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Prolog Source  |  1988-06-21  |  345 b   |  16 lines
  1. /*
  2.    Turbo Prolog 2.0 Chapter 4, Example Program 4
  3.    
  4.    Copyright (c) 1986, 88 by Borland International, Inc
  5.    
  6. */
  7.    
  8. predicates
  9.    phone_number(symbol, symbol)
  10.  
  11. clauses
  12.    phone_number("Albert", "EZY-3665").
  13.    phone_number("Betty", "555-5233").
  14.    phone_number("Carol", "909-1010").
  15.    phone_number("Dorothy", "438-8400").
  16.