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#include <iostream>
#include <sstream>
using namespace std;
int main()
{
istringstream istr("123 345"); // store some text.
int x;
istr.seekg(2); // skip "12"
istr >> x; // extract int
cout << x << '\n'; // write it out
istr.seekg(0); // retry from the beginning
istr >> x; // extract int
cout << x << '\n'; // write it out
istr.str("666"); // store another text
istr >> x; // extract it
cout << x << '\n'; // write it out
}
/*
output of this program:
3
123
666
*/
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