Doubts with return(value)

[cadbilbao]

Hi!

I'm developing a program, formed by several subrutines.

If the returned value from program is zero, proccess went OK. I want to return program errors from subrutines inside program, but these 'return's are only for the subrutines, not for my program.

**I want to know the way to return program errors from the subrutines inside this prgram***.

Thank you very much.

 

[DavesTips]

You have a few options. It depends whether your functions return some value. If not you can just return say a bool true or false to indicate that all is OK (or not).

bool myfunc(int i)
{
if (error) return false;
return true;
}

if (myfunc(21))
{
// Call OK
}

If they do, is there an "invalid value" you can return when something goes wrong. If so check for this value after calling the routine. However if a routine returns an int for example and any int is valid there is no way to indicate an error. Then you have two options: either return your value with a reference parameter (or pointer) and have the return value a bool:

bool myfunc(int& i)
{
if (error) return false;

i = someresult;
return true;
}

int k = 21;
if (myfunc(k))
{
// Call OK k = result
}

Or use exceptions (really the recommended method anyway).

 

[Zyrenthian]

You could also use exception handling with try catch statements.

Matt