You are talking about pointer variables.

Integer variables, floating-point variables, character variables, pointer variables. Through the naming law, we know the storage address of pointer variables.

Pointer variables have the same usage and scope as other variables. Pointer variables defined in Zi Han are local variables, and other functions cannot be used.

Don't think too complicated about pointer variables. Address (pointer) is also data, which is no different from other character data and plastic data.

Of course, pointer variables of global variables can of course be used with multiple functions.

Definition of pointer: address.

Definition of pointer variable: a variable that stores pointers.