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Merge pull request #1 from deunlee/Queue
Add Queue and Fix Stack
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| #include <iostream> | ||
| using namespace std; | ||
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| #include "Queue.h" | ||
| using namespace Deun; | ||
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| int main() { | ||
| Queue q(3); | ||
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| cout << boolalpha; | ||
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| cout << "isEmpty(): " << q.isEmpty() << endl; | ||
| cout << endl; | ||
| cout << "enqueue(1): " << q.enqueue(1) << endl; | ||
| cout << "enqueue(2): " << q.enqueue(2) << endl; | ||
| cout << "enqueue(3): " << q.enqueue(3) << endl; | ||
| cout << "isFull(): " << q.isFull() << endl; | ||
| cout << "enqueue(4): " << q.enqueue(4) << endl; | ||
| cout << endl; | ||
| cout << "dequeue(): " << q.dequeue() << endl; | ||
| cout << "dequeue(): " << q.dequeue() << endl; | ||
| cout << "dequeue(): " << q.dequeue() << endl; | ||
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| try { | ||
| cout << "dequeue(): " << q.dequeue() << endl; | ||
| } | ||
| catch (QueueError err) { | ||
| cout << "dequeue(): ErrorCode " << (int)err << endl; | ||
| } | ||
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| cout << "isEmpty(): " << q.isEmpty() << endl; | ||
| cout << endl; | ||
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| cout << "enqueue(1): " << q.enqueue(1) << endl; | ||
| cout << "enqueue(2): " << q.enqueue(2) << endl; | ||
| cout << "dequeue(): " << q.dequeue() << endl; | ||
| cout << "enqueue(3): " << q.enqueue(3) << endl; | ||
| cout << "dequeue(): " << q.dequeue() << endl; | ||
| cout << "enqueue(4): " << q.enqueue(4) << endl; | ||
| cout << "enqueue(5): " << q.enqueue(5) << endl; | ||
| cout << "dequeue(): " << q.dequeue() << endl; | ||
| cout << "dequeue(): " << q.dequeue() << endl; | ||
| cout << "enqueue(6): " << q.enqueue(6) << endl; | ||
| cout << "dequeue(): " << q.dequeue() << endl; | ||
| cout << "dequeue(): " << q.dequeue() << endl; | ||
| cout << "isEmpty(): " << q.isEmpty() << endl; | ||
|
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| return 0; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| #include "Queue.h" | ||
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| namespace Deun { | ||
| Queue::Queue(unsigned int size) { | ||
| this->size = size; | ||
| count = front = rear = 0; | ||
| elements = new (std::nothrow) int[size]; | ||
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| if (!elements) { | ||
| this->size = 0; | ||
| throw QueueError::QUEUE_ALLOCATION_FAILED; | ||
| } | ||
| } | ||
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| Queue::~Queue() { | ||
| delete[] elements; | ||
| } | ||
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| bool Queue::isEmpty() { | ||
| return (count == 0); | ||
| } | ||
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| bool Queue::isFull() { | ||
| return (count == size); | ||
| } | ||
|
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| unsigned int Queue::getSize() { | ||
| return size; | ||
| } | ||
|
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| unsigned int Queue::getCount() { | ||
| return count; | ||
| } | ||
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| // front : 원소를 삭제할 자리 (채워져 있는 상태, 단, count가 0이면 비워져 있음) | ||
| // rear : 원소를 삽입할 자리 (비어있는 상태) | ||
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| bool Queue::enqueue(int element) { | ||
| if (isFull()) { | ||
| return false; | ||
| } | ||
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| count++; | ||
| elements[rear] = element; | ||
| rear = (rear + 1) % size; | ||
| return true; | ||
| } | ||
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| int Queue::dequeue() { | ||
| if (isEmpty()) { | ||
| throw QueueError::QUEUE_IS_EMPTY; | ||
| } | ||
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| count--; | ||
| int result = elements[front]; | ||
| front = (front + 1) % size; | ||
| return result; | ||
| } | ||
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| int Queue::peek() { | ||
| if (isEmpty()) { | ||
| throw QueueError::QUEUE_IS_EMPTY; | ||
| } | ||
|
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| return elements[front]; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| #ifndef __DEUN_QUEUE__ | ||
| #define __DEUN_QUEUE__ | ||
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| #include <new> | ||
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| namespace Deun { | ||
| enum class QueueError { | ||
| QUEUE_ALLOCATION_FAILED, | ||
| QUEUE_IS_EMPTY, | ||
| }; | ||
|
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| // 배열 기반 원형 큐 | ||
| class Queue { | ||
| private: | ||
| int* elements; | ||
| unsigned int size; // 큐의 크기 (배열 원소의 개수) | ||
| unsigned int count; // 채워진 데이터의 개수 | ||
| // (count 변수를 사용하지 않아도 큐의 공백/포화 상태를 | ||
| // 검출할 수 있지만, 배열의 원소 중 하나를 비워두어야 한다. | ||
| // 이것이 별로 마음에 들지 않아 count 변수를 사용하기로 하였다.) | ||
| unsigned int front; // 원소를 삭제할 자리 | ||
| unsigned int rear; // 원소를 삽입할 자리 | ||
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| public: | ||
| Queue(unsigned int size = 100); | ||
| ~Queue(); | ||
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| bool isEmpty(); | ||
| bool isFull(); | ||
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| unsigned int getSize(); | ||
| unsigned int getCount(); | ||
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| bool enqueue(int element); // 맨 뒤에 삽입 (성공시 true, 실패시 false) | ||
| int dequeue(); // 맨 앞 원소 반환 및 삭제 (실패시 throw) | ||
| int peek(); // 맨 앞 원소 반환 (실패시 throw) | ||
| }; | ||
| } | ||
|
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||
| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,159 @@ | ||
| <?xml version="1.0" encoding="utf-8"?> | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
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