Go语言(Golang)环形队列

package main

import (
    "fmt"
    "errors"
    "os"
)

//管理环形队列的结构
type Queue struct {
    maxSize int
    array [5]int
    head int
    tail int
}

//入队列
func (this *Queue) Push(val int) (err error) {
    if this.IsFull() {
        return errors.New("队列已满！")
    }
    this.array[this.tail] = val
    this.tail = (this.tail + 1) % this.maxSize
    return
}

//出队列
func (this *Queue) Pop() (val int, err error) {
    if this.IsEmpty() {
        return 0, errors.New("队列为空！")
    }
    val = this.array[this.head]
    this.head = (this.head + 1) % this.maxSize
    return
}

//显示队列
func (this *Queue) Show() {
    if this.IsEmpty() {
        fmt.Println("队列为空！")
    }
    temp := this.head 
    for i := 0; i < this.Size(); i++ {
        fmt.Printf("array[%d]:%d\t",temp,this.array[temp])
        temp = (temp + 1) % this.maxSize
    }

}

//判断队列是否已满
func (this *Queue) IsFull() bool {
    return (this.tail + 1) % this.maxSize == this.head
}

//判断队列是否为空
func (this *Queue) IsEmpty() bool {
    return this.head == this.tail
}

//查询有多少个队列
func (this *Queue) Size() int {
    return (this.tail + this.maxSize - this.head) % this.maxSize
}




func main(){
    
    quque := &Queue {
        maxSize : 5,
        head : 0,
        tail : 0,
    }

    var xz string
    var number int
    for {
        fmt.Println()
        fmt.Println("1.添加队列请输入add")
        fmt.Println("2.获取队列请输入get")
        fmt.Println("3.显示队列请输入show")
        fmt.Println("4.输入exit退出")
        fmt.Scanln(&xz)

        switch xz {
        case "add" :
            fmt.Println("输入你要入列的数：")
            fmt.Scanln(&number)
            err := quque.Push(number)
            if err != nil {
                fmt.Println(err.Error())
            } else {
                fmt.Printf("加入队列成功!\n")
            }
        case "get" :
            val, err := quque.Pop()
            if err != nil {
                fmt.Println(err.Error())
            } else {
                fmt.Printf("队列已取出：%d",val)
            }
            
        case "show" :
            quque.Show()
            fmt.Println()
        case "exit" :
            os.Exit(0)
        }
    }
}