Eroare de compilare: user.cpp: In function ‘float Calc(DREAPTA, std::pair<float, float>)’: user.cpp:38:46: error: ‘c’ was not declared in this scope return (d.a * p.first + d.b * p.second + c); ^ user.cpp: In function ‘int main()’: user.cpp:77:32: error: could not convert ‘it’ from ‘std::list<std::pair<float, float> >::iterator {aka std::_List_iterator<std::pair<float, float> >}’ to ‘std::pair<float, float>’ if (Calc(d1, it) != d1.semn) ^ user.cpp: In function ‘float Calc(DREAPTA, std::pair<float, float>)’: user.cpp:39:1: warning: control reaches end of non-void function [-Wreturn-type] } ^