Compilare: user.cpp: In function ‘int main()’: user.cpp:41:20: warning: ‘u’ may be used uninitialized in this function [-Wmaybe-uninitialized] return fo << (u-p+1) << ' ' << p << '\n',0; ^ user.cpp:41:36: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] return fo << (u-p+1) << ' ' << p << '\n',0; ^