Converting string to int

#include <sstream>
#include <iostream>
 
using namespace std;
 
int main()
{
    string s = "-123";
 
    int i;
    bool success;
    istringstream myStream(s);
 
    if (myStream>>i)
        success = true;
    else
        success = false;
 
    std::cout << success << std::endl;
    std::cout << i << std::endl;
}