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August 20, 2012 15:26
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Learn Prolog Now, Exercises 2.3 Crossword
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| % 2.3 | |
| word(astante, a,s,t,a,n,t,e). | |
| word(astoria, a,s,t,o,r,i,a). | |
| word(baratto, b,a,r,a,t,t,o). | |
| word(cobalto, c,o,b,a,l,t,o). | |
| word(pistola, p,i,s,t,o,l,a). | |
| word(statale, s,t,a,t,a,l,e). | |
| crossword(V1, V2, V3, H1, H2, H3) :- | |
| word(V1, _,V1H1,_,V1H2,_,V1H3,_), | |
| word(V2, _,V2H1,_,V2H2,_,V2H3,_), | |
| word(V3, _,V3H1,_,V3H2,_,V3H3,_), | |
| word(H1, _,V1H1,_,V2H1,_,V3H1,_), | |
| word(H2, _,V1H2,_,V2H2,_,V3H2,_), | |
| word(H3, _,V1H3,_,V2H3,_,V3H3,_), | |
| V1 \= V2, | |
| V2 \= V3, | |
| V3 \= H1, | |
| H1 \= H2, | |
| H2 \= H3. |
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| ?- crossword(V1,V2,V3,H1,H2,H3). | |
| V1 = astante, | |
| V2 = baratto, | |
| V3 = statale, | |
| H1 = astante, | |
| H2 = baratto, | |
| H3 = statale |
Can you explain to me what the combined variables do? Like word(V1, ,V1H1,,V1H2,,V1H3,)?
Can you explain to me what the combined variables do? Like word(V1, ,V1H1,,V1H2,,V1H3,)?
Nothing, they are just individual variables named that way for an easier overview.
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Better solution, which doesn't use repetitions: https://gist.github.com/ITPol/f8f5418d4f95015b3586#file-crossword-prolog