Compilare: user.c: In function 'main': user.c:11: warning: unused variable 'start' user.c:11: warning: unused variable 'poz' user.c:11: warning: unused variable 'ns' user.c:11: warning: unused variable 'k' user.c:11: warning: unused variable 'c' user.c:11: warning: unused variable 'nt' user.c:11: warning: 'sy' may be used uninitialized in this function user.c:11: warning: 'sx' may be used uninitialized in this function /tmp/ccKgC37X.o: In function `main': user.c:(.text+0xdd): warning: the `gets' function is dangerous and should not be used.