push_back
Syntax:
  #include <string>
  void push_back( char c );

The push_back() function appends c to the end of the string.

For example, the following code adds 10 characters to a string:

   string the_string;
   for( int i = 0; i < 10; i++ )
     the_string.push_back( i+'a' );           

When displayed, the resulting string would look like this:

  abcdefghij

push_back() runs in constant time.