Compilare: user.cpp: In function ‘int main()’: user.cpp:82:62: warning: ‘c2’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << l1 << ' ' << c1 << ' ' << l2 << ' ' << c2 << '\n'; ^~~~ user.cpp:82:36: warning: ‘c1’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << l1 << ' ' << c1 << ' ' << l2 << ' ' << c2 << '\n'; ^~~ user.cpp:82:49: warning: ‘l2’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << l1 << ' ' << c1 << ' ' << l2 << ' ' << c2 << '\n'; ^~~ user.cpp:82:23: warning: ‘l1’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << l1 << ' ' << c1 << ' ' << l2 << ' ' << c2 << '\n'; ^~~