67 lines
1.1 KiB
Go
67 lines
1.1 KiB
Go
package main
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import "fmt"
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/*
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实例
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汤宝宝家有一台咖啡机，他会自动给美式咖啡加奶和糖...
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*/
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type Drink interface {
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GetPrice() float64
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cost()
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}
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type Coffee struct {
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name string
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Price float64
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}
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func (c *Coffee) GetPrice() float64 {
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return c.Price
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}
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func (c *Coffee) cost() {
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fmt.Printf("一杯%s咖啡，价格%.2f元。\n", c.name, c.Price)
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}
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type Maker struct {
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wrappedDrink Drink
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milkPrice float64
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sugarPrice float64
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}
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func (m *Maker) GetPrice() float64 {
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return m.wrappedDrink.GetPrice()
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}
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func (m *Maker) cost() {
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m.wrappedDrink.cost()
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fmt.Printf("加了奶和糖，总价%.2f元。\n",
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m.wrappedDrink.GetPrice()+m.milkPrice+m.sugarPrice)
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}
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func main() {
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fmt.Println("============= 装饰器模式 =============")
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var coffee, newCoffee Drink
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fmt.Println("自己泡杯咖啡")
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coffee = &Coffee{
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name: "美式",
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Price: 10.0,
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}
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coffee.cost()
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fmt.Println("\n用咖啡机泡杯咖啡")
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newCoffee = &Maker{
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wrappedDrink: coffee,
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milkPrice: 1.0,
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sugarPrice: 1.0,
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}
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newCoffee.cost()
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fmt.Println()
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fmt.Println("=========== 装饰器模式结束 ===========")
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}
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