Compilare: user.c: In function ‘sort’: user.c:36: warning: unused variable ‘sorted’ user.c: In function ‘main’: user.c:69: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:70: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:72: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:75: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result