How do you get the remaining string after a string extracted from a sstream variable?

Question

Like I have a stringstream variable contains "abc gg rrr ff"

When I use >> on that stringstream variable, it gives me "abc". How can I get the remaining string: " gg rrr ff"? It seems neither str() nor rdbuf() does this work.

Answer 1

You can use std::getline to get the rest of the string from the stream:

#include <iostream> #include <sstream>  using namespace std;  int main() {         stringstream ss("abc gg rrr ff");         string s1, s2;         ss >> s1;         getline(ss, s2); //get rest of the string!         cout << s1 << endl;         cout << s2 << endl;         return 0; } 

Output:

abc gg rrr ff 

Demo : http://www.ideone.com/R4kfV

There is an overloaded std::getline function in which a third parameter takes a delimiter upto which you can read the string. See the documentation of std::getline:

• std::getline

Answer 2

#include <iostream> #include <sstream> #include <string> using namespace std;  int main() {     string str("123 abc");     int a;     istringstream is(str);     is >> a;      // here we extract a copy of the "remainder"     string rem(is.str().substr(is.tellg()));      cout << "Remaining: [" << rem << "]\n"; }