C++ object instantiation, taking the example of assigning x and y from the stack or from the heap

1. Subject requirements: arbitrary assignment of x and y from the stack or instantiation from the heap

2. The code is as follows:

#include <iostream>
#include <stdlib.h>
using namespace std;

class Coordinate
{
public:
    int x;
    int y;
    void printX()
    {
        cout << x << endl;
    }
    void printY()
    {
        cout << y << endl;
    }
};
int main(void)
{
    //从栈中实例化对象
    Coordinate coor;
    coor.x = 10;
    coor.y = 20;
    coor.printX();
    coor.printY();
    //从堆中实例化对象
    Coordinate *p = new Coordinate();
    if(NULL == p)
    {
        //failed
        return 0;
    }
    p->x = 100;
    p->y = 200;
    p->printX();
    p->printY();
    delete p;
    p = NULL;

    system("pause");
    return 0;
}

3. Run as follows:

 

 4. Although so much code is written, just to assign values ​​to x and y, but you can clearly see the difference between instantiating objects from the stack or the heap

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