Compilare: user.cpp: In function ‘int main()’: user.cpp:2:220: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] using namespace std;string s1,s2;int nr=0,last,sizee;vector <int>pos;int main(){ifstream in("strmatch.in");ofstream out("strmatch.out");in>>s1>>s2;sizee=s1.size();while((last=s2.find(s1.c_str(),last+1,sizee))!=string::npos)nr++,pos.push_back(last);out<<nr<<'\n';for(int i=0;i<pos.size() && i<1000;i++)out<<pos[i]<<" ";return 0;} ^ user.cpp:2:287: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] using namespace std;string s1,s2;int nr=0,last,sizee;vector <int>pos;int main(){ifstream in("strmatch.in");ofstream out("strmatch.out");in>>s1>>s2;sizee=s1.size();while((last=s2.find(s1.c_str(),last+1,sizee))!=string::npos)nr++,pos.push_back(last);out<<nr<<'\n';for(int i=0;i<pos.size() && i<1000;i++)out<<pos[i]<<" ";return 0;} ^