[c-prog] replace characters

[sejal patel]

Hi
I have a quastion.
I want to replace characters in this prog.
but the found value prints :4294967295
i dont understand why this happen?

#include<iostream>
#include <vector>
#include <string>
#include <sstream>

using namespace std;

int main()
{
    string str("aa bb cc dd <ee> ff <gg> hh <ii> jj"),search,replace;
    cout<<str;
    string buf; 
    stringstream ss(str); // Insert the string into a stream

    vector<string> tokens; 
    vector<string>::iterator iter;
    while (ss >> buf)
        tokens.push_back(buf);

  iter = tokens.begin()+2;
  while(  iter != tokens.end())
  {
          cout << endl<<*iter ;
          search="<" + *iter + ">";

          iter++;
          replace=*iter;
          size_t found=str.find( search,0);
          cout<<"found:"<<found<<endl;
          while ( found != string::npos )
          {

                 str.replace( found, search.size(), replace);
                 cout<<"str:"<<str<<"+++++";
                 found = str.find( search, found+replace.size()+1 );
          }
          *iter++;

  }
 cout<<"Now string is:"<<str;

}

please help me.
Thanks.