Why do I get a warning every time I use malloc?

Question

If I use malloc in my code:

int *x = malloc(sizeof(int));

I get this warning from gcc:

new.c:7: w         


        

Answer 1

You need to include the header file that declares the function, for example:

#include 

If you don't include this header file, the function is not known to the compiler. So it sees it as undeclared.