How do I fix this error?

facultyAPP.cpp ] Faculty.h Faculty.cpp 1 // Faculty.h 2 #include 3 using namespace std; 5 6 #ifndef FACULTY_H #define FACULTY_H class Faculty public: Faculty ; void set Na mestring, string); void setID(string); string print ; protected: string first_name; string last_name; string id; 20 # endif facultyAPP.cpp (*] Faculty.h Faculty.cpp #include Faculty. h** 3 Faculty: : Faculty set Name("",""); 6 8 voi d Facultyri set Na mestring first, string last, 9 first_name = first; last_name = last; 12 13 void Faculty::setID string id) 14 this-> id = id; 16 L) return first name + " " + last name 18string Faculty i got Na meo 19 } rces al Compile Log Debug Find Results 3 Close Message [Warning) command line option -std=c99' is valid for C/ObjC but not for C++ [Error] definition of implicitly-declared constexpr Faculty:Faculty 6 Downloads\cclplus.exe 6 Downloads\Faculty.cpp