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goto label question

 
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Chubbs



Joined: 02 May 2005
Posts: 14

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goto label question
PostPosted: Thu May 19, 2005 7:47 pm     Reply with quote
Can the
Code:
goto label;
label:

only be used in the same function?

If so is there any way you could skip from one bit of code to another?
I wanted to jump back to a point in a while loop from a function that is called from within the loop:


Code:
while
{
...
...
label:
...
...
function;
}

function()
{
...
...
goto label;
}

Obvoiusly this does not work, is there a way of doing this??
Thanks.
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Thu May 19, 2005 8:26 pm     Reply with quote
Here are some examples of doing it by normal methods:

// This method uses a goto statement.
Code:

void main()
{
char c;

while
  {
   c = 0x55;

label:
   result = function();
   if(result == ERROR_CODE_5)
      goto label;
  }

//==================
function()
{

return(ERROR_CODE_5);
}



This method uses an inner while() loop and the continue statement.
Code:
void main()
{
char c;

while
  {
   c = 0x55;

   while(1)
     {
      result = function();
      if(result == ERROR_CODE_5)
         continue;   // Go to the start of the inner while() loop   
     }
     
  }

//----------------
function()
{

return(ERROR_CODE_5);
}
Chubbs



Joined: 02 May 2005
Posts: 14

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PostPosted: Thu May 19, 2005 11:18 pm     Reply with quote
Thanks once again, I was able to successfully use it in my program.
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