Compilare: main.cpp: In function 'int main()': main.cpp:77:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 77 | for(int i = 0; i < s.size(); i++) out << s[i].x << " " << s[i].y << '\n'; | ~~^~~~~~~~~~