New debounce logic:

this debounce function will be called in input function sorry for not mentioning it.

void main()
{
 signed int deb_Counter=0;
 while(1)
 {
   input();
   process();
   output();
 }
}
void input()
{
 int status=debounce();
}
int debounce()
{

  if(key_pressed)
  {
     deb_Counter++;
  }
  else
  {
     deb_Counter--;
  }
  if(deb_Counter>10)
  {
   deb_Counter=0;
   return(1);
  }
  else
  {
  deb_Counter=0;
  return(0);
  }
}

with thanks,
karthik

this debounce function will be called in input function sorry for not mentioning it.

void main()
{
 signed int deb_Counter=0;
 while(1)
 {
   input();
   process();
   output();
 }
}
void input()
{
 int status=debounce();
}
int debounce()
{

  if(key_pressed)
  {
     deb_Counter++;
  }
  else
  {
     deb_Counter--;
  }
  if(deb_Counter>10)
  {
   deb_Counter=0;
   return(1);
  }
  else
  {
  deb_Counter=0;
  return(0);
  }
}

with thanks,
karthik

Ahhem ...

You've done nothing to fix 'deb_Counter'.

And a glaring logic error ...

In 'debounce' you check for deb_Counter being greater than 10.

If it is, you reset to zero. If it isn't, you reset to zero.

How would it ever manage to get anywhere near 10?

Maybe you should return to first principals before embarking on a task such as this.

because you have no idea what you're doing - sorry.

void input()
{ int status=debounce();
}

and

void main()
{ signed int deb_Counter=0; while(1) {

void input()
{
 int status=debounce();
}

But the input function doesn't do anything with the result!

As Tamir says, you need to set this aside and take a few steps back to actually learn how to program in 'C'.

this code is reffered from web

you have no idea what you're doing

If you do not fully understand code you grab from the web you are, in 99% of the cases, totally screwed.

Erik

PS it is, in my opinion, totally ridiculous not to use a timer for debounce, let alone the total uncertainty of the time a delay written in C takes.