resolve timer logic [closed]

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i did fastforward in music player by getting current time of the player (30 sec forward)

if(sec>=maxsec && min>=maxmin && hour>=maxhour)
      {
        next_buttonclick(null);

      }
    else 
    {
        sec=sec+30;
         if(sec>=60)
         {
          sec=sec%60;
          min=min+1;
             if(min>=60)
             {
                 min=min%60;
 开发者_开发知识库                hour=hour+1;                
             }

         }

max is the time duration of media..

when i run this, it not working properly.. plz fix bug free..

also reverse

if(sec<=0 && min<=0 && hour<=0)
    {
        back_buttonclick(null);

    }
    else 
    {
        gettimeduration();
        sec=sec-30;
         if(sec<0)
         {
             sec=60+sec;
             min=min-1;
             if(min<0)
             {
                 min=60+sec;
                 hour=hour-1;

             }

         }

thanks in advance..

---

I think the condition

(sec>=maxsec && min>=maxmin && hour>=maxhour)

doesn't do what you think it should.
Imagine that maxsec is 30; maxmin is 6, and maxhour is 0. And let's say sec is 17, min is 8, and hour is 0. So the maxtime is 6 and a half minutes and the current time is 8 minutes and 17 seconds.

17 >= 30 FALSE and the whole condition becomes false

The best thing to do when comparing times is to convert to seconds and compare just the seconds

(sec + min*60 + hour*3600 >= maxsec + maxmin*60 + maxhour*3600)