/*
 new 與 delete
 C: malloc,free 用於動態申請內存
 C++：new 和 delete 用於動態的申請和釋放內存
*/
#include<iostream>
using namespace std;

int sum1() {
    int number1 = 11;
    int number2 = 22;
    return 0;
}

int sum2() {
    int number1 = 22;
    int number2 = 23;
    return 0;
}

int main() {
    int* number_point = new int;
    *number_point = 2;

    // number: 2, number_point: 0x5f0cb18f7eb0
    cout << "number: " << *number_point << ", number_point: " << number_point << endl;

    // 用於動態申請的內存需要進行釋放，delete
    delete number_point;

    // 內存問題，oom
    // new 的內存是放在堆區的，需要手動 delete 釋放內存，如果只 new 忘記 delete,總有一個時間內存會不夠用
    // 普通定義的變量 int number = 1; 是運行在棧空間裏的，隨着方法的退出數據會被銷燬(隨着後續的代碼運行數據會被覆蓋)
    
    return 0;
}