Compilare: main.cpp: In function 'int main()': main.cpp:19:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(int i = 0; i <= s.size() && s.size() < 100; i++) { | ~~^~~~~~~~~~~