ferma1.cpp: In function `std::pair<int, char> getSurface()': ferma1.cpp:106: parse error before `:' token ferma1.cpp:109: could not convert `(&usedZones)->std::vector<_Tp, _Alloc>::clear() [with _Tp = int, _Alloc = std::allocator<int>]()' to `bool' ferma1.cpp:110: parse error before `;' token ferma1.cpp:106: warning: unused variable `int i'