How to signify no more input for string ss in the loop while (cin >> ss)

Question

I used \"cin\" to read words from input stream, which like

int main( ){
     string word;
     while (cin >> word){
         //do sth on the input word         


        

Answer 1

It helps me to terminate loop by hitting ENTER.

int main() {
    string word;
    while(getline(cin,word) && s.compare("\0") != 0) {
        //do sth on the input word
    }

    // perform some other operations
}