Compilare: user.c: In function 'push': user.c:28: warning: assignment from incompatible pointer type user.c: In function 'sterge': user.c:35: warning: assignment from incompatible pointer type user.c: In function 'bf': user.c:40: warning: 'return' with no value, in function returning non-void user.c: In function 'main': user.c:84: warning: implicit declaration of function 'memset' user.c:84: warning: incompatible implicit declaration of built-in function 'memset' user.c: In function 'bf': user.c:70: warning: control reaches end of non-void function