C++/String/string swap

 
 
#include <iostream>
using std::cout;
using std::endl;
#include <string>
using std::string;
int main()
{
   string first( "one" ); 
   string second( "two" );
   cout << "Before swap:\n first: " << first << "\nsecond: " << second;
   first.swap( second ); // swap strings
   cout << "\n\nAfter swap:\n first: " << first
      << "\nsecond: " << second << endl;
   return 0;
}
/* 
Before swap:
 first: one
second: two
After swap:
 first: two
second: one
 */