Compilare: user.c: In function 'main': user.c:172: warning: format '%s' expects type 'char *', but argument 3 has type 'char (*)[64]' user.c:172: warning: format '%s' expects type 'char *', but argument 4 has type 'char (*)[64]' user.c:178: warning: implicit declaration of function 'strcmp' user.c:185: warning: implicit declaration of function 'strcpy' user.c:185: warning: incompatible implicit declaration of built-in function 'strcpy' user.c:192: warning: incompatible implicit declaration of built-in function 'strcpy' user.c:163: warning: unused variable 'l' user.c: In function 'cicluzero': user.c:97: warning: 'vs' may be used uninitialized in this function