Eroare de compilare: /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/crt1.o: In function `_start': (.text+0x20): undefined reference to `main' ./ccZZpfz2.o: In function `guess[abi:cxx11](int, int)': main.cpp:(.text+0x1f5): undefined reference to `query(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)' main.cpp:(.text+0x3c0): undefined reference to `query(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)' collect2: error: ld returned 1 exit status Non zero exit status: 1