/in/p1.cpp: In function 'void printPointArray_back(std::vector<Point>)':
/in/p1.cpp:82:12: error: 'vec' was not declared in this scope
     while(!vec.empty()){
            ^~~
/in/p1.cpp:82:12: note: suggested alternative: 'getc'
     while(!vec.empty()){
            ^~~
            getc
/in/p1.cpp:81:41: error: unused parameter 'points' [-Werror=unused-parameter]
 void printPointArray_back(vector<Point> points) {
                                         ^~~~~~
cc1plus: all warnings being treated as errors