DS study : queue

code_study/data_structure/DS_queue.c

@@ -0,0 +1,156 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+
+typedef struct C_Queue C_Queue;
+
+void _enqueue(C_Queue *q, int value);
+int _dequeue(C_Queue *q);
+bool _isEmpty(C_Queue *q);
+bool _isFull(C_Queue *q);
+void _info(C_Queue *q);
+void _destroyQ(C_Queue *q);
+
+struct C_Queue{
+    int *data;
+    int front, rear, size;
+
+    bool (*isEmpty)(C_Queue *q);
+    bool (*isFull)(C_Queue *q);
+    void (*enqueue)(C_Queue *q, int value);
+    int (*dequeue)(C_Queue *q);
+    void (*info)(C_Queue *q);
+    void (*destroyQ)(C_Queue *q);
+};
+
+C_Queue creatQueue(int capacity){
+    C_Queue q;
+    q.front = -1;
+    q.rear = -1;
+    q.size = capacity;
+    q.data = (int*)malloc(sizeof(int)*capacity);
+    
+    q.enqueue = _enqueue;
+    q.dequeue = _dequeue;
+    q.info = _info;
+    q.isEmpty = _isEmpty;
+    q.isFull = _isFull;
+    q.destroyQ = _destroyQ;
+
+    return q;
+}
+
+int opcode(char *input);
+
+int main(){
+    printf("생성하려는 원형큐의 용량을 입력해주세요. : ");
+    int capacity;
+    scanf("%d",&capacity);
+
+    C_Queue q = creatQueue(capacity);
+    bool exit_flag = true;
+    while(exit_flag){
+        printf("+++++++++++++++++++++++++++++++++++++++++++++++++\n");
+        printf("명령어 목록 : enqueue | dequeue | info | exit\n");
+        printf("명령어를 입력해주세요. : ");
+        char input[10];
+        scanf("%s",input);
+        switch (opcode(input))
+        {
+        case 1:
+            if(q.isFull(&q)) {
+                printf("큐가 꽉차있어서 입력할 수 없습니다.\n");
+            }
+            else{
+                printf("넣을 값을 입력해주세요. : ");
+                int num;
+                scanf("%d",&num);
+                q.enqueue(&q, num);
+            }
+            break;
+        case 2:
+            if(q.isEmpty(&q)){
+                printf("큐가 비어있어서 값을 꺼낼 수가 없습니다.\n");
+            }
+            else{
+                printf("추출값 : %d\n",q.dequeue(&q));
+            }
+            break;
+        case 3:
+            q.info(&q);
+            break;
+        case 4:
+            exit_flag = false;
+            printf("종료합니다\n");
+            break;
+        default:
+            printf("명령어를 잘못 입력했습니다. 다시 입력해주세요.\n");
+            break;
+        }
+    }
+    q.destroyQ(&q);
+}
+
+int opcode(char *input){
+    if(!strcmp(input, "enqueue")) return 1;
+    if(!strcmp(input, "dequeue")) return 2;
+    if(!strcmp(input, "info")) return 3;
+    if(!strcmp(input, "exit")) return 4;
+    return -1;
+}
+
+bool _isEmpty(C_Queue *q){
+    return q->front == -1;
+}
+
+bool _isFull(C_Queue *q){
+    return ((q->rear)+1)%(q->size) == q->front;
+}
+
+void _enqueue(C_Queue *q, int value){
+    if(q->isFull(q)){
+        return;
+    }
+    if(q->isEmpty(q)){
+        q->front = 0;
+    }
+    q->rear = ((q->rear)+1)%(q->size);
+    q->data[q->rear] = value;
+}
+
+int _dequeue(C_Queue *q){
+    if(q->isEmpty(q)){
+        return -1;
+    }
+    int value = q->data[q->front];
+    if(q->front == q->rear){
+        q->front = -1;
+        q->rear = -1;
+    }
+    else{
+        q->front = ((q->front)+1)%q->size;
+    }
+
+    return value;
+}
+
+void _info(C_Queue *q){
+    if(q->isEmpty(q)){
+        printf("큐가 비어있습니다.\n");
+    }
+    else{
+        printf("큐 목록: ");
+        int i = q->front;
+        while(true){
+            printf("%d ",q->data[i]);
+            if(i==q->rear) break;
+            i = (i+1)%q->size;
+        }
+        printf("\n");
+    }
+}
+
+void _destroyQ(C_Queue *q){
+    free(q->data);
+}

