Compilare: user.cpp: In function ‘void quicksort(int, int)’: user.cpp:21: warning: unused variable ‘aux’ user.cpp: In function ‘int reactivi()’: user.cpp:64: warning: no return statement in function returning non-void user.cpp:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result