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62 lines
2.6 KiB
Plaintext
62 lines
2.6 KiB
Plaintext
** Multiplication of units
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(Clothes made of priced fabrics; Fabrication)
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A system of assembling clothing from a pattern and materials; both the pattern and the different fabrics have associated prices.
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When we make a new kind of value, the new named values can themselves have properties. That is convenient because, for instance, we might want to associate a material (itself the property of an object) with certain features, such as price.
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{*}"Fabrication"
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Section 1 - Procedure
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A material is a kind of value. The materials are silk, velvet, cotton, and wool.
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Price is a kind of value. $1.99 specifies a price.
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Area is a kind of value. 5 sq yards specifies an area.
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Cost is a kind of value.. $1.99 per sq yard specifies a cost. A cost times an area specifies a price.
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A material has a cost.
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The cost of silk is usually $5.75 per sq yard. The cost of velvet is usually $9.50 per sq yard. The cost of cotton is usually $2.29 per sq yard. The cost of wool is usually $4.75 per sq yard.
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A pattern is a kind of thing. A pattern has a material. A pattern has an area. A pattern has a price. The price of a pattern is usually $9.99. Understand "pattern" as a pattern. Understand "patterns" as the plural of a pattern.
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After printing the name of a pattern:
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if planning:
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do nothing;
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otherwise:
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say " pattern".
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To decide what price is the material price of (chosen item - pattern):
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let C be the cost of the material of the chosen item;
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let A be the area of the chosen item;
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decide on C * A.
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To decide what price is the overall price of (chosen item - pattern):
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let P be the price of the chosen item;
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let M be the material price of the chosen item;
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decide on P + M.
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Understand "plan [material] [pattern]" as planning it for.
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Planning it for is an action applying to one material and one thing.
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Carry out planning it for:
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now the material of the second noun is the material understood.
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Report planning it for:
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say "You lay plans for a [material understood] [second noun], running [material price of the second noun] for materials and [price of the second noun] for the pattern itself, for a total of [overall price of the second noun]."
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Section 2 - Scenario
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Joanne's Fabrics is a room. Joanne's Fabrics contains a pattern bin.
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The cape is a pattern. The material of the cape is velvet. The area of the cape is 9 sq yards.
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The bodice is a pattern. The material of the bodice is silk. The area of the bodice is 2 sq yards. The price of the bodice is $11.99.
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The cape and the bodice are in the pattern bin.
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Test me with "plan silk bodice / plan velvet bodice / plan velvet cape / plan wool cape".
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