go 接口方和类方法 计算薪资

package main

import("fmt")

type Programer struct {
	name string
	base float32
	extra float32
}

func (p Programer) CalcSalary() float32 {
	return p.base
}

type Sale struct {
	name string
	base float32
	extra float32
}

type Employer interface {
	CalcSalary() float32
}

func (p Sale) CalcSalary() float32 {
	return p.base + p.extra*p.base*0.5
}

func NewProgramer(name string, base ,extra float32) Programer {
	return Programer {
		name:name,
		base:base,
		extra:extra,
	}	
}

func NewSale(name string, base,extra float32) Sale  {
	return Sale {
		name:name,
		base:base,
		extra:extra,
	}	
}

func calcAll(e []Employer) float32{
	var cost float32
	for _, v := range e {
		cost = cost + v.CalcSalary()
	}
	return cost

}

func main(){
	p1 := NewProgramer("搬砖1",15000.0,0.0)
	p2 := NewProgramer("搬砖2",16000.0,0.0)
	p3 := NewProgramer("搬砖3",17000.0,0.0)

	s1 := NewSale("销售1",1000.0,2.5)
	s2 := NewSale("销售2",1100.0,2.5)
	s3 := NewSale("销售3",1200.0,2.5)
	
	var employList []Employer           // 切片的接口类型
	employList = append(employList, p1) // 由于这些对象都实现了接口方法, 可以把这些对象放入接口切片中
	employList = append(employList, p2)
	employList = append(employList, p3)
	employList = append(employList, s1)
	employList = append(employList, s2)
	employList = append(employList, s3)
	cost := calcAll(employList)
	fmt.Printf("这个月的总工资%f",cost)
}