Compilare: main.cpp: In function 'int main()': main.cpp:26:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < word1.length(); i++) ~~^~~~~~~~~~~~~~~~ main.cpp:28:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < word2.length(); i++) ~~^~~~~~~~~~~~~~~~