Compilare: main.cpp: In member function 'int Polygon::area()': main.cpp:29:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0 ; i < points.size() ; ++ i) { ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:72:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &steps) ; ^ main.cpp:81:17: warning: 'prevDirection' may be used uninitialized in this function [-Wmaybe-uninitialized] if (currDirection != prevDirection) { ^~