Ideone.com | Online Prolog Interpreter & Debugging Tool

language:	Prolog (swi) (swipl 5.6.64)
date:	103 days 18 hours ago
link:
visibility:	public private user's deleted

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parent( mary, john).
parent( ann, mary).
female( mary).
mother( x, y) :- parent( x, y), female( x).
grandparent( x, y) :- parent( x, z), parent( z, y).

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# 4 # 3 # 2 # 1

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# 4: hide show clone input 103 days 18 hours ago Success

result: Success time: 0.02s memory: 6204 kB returned value: 0
input:
```
?-
```
output: no
stderr:
```
ERROR: Stream user_input:0:0 Syntax error: Unexpected end of file
```

# 3: show clone input 103 days 18 hours ago Success

input:

parent( x. y);

stderr:

ERROR: Syntax error: Unexpected end of clause
ERROR: parent( x 
ERROR: ** here **
ERROR: . 

ERROR: Stream user_input:0:5 Syntax error: Unexpected end of file

# 2: hide show clone input 103 days 18 hours ago Success

result: Success time: 0.02s memory: 6204 kB returned value: 0
input:
```
parent( x, john).
```
output: no
stderr:
```
false.
```
# 1: hide show clone input 103 days 18 hours ago Success

result: Success time: 0.02s memory: 6204 kB returned value: 0
input:
```
parent( mary, john).
```
output: no
stderr:
```
true.
```

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