Compilare: main.cpp: In function 'int main()': main.cpp:18:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0;i<text.size();i++) ~^~~~~~~~~~~~ main.cpp:34:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0;i<text.size();i++) ~^~~~~~~~~~~~ main.cpp:56:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0;i<text.size();i++) ~^~~~~~~~~~~~