C ++：静态指针，静态对象和动态内存分配 [英] C++: Static pointers, static objects and dynamic memory allocation

问题描述

请考虑以下代码段：

#include <iostream>
using namespace std;

class p
{
    public:
    int* q;
    p()
    {
        q = new int(100);
    }
    ~p(){
        delete q;
    }
};

static p* p1 = new p();
static p p2;

int main() {
    // your code goes here
    std::cout << *(p1->q);
    std::cout << *(p2.q);

    delete p1;
}

p1和p2是静态变量，它们必须存储在静态段中。 / p>

p1 and p2 are static vars, they have to stored in static segment.

1. 由于p1是指针，是仅将指针地址存储在静态段中还是指向它的对象？

1. since p1 is a pointer, is only the pointer address stored in static segment or even the object it points to?

p2是普通的静态对象，但是它包含动态分配的成员变量q，q也存储在静态段中吗？

p2 is a normal static object, but it contains a dynamically allocated member variable q,so is q also stored in static segment?

推荐答案

1. p1 是一个指针，它存储在静态段中（我不确定这是正确的术语），对象或内存 p1 指向的是在堆上。

1. p1 is a pointer, it's stored in static segment (I am not sure it's the right term), the object or memory p1 points to is on heap.

p2 是一个对象，存储在静态段中。 q 是 p2 内的指针，对象或内存 q 指向堆中。

p2 is an object, it's stored in static segment. q is a pointer inside p2, the object or memory q points to is on heap.

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