Compilare: user.cpp: In function ‘void initChenar(std::vector<Cadru>&)’: user.cpp:22:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=C.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:75:34: warning: variable ‘j_down’ set but not used [-Wunused-but-set-variable] int m=0,i_up,j_up,i_down,j_down,i_left,j_left,i_right,j_right; ^ user.cpp:75:55: warning: variable ‘i_right’ set but not used [-Wunused-but-set-variable] int m=0,i_up,j_up,i_down,j_down,i_left,j_left,i_right,j_right; ^