Compilare: main.cpp: In function 'bool subsir(std::__cxx11::string, std::__cxx11::string)': main.cpp:17:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<b.size(); i++,j++) { ~^~~~~~~~~ main.cpp:18:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < a.size()) { ~~^~~~~~~~~~ main.cpp:25:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j+1 >= a.size()) ~~~~^~~~~~~~~~~ main.cpp:28:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(gasite == b.size()) ~~~~~~~^~~~~~~~~~~