Compilare: user.cpp: In function ‘void myqsort(int, int, int*)’: user.cpp:17:23: warning: unused variable ‘aux’ [-Wunused-variable] int b=begin,e=end,aux,pivot=z[(b+e)/2]; ^ user.cpp: In function ‘int main()’: user.cpp:74:10: warning: variable ‘a’ set but not used [-Wunused-but-set-variable] char a; ^ user.cpp:77:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d" ,&n,&k); ^