Compilare: main.cpp: In function 'int main()': main.cpp:17:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | for(i=0;i<s.size();++i) | ~^~~~~~~~~ main.cpp:23:12: warning: 'poz' may be used uninitialized [-Wmaybe-uninitialized] 23 | g<<poz+1; | ^ main.cpp:14:9: note: 'poz' was declared here 14 | int poz,i; | ^~~