golang 接口interface 多态

多态就是多重形态。

案例： 

收入的案例：

package main

import (
	"fmt"
)

type Income interface {
	calculate () float64
	source() string

}
//固定账单项目
type FixedBuilding struct {
	ProjectName string
	biddedAcount float64

}
// 定时和材料项目
type TimeAndMetiarl struct {
	ProjectName string
	WorkHours int64 
	WorkRate float64

}

func (f FixedBuilding)calculate() float64 {

	return f.biddedAcount
	
}

func (f FixedBuilding)source() string {
	return f.ProjectName

}

//通过广告点击获得收入
type Advertise struct {
	dName string
	Clickout int
	incomePerclick float64
}

func (a Advertise)calculate() float64 {
	// a.incomePerclick*a.Clickout
	return a.incomePerclick*float64(a.Clickout)
	
}

func (a Advertise)source() string {
	return a.dName

}

func calculateNetIncome(ic []Income)float64  {
	netIncome :=0.0
	for _,v := range ic{
		fmt.Printf("收入来源：%s 收入金额：%+v 
",v.source(),v.calculate())
		netIncome +=v.calculate()
	}

	return netIncome
	
}

func main()  {
	p1 :=FixedBuilding{
		"项目1",
		8000,
	}

	p2 :=FixedBuilding{
		"项目2",
		9000,
	}

	p3 :=Advertise{
		dName:          "百度",
		Clickout:       100,
		incomePerclick: 60,
	}

	p4 :=Advertise{
		dName:          "谷歌",
		Clickout:       10,
		incomePerclick: 80,
	}

	ic := []Income{p1,p2,p3,p4}

	fmt.Println(calculateNetIncome(ic))


	


	
}

/* out

收入来源：项目1 收入金额：8000
收入来源：项目2 收入金额：9000
收入来源：百度 收入金额：6000
收入来源：谷歌 收入金额：800
23800



*/