Compilare: user.cpp: In function ‘int main()’: user.cpp:19:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < strlen(text)-1; i++) ^ user.cpp:21:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i+1; j < strlen(text); j++) ^ user.cpp:23:73: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (text[j] < text[j-1] && text[j] < text[j+1] && j + 1 < strlen(text)) ^