istrstream example

 #include  <iostream>
 #include  <strstream>
 #include  <string>
 int  main()  {
         string  s  =  "here  is  a  short  string";
         istrstream  is(s.c_str());
         string  w;
         while  (is  >>  w)  {
                 cout  <<  w  <<  endl;
         }
 }