2023.5.5

 1 //new在堆区开辟数据，手动开辟，手动释放
 2 #include <iostream>
 3 using namespace std;
 4 //1.new的基本语法
 5 int* func()
 6 {
 7     //new返回的是指针
 8     int* p = new int(10);
 9     return p;
10 }
11 void test01()
12 {
13     int* p = func();
14     cout << *p << endl;
15     delete p;
16 }
17 //2.在堆区创建整型数组 
18 void test02()
19 {
20     //创建10个整型数据数组
21     int *arr = new int[10];
22     for (int i = 0; i < 10; i++)
23     {
24         arr[i] = i + 100;
25     }
26     for (int i = 0; i < 10; i++)
27     {
28         cout << arr[i]<< endl;
29     }
30     //delete数组
31     delete[] arr;
32 }
33 int main()
34 {
35     test01();
36     test02();
37     return 0;
38 }