Compilare: main.cpp: In function 'std::__cxx11::string CAPS(std::__cxx11::string)': main.cpp:9:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(short d=0; d<=a.length(); d++) { ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:47:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(short j=0; j<=o.length(); j++) if (o[j]==o[n]) m++; ~^~~~~~~~~~~~