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pl:prolog:pllib:welfare_payments [2019/06/27 15:50] (aktualna) |
| ====== Welfare payments ====== |
| {{tag>misc}} |
| ===== Description ===== |
| Determining welfare payments |
| |
| **Source**: The Art of Prolog |
| ===== Download ===== |
| Program source code: {{welfare_payments.pl}} |
| ===== Listing ===== |
| <code prolog> |
| /* |
| pension(Person,Pension) :- Pension is the type of pension received by Person. |
| */ |
| pension(X,invalid_pension) :- invalid(X). |
| pension(X,old_age_pension) :- over_65(X), paid_up(X). |
| pension(X,supplem_benefit) :- over_65(X). |
| |
| invalid(mc_tavish). |
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| over_65(mc_tavish). over_65(mc_donald). over_65(mc_duff). |
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| paid_up(mc_tavish). paid_up(mc_donald). |
| |
| % Program 11.11a Determining welfare payments |
| </code> |
| ===== Comments ===== |
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