Compilare: user.cpp: In function ‘int main()’: user.cpp:103:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int pt1 = 0, pt2 = 0; pt1 + 1 < lst1.size(); pt1 ++ ) { ^ user.cpp:104:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( pt2 + 1 < lst2.size() && ccw( lst1[pt1], lst2[pt2], lst2[pt2 + 1] ) < 0 ) ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:14:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^