Compilare: user.cpp: In function ‘int main()’: user.cpp:20:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<s.length(); i++) ^ user.cpp:27:78: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (n+3-q[s[i+1]-96+1]-q[s[i+2]-96+1]-q[s[i+3]-96+1]>=0 && i+3==s.length()) fout<<s[i]<<s[i+1]<<s[i+2]; else fout<<"..."; ^