C: correct usage of strtok_r

Question

How can I use strtok_r instead of strtok to do this?

char *pchE = strtok(NULL, \" \");

Now I\'m trying to use strtok_r properl

Answer 1

char str[]="string for sample";
char *reserve;
char *pchE = strtok_r(str, " ", &reserve);//when next call str -> NULL