Compilare: main.cpp: In function 'void substringMatching(const string&, const string&)': main.cpp:44:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ((i < substring.length()) && (substring[i] == '*')) ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:50:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i < substring.length() - 1; i++) ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:73:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < text.length()) ~~^~~~~~~~~~~~~~~ main.cpp:83:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (check == std::string::npos) ~~~~~~^~~~~~ main.cpp:101:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (itPos == pos.size()) ~~~~~~^~~~~~~~~~~~~