Compilare: user.cpp: In function ‘int main()’: user.cpp:58:42: warning: suggest parentheses around comparison in operand of ‘^’ [-Wparentheses] if(poz1.second == 'D' && poz2.second == 'S' xor poz2 > poz1) ^ user.cpp: In function ‘std::pair<long long int, char> get_poz(long long int)’: user.cpp:19:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘std::pair<long long int, long long int> get_coords()’: user.cpp:29:1: warning: control reaches end of non-void function [-Wreturn-type] } ^