Re-run program instead of exit

Hi there.  I would like to give the option to re-run the my program once it converts one of the choices.  Currently I have the program exiting after finding one currency conversion by:

  {
      printf("End of program");
      printf("\n");
      printf("Press Enter to close program.");
      }
      getchar ();
      return 0;
 }

I'm wondering how I can keep it open and have it give the option to "select another choice" or "start over".  I can provide the entire program if you need.  Thanks.

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