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hello-algo/ja/codes/cpp/chapter_stack_and_queue/array_stack.cpp
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Co-authored-by: krahets <krahets@163.com>
2025-10-17 05:04:43 +08:00

85 lines
1.8 KiB
C++

/**
* File: array_stack.cpp
* Created Time: 2022-11-28
* Author: qualifier1024 (2539244001@qq.com)
*/
#include "../utils/common.hpp"
/* 配列に基づくスタッククラス */
class ArrayStack {
private:
vector<int> stack;
public:
/* スタックの長さを取得 */
int size() {
return stack.size();
}
/* スタックが空かどうかを判定 */
bool isEmpty() {
return stack.size() == 0;
}
/* プッシュ */
void push(int num) {
stack.push_back(num);
}
/* ポップ */
int pop() {
int num = top();
stack.pop_back();
return num;
}
/* スタックトップ要素にアクセス */
int top() {
if (isEmpty())
throw out_of_range("Stack is empty");
return stack.back();
}
/* Vectorを返却 */
vector<int> toVector() {
return stack;
}
};
/* ドライバーコード */
int main() {
/* スタックを初期化 */
ArrayStack *stack = new ArrayStack();
/* 要素プッシュ */
stack->push(1);
stack->push(3);
stack->push(2);
stack->push(5);
stack->push(4);
cout << "Stack stack = ";
printVector(stack->toVector());
/* スタックトップ要素にアクセス */
int top = stack->top();
cout << "Top element of the stack top = " << top << endl;
/* 要素ポップ */
top = stack->pop();
cout << "Element popped from the stack = " << top << ", after popping";
printVector(stack->toVector());
/* スタックの長さを取得 */
int size = stack->size();
cout << "Length of the stack size = " << size << endl;
/* 空かどうかを判定 */
bool empty = stack->isEmpty();
cout << "Is the stack empty = " << empty << endl;
// メモリを解放
delete stack;
return 0;
}