Compilare: user.cpp: In function ‘int main()’: user.cpp:80:12: warning: unused variable ‘j’ [-Wunused-variable] long i,j,l; ^ user.cpp:80:14: warning: unused variable ‘l’ [-Wunused-variable] long i,j,l; ^ user.cpp: In function ‘void quicksort(long int*, long int, long int)’: user.cpp:43:9: warning: ‘ma’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(ma==y) ^ user.cpp:52:16: warning: ‘mi’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(mi==x) ^