Compilare: user.cpp: In function ‘int main()’: user.cpp:34:9: warning: unused variable ‘i’ [-Wunused-variable] int i, j, nr_groups = 0, max_group = 0, destination; ^ user.cpp:34:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, nr_groups = 0, max_group = 0, destination; ^ user.cpp:97:49: warning: ‘destination’ may be used uninitialized in this function [-Wmaybe-uninitialized] groups[*___it] = destination; ^