C++: Convert string to int or vice-versa

strinstream is very useful for many basic jobs with strings, for example parsing numeric data from a string, converting a string to int/float, converting int/float to string, etc.

Here goes examples of how to use stringstream to convert to and from strings.

#include <iostream>
#include <sstream>

using namespace std;

int main()
{
   stringstream ss;
   string s;
   int n;

   //to convert int to string
   n = 1024;

   ss.clear();
   ss << n;        //write the int to stringstream
   ss >> s;        //read back the value as a string
   cout << "string value: " << s << endl;

   //to convert int to string
   s = "2048";

   ss.clear();
   ss << s;        //write the string to stringstream
   ss >> n;        //read back the value as an int
   cout << "int value: " << n << endl;

}

Have fun!