code_study/data_structure/DS_queue.java

@@ -0,0 +1,120 @@
+import java.security.cert.TrustAnchor;
+import java.util.*;
+
+class Cir_Queue {
+    private int[] data;
+    private int front, rear, size;
+
+    Cir_Queue(int size){
+        this.data = new int[size];
+        this.front = -1;
+        this.rear = -1;
+        this.size = size;
+    }
+
+    public boolean isEmpty(){
+        return this.front == -1;
+    }
+
+    public boolean isFull(){
+        return (this.rear + 1)%(this.size) == front;
+    }
+
+    public void enqueue(int value){
+        if(this.isFull()){
+            System.out.println("Queue is Full!");
+            return;
+        }
+        if(this.isEmpty()){
+            this.front = 0;
+        }
+        this.rear = (this.rear + 1)%(this.size);
+        this.data[rear] = value;
+    }
+
+    public int dequeue(){
+        if(this.isEmpty()){
+            System.out.println("Queue is Empty!");
+            return -1;
+        }
+        int value = this.data[this.front];
+        if(this.rear == this.front){
+            this.rear = -1;
+            this.front = -1;
+        }
+        else {
+            this.front = (this.front + 1)%this.size;
+        }
+
+        return value;
+    }
+
+    public int peek(){
+        if(this.isEmpty()){
+            System.out.println("Queue is Empty!");
+            return -1;
+        }
+        return this.data[this.front];
+    }
+
+    public void info(){
+        if(this.isEmpty()){
+            System.out.println("큐가 비어있습니다.");
+            return;
+        }
+
+        StringBuilder result = new StringBuilder("Queue List : ");
+        int i = this.front;
+        while(true){
+            result.append(this.data[i] + " ");
+            if(i==this.rear) break;
+            i = (i + 1)%this.size;
+        }
+        System.out.println(result);
+    }
+}
+
+public class DS_queue {
+    public static void main(String[] args) {
+        Scanner sc= new Scanner(System.in);
+        System.out.println("큐의 사이즈를 입력해주세요.");
+        int size = Integer.parseInt(sc.nextLine());
+        Cir_Queue q = new Cir_Queue(size);
+
+        boolean exitFlag = true;
+        while(exitFlag){
+            System.out.println("명령어 목록 : enque [value] | deque | peek | info | exit");
+            String[] opcode = sc.nextLine().split(" ");
+            switch (opcode[0]) {
+                case "enque":
+                    q.enqueue(Integer.parseInt(opcode[1]));
+                    break;
+                case "deque":
+                    if(q.isEmpty()){
+                        q.dequeue();
+                        break;
+                    }
+                    System.out.println(q.dequeue());
+                    break;
+                case "peek":
+                    if(q.isEmpty()){
+                        q.peek();
+                        break;
+                    }
+                    System.out.println(q.peek());
+                    break;
+                case "info":
+                    q.info();
+                    break;
+                case "exit":
+                    exitFlag = false;
+                    System.out.println("Exit!!");
+                    break;
+                default:
+                    System.out.println("제대로 입력해주세요.");
+                    break;
+            }
+        }
+        sc.close();
+    }
+}

