Nooby question about free

[vFreeman]

Hi ,

can free function be used without malloc?

That is ,

Student *ptr = stdList->head ;
...
free(ptr);

the code above is correct?

[TwilightSpectre]

You cannot free memory that has been dynamically allocated with malloc. That staed, if you have allocated previously in your program stdList->head with malloc(), freeing ptr should work fine (just remember not to reference stdList->head anymore)

[tipaye]

@NT3

You cannot free memory that has been dynamically allocated with malloc.

Did you mean

You cannot free memory that has not been dynamically allocated with malloc?

:)

Also maybe set ptr = nullptr after free, but as pointed out above, Murphy's law guarantees that someone's going to try and use stdList->head and cause an access violation.

[N36fSL3A]

I'm assuming that he's using C since he referenced C functions, and nullptr doesn't exist in C from my knowledge.