Sep 18, 2014 · First check (or double-check) the documentation and comments related to AnotherStruct, possibly ask those who made it if they are available, to find out if there is an …

That address is never NULL, so the test is always false and your "empty" check never triggers. Instead of trying to infer emptiness by peeking at every field, design your data so you can …

Structures Structures (also called structs) are a way to group several related variables into one place. Each variable in the structure is known as a member of the structure. Unlike an array, a …

With the null check in place, you can perform proper error handling and recover gracefully - correct the problem yourself, abort the current operation, write a log entry, notify the user, …

Jan 6, 2024 · Because members of incomplete type are not allowed, and a struct type is not complete until the end of the definition, a struct cannot have a member of its own type.

Nov 2, 2011 · That's an int, not a pointer, so it doesn't make much sense to compare it to NULL. If you want to be able to do that, then you need to declare it in the struct as an int*.

May 24, 2015 · So I want to check if my struct is empty or not. I declare my struct as a variable but DO not allocate memory. Later on I want to check with an if statement whether my struct is …

Mar 15, 2014 · You can have a pointer to a struct inside the struct itself, but you can't have the actual struct inside the struct itself. What you're doing is perfectly legal, because you're using …

Sep 24, 2009 · Probably the best way to do this is to put a default constructor on your Test struct (you can do this in C++, but not C). Something like: int x; A() : x(0) { } will do the job just fine. …

Feb 26, 2013 · One way of doing this is to have an "ok" field in the struct that you could set in the init function, and that you could check in the caller. Another way is to rewrite your code so that …