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  1. CLAUSES
  2.  
  3. father(zeb, john_boy_sr).
  4. father(john_boy_sr, john_boy_jr).
  5. father(a, b).
  6. father(b, c).
  7.  
  8. ancestor(X, Y, Z):- father(X,Y), father(Y, Z).
  9.  
  10. GOAL
  11.  
  12. ancestor(X, Y, Z), write(X,”-”,Y,”-”,Z),nl.
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.pl:3:1: syntax error: . or operator expected after expression
prog.pl:12:1: syntax error: . or operator expected after expression
	2 error(s)
compilation failed
stdout
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Standard output is empty
https://ideone.com/Ybd01
language:
Prolog (gprolog 1.4.5)
created:
14 years ago
visibility:
public

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