Compilare: main.cpp: In function 'int main()': main.cpp:19:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < pattern.size(); ++i) { ~~^~~~~~~~~~~~~~~~ main.cpp:33:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < text.size()) { ~~^~~~~~~~~~~~~ main.cpp:42:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos == pattern.size()) { ~~~~^~~~~~~~~~~~~~~~~