C++ Error handler

[codder]

Hello,

I want to know what are the best ways to deal with errors.
Basically I want to stop running the application.

For example:

void foo()
{
int a = 0;
if (a != true)
myErrorHandler::postMessage("a variable it's not true");
}

Something like that

[Peter87]

You can throw an exception.

[MiiNiPaa]

throw an exception. If it will be left unhandled it will stop your programm.
And if it isn't a critical error, you can catch it and deal with it.