Compilare: user.c: In function 'min': user.c:12: warning: suggest explicit braces to avoid ambiguous 'else' user.c:15: warning: suggest explicit braces to avoid ambiguous 'else' user.c: In function 'main': user.c:22: warning: unused variable 'a' user.c: In function 'min': user.c:18: warning: control reaches end of non-void function user.c: In function 'main': user.c:21: warning: 'np' may be used uninitialized in this function