Compilare: user.cpp: In function ‘int nr_cuv(int, int)’: user.cpp:16:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(lit<p2 && lit<s.size() && isalpha(s[lit])) ^ user.cpp:21:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(lit<p2 && lit<s.size() && !isalpha(s[lit])) ^ user.cpp: In function ‘int main()’: user.cpp:32:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size();++i) ^ user.cpp:34:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while((s[i]=='!' || s[i]=='?' || s[i]=='.') && i<s.size()) ^ user.cpp:30:6: warning: unused variable ‘i’ [-Wunused-variable] int i=0,st=0,dr=0,fraze=0; ^ user.cpp:30:15: warning: unused variable ‘dr’ [-Wunused-variable] int i=0,st=0,dr=0,fraze=0; ^