56 lines
1.5 KiB
Go
56 lines
1.5 KiB
Go
// Copyright 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"fmt"
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"math"
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)
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// Quote represents a currency value.
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type Quote struct {
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Dollars uint32
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Cents uint32
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}
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// String representation of the Quote.
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func (q Quote) String() string {
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return fmt.Sprintf("$%d.%d", q.Dollars, q.Cents)
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}
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// CreateQuoteFromCount takes a number of items and returns a Price struct.
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func CreateQuoteFromCount(count int) Quote {
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return CreateQuoteFromFloat(quoteByCountFloat(count))
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}
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// CreateQuoteFromFloat takes a price represented as a float and creates a Price struct.
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func CreateQuoteFromFloat(value float64) Quote {
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units, fraction := math.Modf(value)
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return Quote{
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uint32(units),
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uint32(math.Trunc(fraction * 100)),
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}
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}
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// quoteByCountFloat takes a number of items and generates a price quote represented as a float.
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func quoteByCountFloat(count int) float64 {
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if count == 0 {
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return 0
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}
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count64 := float64(count)
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var p = 1 + (count64 * 0.2)
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return count64 + math.Pow(3, p)
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}
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