string.insert( 3, string4, 0, string::npos ) : string insert « string « C++ Tutorial

1. C++ Tutorial
2. string
3. string insert

#include <iostream>
using std::cout;
using std::endl;

#include <string>
using std::string;

int main()
{
   string string1( "beginning end" );
   string string2( "middle " );
   string string3( "12345678" );
   string string4( "xx" );

   cout << "Initial strings:\nstring1: " << string1
      << "\nstring2: " << string2 << "\nstring3: " << string3
      << "\nstring4: " << string4 << "\n\n";

   // insert string4 at location 3 in string3
   string3.insert( 3, string4, 0, string::npos );

   cout << "Strings after insert:\nstring1: " << string1
      << "\nstring2: " << string2 << "\nstring3: " << string3
      << "\nstring4: " << string4 << endl;
   return 0;
}

Initial strings:
string1: beginning end
string2: middle
string3: 12345678
string4: xx

Strings after insert:
string1: beginning end
string2: middle
string3: 123xx45678
string4: xx