C++类的对象创建过程，小探索。

学习心得

class MyArray
{
public:
    explicit MyArray(int m_Capacity = 100);
    explicit MyArray(const MyArray &array1);
    ~MyArray();

private:
    int m_Capacity;
    int m_Size;
    int* p_Address;

};

MyArray::MyArray(int  m_Capacity):m_Capacity(m_Capacity){

    //this->m_Capacity = m_Capacity;
    this->m_Size = 0;
    this->p_Address = new int[this->m_Capacity];

    printf("%s\n", __FUNCSIG__);
}

MyArray::MyArray(const  MyArray& array1) {

    //MyArray* tmp = new MyArray;
    this->m_Size = array1.m_Size;
    this->m_Capacity = array1.m_Capacity;
    this->p_Address = new int[array1.m_Capacity];
    memcpy(this->p_Address,array1.p_Address,array1.m_Capacity*sizeof(int));


}




MyArray::~MyArray()
{
    if (this->p_Address)
    {
        delete[] this->p_Address;
    }

    this->m_Capacity = 100;
    this->m_Size = 0;

    printf("%s\n", __FUNCSIG__);
}

void test() {
    //MyArray p;  // 先MyArray::__autoclassinit2分配内存,直接调用  MyArray()默认构造
    MyArray p1(100); // 先MyArray::__autoclassinit2分配内存，在调用MyArray(int m_Capacity = 100)有参构造函数，

    MyArray p2(p1);// 先MyArray::__autoclassinit2分配内存，在调用MyArray::MyArray(const  MyArray& array1) copy构造

    printf("p1 :%x\n", &p1);
    printf("p2 :%x\n", &p2);


}

所有类的都会自动生成xxxxx::__autoclassinit2，默认由__autoclassinit2去分配内存，在看情况调用自定义的构造函数。
上述缺少new,new出来的对象也一样；
笔记笔记！