Do NOT always check for NULL! (C++)This tip submitted by Kevin Lam on 2005-01-24 16:44:13. It has been viewed 61717 times.Rating of 5.6 with 292 votes First of all, please note that this applies only to C++. Do NOT check for NULL when allocating memory with new, since new will never return NULL! More information can be found here: C++ FAQ Lite As well, if you have: int *x = new int; ... if(x != NULL) delete x; That is bad! The language guarantees that if delete is used on a pointer that is NULL, nothing will happen. So instead of testing for NULL (and therefore slowing down your program needlessly), you should just do: int *x = new int; ... delete x; //Doesn't matter if it's NULL! [This tip was originally posted in response to a mistake in an earlier tip, which has since been corrected.] More tips Help your fellow programmers! Add a tip! |