Compilare: main.cpp: In function 'void kmp(std::__cxx11::string, std::__cxx11::string)': main.cpp:33:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int current=0; current< text.length(); current++) { ~~~~~~~^~~~~~~~~~~~~~~ main.cpp:40:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( matched_pos == (pattern.length())) { ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:56:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < results.size(); i++) ~~^~~~~~~~~~~~~~~~