Compilare: main.cpp: In function 'void substringMatching(const string&, const string&)': main.cpp:34:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ((i < substring.length()) && (substring[i] == '*')) ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:40:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i < substring.length() - 1; i++) ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:62:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < text.length()) ~~^~~~~~~~~~~~~~~ main.cpp:66:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (check == std::string::npos) ~~~~~~^~~~~~ main.cpp:81:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (itPos == pos.size()) ~~~~~~^~~~~~~~~~~~~