Compilare: user.c: In function ‘main’: user.c:33: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:35: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:37: warning: control reaches end of non-void function user.c: In function ‘sortare’: user.c:4: warning: ‘aux’ may be used uninitialized in this function