code_study/data_structure/DS_queue.py

@@ -0,0 +1,96 @@
+class queue :
+    
+    def __init__(self,size) :
+        self.__size = size
+        self.__data = [0]*size
+        self.__front = -1
+        self.__rear = -1
+    
+    def isEmpty(self) :
+        return self.__front == -1
+    
+    def isFull(self) :
+        return (self.__rear + 1)%(self.__size) == self.__front
+    
+    def enqueue(self, value) :
+        if self.isFull() :
+            print("Queue is Full!!")
+            return
+        
+        if self.isEmpty() :
+            self.__front = 0
+        
+        self.__rear = (self.__rear + 1) % self.__size
+        self.__data[self.__rear] = value
+        print("삽입 완료")
+
+    def dequeue(self) :
+        if self.isEmpty() :
+            print("Queue is Empty!")
+            return -1
+
+        value = self.__data[self.__front]
+        
+        if self.__front == self.__rear :
+            self.__front = -1
+            self.__rear = -1
+        else :
+            self.__front = (self.__front + 1) % self.__size
+        
+        print(value)
+        
+        return value
+
+    def peek(self) :
+        if self.isEmpty() :
+            print("Queue is Empty!")
+            return -1
+
+        value = self.__data[self.__front]
+        
+        print(value)
+        
+        return value
+    
+    def info(self) :
+        if self.isEmpty() :
+            print("Queue is Empty!, Max Size is : {0}".format(self.__size))
+            return
+        
+        i = self.__front
+        result = "Queue List : [ "
+        while True:
+                result += str(self.__data[i])
+                if i == self.__rear :
+                    result += " ]"
+                    break
+                
+                result += ", "
+                i = (i + 1) % self.__size
+        
+        print("Max Size is : {0}".format(self.__size))
+        print(result)
+
+q = queue(int(input("원형큐의 최대사이즈를 입력해주세요 : ")))
+
+endFlag = True
+
+while endFlag :
+    opcode = input("명령어 목록 : enqueue [num] | dequeue | peek | info | exit\n")
+    
+    if "enqueue" in opcode :
+        if opcode.split()[0] != "enqueue" :
+            print("제대로 입력해주세요 enqueue와 정수를 입력받습니다.")
+            continue
+        q.enqueue(int(opcode.split()[1]))
+    elif opcode == "dequeue" :
+        q.dequeue()
+    elif opcode == "peek" :
+        q.peek()
+    elif opcode == "info" :
+        q.info()
+    elif opcode == "exit" :
+        endFlag = False
+        print("Exit")
+    else :
+        print("제대로 입력해주세요")

code_study/data_structure/DS_queue.swift

@@ -0,0 +1,117 @@
+class CircularQueue {
+    private var data: [Int]
+    private var front, rear, size : Int
+
+    init(size: Int){
+        self.front = -1
+        self.rear = -1
+        self.size = size
+        self.data = Array(repeating: 0, count: size)
+    }
+
+    func isEmpty() -> Bool {
+        return self.front == -1
+    }
+
+    func isFull() -> Bool {
+        return (self.rear + 1)%self.size == self.front
+    }
+
+    func info(){
+        if self.isEmpty(){
+            print("Empty!")
+            return
+        }
+        var i: Int = self.front
+        while true {
+            print("\(self.data[i]) ",terminator: " ")
+            if i == self.rear {
+                print()
+                break
+            }
+            i = (i+1)%self.size
+        }
+    }
+
+    func enqueue(to value: Int){
+        if self.isFull() {
+            print("Full!!!")
+            return
+        }
+
+        if self.isEmpty(){
+            self.front = 0
+        }
+        self.rear = (self.rear + 1)%self.size
+        self.data[self.rear] = value
+    }
+
+    func dequeue() -> Int? {
+        if self.isEmpty(){
+            return nil
+        }
+        let value: Int = self.data[self.front]
+        if(self.front == self.rear){
+            self.front = -1
+            self.rear = -1
+        }
+        else {
+            self.front = (self.front+1) % self.size
+        }
+
+        return value
+    }
+
+    func peek() -> Int? {
+        if self.isEmpty(){
+            return nil
+        }
+        return self.data[self.front]
+    }
+}
+
+let cirQueue: CircularQueue = CircularQueue(size: 10)
+var exitFlag: Bool = true
+
+while exitFlag {
+    print("명령어를 입력하세요 (enqueue [값], dequeue, peek, info, exit):")
+    if let input = readLine() {
+        let components = input.split(separator: " ")
+        let order = String(components.first ?? "")
+
+        switch order {
+            case "enqueue" :
+                if components.count == 2, let value = Int(components[1]) {
+                    cirQueue.enqueue(to: value)
+                    print("\(value) enqueue!")
+                }
+                else {
+                    print("enqueue 명령어 뒤에 공백에 이어서 숫자를 입력해야합니다.")
+                }
+            case "dequeue" :
+                if let value = cirQueue.dequeue(){
+                    print("\(value) dequeue!!")
+                }
+                else {
+                    print("Empty!!")
+                }
+            case "peek" :
+                if let value = cirQueue.peek(){
+                    print("\(value) peek!!")
+                }
+                else {
+                    print("Empty!!")
+                }
+            case "info" :
+                cirQueue.info()
+            case "exit" :
+                exitFlag = false
+                print("Exit!!!")
+            default :
+                print("제대로 된 명령어를 입력하세요")
+        }
+    }
+    else {
+        print("제대로 입력해주세요")
+    }
+}

