Compilare: user.cpp: In function ‘void quick_sort(int*, int, int)’: user.cpp:14:7: warning: unused variable ‘aux’ [-Wunused-variable] int aux; ^ user.cpp: In function ‘int main()’: user.cpp:39:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &N); ^ user.cpp:42:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v[i]); ^