[Solved] C – can’t access global variable within user functions

Question

The variable used is a duplicated name. In main the local used is accessed. But in checkData the global instance is used, but causes an error since you are dereferencing a NULL pointer (static variables are initialised to 0).

Accepted Answer

The variable used is a duplicated name. In main the local used is accessed. But in checkData the global instance is used, but causes an error since you are dereferencing a NULL pointer (static variables are initialised to 0).