code_study/data_structure/DS_queue.ts

@@ -0,0 +1,109 @@
+export {};
+
+class CircularQueue {
+    private data: number[];
+    private front: number;
+    private rear: number
+    private size: number;
+
+    constructor(size: number){
+        this.size = size;
+        this.rear = -1;
+        this.front = -1;
+        this.data = Array.from({length: size}, () => 0);
+    }
+
+    public isEmpty(): boolean{
+        return this.front === -1;
+    }
+
+    public isFull(): boolean{
+        return (this.rear + 1)%(this.size) === this.front;
+    }
+
+    public enqueue(value: number){
+        if(this.isFull()){
+            console.log("Queue is full!");
+            return;
+        }
+        if(this.isEmpty()){
+            this.front = 0;
+        }
+
+        this.rear = (this.rear + 1)%(this.size);
+        this.data[this.rear] = value;
+    }
+
+    public dequeue(): number | undefined {
+        if(this.isEmpty()) return undefined;
+        const value: number = this.data[this.front];
+        if(this.rear === this.front) {
+            this.rear = -1;
+            this.front = -1;
+        }
+        else {
+            this.front = (this.front + 1)%(this.size);
+        }
+        return value;
+    }
+
+    public peek(): number | undefined {
+        return (this.isEmpty()) ? undefined : this.data[this.front];
+    }
+
+    public info() {
+        if(this.isEmpty()){
+            console.log("Empty!");
+            return;
+        }
+        let result = "list : [";
+        let i = this.front;
+        while(true){
+            result += this.data[i].toString();
+            if(i === this.rear){
+                result += "]";
+                break;
+            }
+            i = (i+1)%(this.size);
+            result += ",";
+        }
+        console.log(result);
+    }
+}
+
+console.log("원형큐를 생성합니다. 사이즈를 입력해주세요.")
+const size: number = Number(require("fs").readFileSync(0,"utf8").toString().trim());
+let cq = new CircularQueue(size);
+let exitFlag: boolean = true;
+
+while(exitFlag){
+    console.log("++++++++++++++++명령어모음++++++++++++++++");
+    console.log("enqueue <value> | dequeue | peek | info | exit");
+    console.log("========================================");
+    console.log("명령어를 입력해주세요!");
+    const input:string[] = require("fs").readFileSync(0,"utf8").toString().trim().split(" ");
+    switch(input[0])
+    {
+        case "enqueue":
+            cq.enqueue(Number(input[1]));
+            break;
+        case "dequeue":
+            const deqvalue = cq.dequeue();
+            console.log(deqvalue===undefined ? "큐가 비었습니다." : deqvalue);
+            break;
+        case "peek":
+            const peekValue = cq.peek();
+            console.log(peekValue===undefined ? "큐가 비었습니다." : peekValue);
+            break;
+        case "info":
+            cq.info();
+            break;
+        case "exit":
+            exitFlag = false;
+            console.log("종료합니다.")
+            break;
+        default:
+            console.log("제대로 입력해주세요.")
+            break; 
+    }
+}