need to divide it to CLK_TCK (a constant) if you want seconds.

(clock()/CLK_TCK)

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clock() typically returns the elapsed time in milliseconds (this is OS dependent, so check your OS's documentation), so when you are checking whether (clock() - movetime) < 6, that's not the elapsed time in actual seconds, but most likely milliseconds. Therefore you're probably not seeing the print-out you're expecting (i.e., it probably prints ever time you call timer(), or maybe it doesn't print at all).