Go 언어로 순환 대기열을 설계하고 운영하는 방법을 알아보세요.

package main

import "fmt"

type MyCircularQueue struct {
    data []int
    size int
    front int
    rear int
}

func Constructor(k int) MyCircularQueue {
    return MyCircularQueue{
        data: make([]int, k),
        size: k,
        front: 0,
        rear: 0,
    }
}

func (this *MyCircularQueue) EnQueue(value int) bool {
    if this.IsFull() {
        return false
    }
    this.data[this.rear] = value
    this.rear = (this.rear + 1) % this.size
    return true
}

func (this *MyCircularQueue) DeQueue() bool {
    if this.IsEmpty() {
        return false
    }
    this.front = (this.front + 1) % this.size
    return true
}

func (this *MyCircularQueue) Front() int {
    if this.IsEmpty() {
        return -1
    }
    return this.data[this.front]
}

func (this *MyCircularQueue) Rear() int {
    if this.IsEmpty() {
        return -1
    }
    return this.data[(this.rear - 1 + this.size) % this.size]
}

func (this *MyCircularQueue) IsEmpty() bool {
    return this.front == this.rear
}

func (this *MyCircularQueue) IsFull() bool {
    return (this.rear + 1) % this.size == this.front
}

func main() {
    obj := Constructor(3)
    fmt.Println(obj.EnQueue(1)) // true
    fmt.Println(obj.EnQueue(2)) // true
    fmt.Println(obj.EnQueue(3)) // true
    fmt.Println(obj.EnQueue(4)) // false
    fmt.Println(obj.Rear()) // 3
    fmt.Println(obj.IsFull()) // true
    fmt.Println(obj.DeQueue()) // true
    fmt.Println(obj.EnQueue(4)) // true
    fmt.Println(obj.Rear()) // 4
}