Compilare: main.cpp: In function 'std::__cxx11::string trans(std::__cxx11::string, std::__cxx11::string)': main.cpp:19:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0 ; i < word.size() ; ++ i) { ~~^~~~~~~~~~~~~ main.cpp: In function 'int main(int, const char**)': main.cpp:49:12: warning: statement has no effect [-Wunused-value] for (idx ; idx <= elements ; ++ idx) { ^