golang-练习ATM --面向对象实现

package utils

import (
    "fmt"
    "strings"
)

type StructAtm struct {
    action int
    loop bool
    save_money int
    money int
    draw_money int
}

func NewStructAtm() *StructAtm  {
    return &StructAtm{
        action : 0,
        loop :true,
        save_money :0,
        money :0,
        draw_money :0,
    }
}


func (this *StructAtm) find(){
    fmt.Printf("余额为：%d \n",this.money)
}
func (this *StructAtm) save(){
    fmt.Println("请输入存款金额：")
    //fmt.Scanf("%d\n",&save_money) //使用scanf必须加\n不然会打印两次
    fmt.Scanln(&this.save_money)
    fmt.Println(this.save_money)
    this.money += this.save_money
    fmt.Printf("存款金额%d，存款成功\n",this.save_money)
}
func (this *StructAtm) draw(){
    fmt.Println("请输入具体取款金额：")
    fmt.Scanln(&this.draw_money)
    if this.draw_money <= this.money{
        this.money -= this.draw_money
        fmt.Printf("成功取款,余额为：%d\n",this.money)
    }else {
        fmt.Println("余额不足")
    }
}
func (this *StructAtm) shoping(){
    shop_goods := make(map[string]int)
    goods_list := make([]string,0)
    var goodName string
    var shopmany int
    if len(shop_goods)==0 {
        this.add_goods(&shop_goods)
    }
    fmt.Println(shop_goods)
    this.shop_car(goodName ,&goods_list)
    for i:=0 ; i<len(goods_list);i++{
        v,_ :=shop_goods[goods_list[i]]
        shopmany += v
    }
    if this.money < shopmany{
        fmt.Println("购物失败，余额不足，请及时充值")
    }else{
        this.money -=  shopmany
    }
}

func (this *StructAtm) add_goods(g *map[string]int) {
    for{
        var(
            name string
            price int
        )
        fmt.Println("输入新增的商品名称,按Q退出：")
        fmt.Scanln(&name)
        if strings.ToUpper(name)=="Q"{
            break
        }
        fmt.Println("输入该商品价格：")
        fmt.Scanln(&price)
        (*g)[name]= price
    }
}
func (this *StructAtm) shop_car(gn string,gl *[]string) {
    for{
        fmt.Println("输入要购买的商品(Q退出)：")
        fmt.Scanln(&gn)
        if gn =="Q" {
            break
        }
        *gl = append(*gl,gn)
    }
}
func (this *StructAtm) manager() {
    fmt.Println("-----欢迎登陆中国银行-----")
    fmt.Println("\t1:查询余额")
    fmt.Println("\t2:存款")
    fmt.Println("\t3:取款")
    fmt.Println("\t4:购物")
    fmt.Println("\t5:退出")
    fmt.Println("请输入你的操作：")
    fmt.Scanln(&this.action)
    switch this.action {
    case 1:
        this.find()
    case 2:
        this.save()
    case 3:
        this.draw()
    case 4:
        this.shoping()
    case 5:
        this.loop = false
    default:
        fmt.Println("输入有误，请输入1-4之间的数字")
    }
}

func (this *StructAtm) MainMenu() {
    for {
        this.manager()
        if this.loop == false{
            fmt.Println("----欢迎使用，再见----")
            break
        }
    }
}

package main

import (
    "fmt"
    "go_dev/structAtm/utils"
)

func main() {
    fmt.Println("面向对象ATM练习")
    utils.NewStructAtm().MainMenu()
}