Compilare: user.c: In function 'arie': user.c:12: warning: implicit declaration of function 'abs' user.c: In function 'main': user.c:60: warning: 'sl' may be used uninitialized in this function user.c:60: warning: 'sk' may be used uninitialized in this function user.c:60: warning: 'sj' may be used uninitialized in this function user.c:60: warning: 'si' may be used uninitialized in this function