Compilare: user.c: In function 'main': user.c:25: warning: implicit declaration of function 'strtok' user.c:25: warning: passing argument 1 of 'atoi' makes pointer from integer without a cast user.c:27: warning: passing argument 1 of 'atoi' makes pointer from integer without a cast user.c:29: warning: passing argument 1 of 'atoi' makes pointer from integer without a cast user.c:33: warning: passing argument 1 of 'atoi' makes pointer from integer without a cast user.c:34: warning: passing argument 1 of 'atoi' makes pointer from integer without a cast user.c:68: warning: control reaches end of non-void function