Compilare: main.cpp: In function 'std::__cxx11::string modificaSir()': main.cpp:42:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(indx >= seq.size()) { ~~~~~^~~~~~~~~~~~~ main.cpp:46:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(indx < seq.size() && seq[indx] >= 'a' && seq[indx] <= 'z') { ~~~~~^~~~~~~~~~~~ main.cpp:50:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(indx >= seq.size()) { ~~~~~^~~~~~~~~~~~~ main.cpp:56:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(indx < seq.size() && seq[indx] >= '0' && seq[indx] <= '9') { ~~~~~^~~~~~~~~~~~ main.cpp:82:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(indx >= seq.size() || check(seq[indx])) { ~~~~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:93:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < seq.size(); i++) { ~~^~~~~~~~~~~~