Compilare: user.cpp: In function ‘int main()’: user.cpp:43:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2; i < n; i++) ^ user.cpp:58:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2; i < n; i++) ^ user.cpp:65:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < n && match_key_word[i + 1] > match_key_word[i]) ^