Question

I have the compiler complaining (warning) about the folowing.

Am I missing something? Because I thought this didn’t need a cast

char* CurrentCh  = some ptr value;
int size;

size = func(&CurrentCh);

with func defined like this

int func(void** ptr);

Compiler warning:

passing argument 1 of ‘func’
from incompatible pointer type

Thx

Answer 1

In C you can pass any pointer type to a function that expects a void*. What it says is “I need a pointer to something, it doesn’t matter what it points to”. Whereas void** says “I need a pointer to a void*, not a pointer to another pointer type”.