포인터와 클래스 간의 상호 작용

저는 최근 Java 및 기타 고급 언어의 배경에서 오는 C ++를 배우기 위해 노력하고 있습니다. 포인터와 개체에 몇 가지 문제가 있었지만 포인터를 사용하여 사용자 지정 클래스로 만든 개체를 조작하는 방법을 정확하게 설명하는 좋은 리소스를 아직 찾지 못했습니다.

내 문제가있는 곳을 좁히기 위해 간단한 프로그램을 작성했습니다.

이 클래스의 맨 아래에있는 코드의 마지막 두 블록은 잘못되었으며 다른 부분에서도 몇 가지 잘못된 작업을 수행했을 것입니다. 도움을 주시면 감사하겠습니다.

#include <iostream>
#include <cstdlib>
#include <string.h>

using namespace std;

class Point {
public: 
    float x;
    float y;    
public: 
    Point(float x, float y) {
        this->x=x;
        this->y=y;
    }
    Point() {
        x=0.0f;
        y=0.0f;
    }
    ~Point() {
        x=0.0f;
        y=0.0f;
    }
};

class Place {
public: 
    string name;
    Point location;
public: 
    //Constructor with arguements.
    Place(string nam, Point loc) {
        name = nam;
        location = loc;
    }
    //Default constructor.
    Place() {
        name = "Default";
        location = {0.0f,0.0f};
    }
    //Destructor. This object contains no pointers so nothing to delete.
    ~Place() {

    }
public: 
    void setName(string nam) {
        name = nam;
    }
    void setLocation(Point loc) {
        location = loc;
    }
};

class PointerToAPlace {
public: 
    Place *place;
public:
    PointerToAPlace(Place *pl) {
        *place = *pl;
    }
    ~PointerToAPlace() {
        delete place;
    }
};

int main(int argc, char** argv) {
    std::cout << "\n";
    std::cout << "Make some places and hope they don't segfault.\n";


    /*Object created with default constructor. Will be automatically deleted at the end of this scope.*/
    Place placeA;
    std::cout << "Place named " << placeA.name.c_str() << " is at " << placeA.location.x << "," << placeA.location.y << " and is lovely.\n";
    //Output: Place named Default is at 0,0 and is lovely.


    /*Object created with bracket constructor. Will be automatically deleted at the end of this scope.*/
    Place placeB = {"Lordran", Point{12.2f,99.3f}};
    std::cout << "Place named " << placeB.name.c_str() << " is at " << placeB.location.x << "," << placeB.location.y << " and is lovely.\n";
    //Output: Place named Lordran is at 12.2,99.3 and is lovely.


    /*Object created with new keyword. This is a pointer and must be explicitly deleted.*/
    Place *placeC = new Place("Drangleic", Point{-123.34f,69.69f});
    std::cout << "Place named " << placeC->name.c_str() << " is at " << placeC->location.x << "," << placeC->location.y << " and is lovely.\n";
    delete placeC;
    //Output: Place named Drangleic is at -123.34,69.69 and is lovely.


    /*Array of objects, created with default constructor and not assigned any values. Will be automatically deleted at the end of this scope.*/
    Place placeD[3];
    std::cout << "Here are some places named: ";
    for(int i=0;i<3;i++) {
        std::cout << placeD[i].name.c_str();
        std::cout << (i<2 ? ", " : ". ");
    }
    std::cout << "They are quite the places!\n";
    //Output: Here are some places named: Default, Default, Default. They are quite the places!    


    /*Array of objects, created with default constructor and then assigned values. Will be automatically deleted at the end of this scope.*/
    Place placeE[5];
    string namesA[5] = {"Boletaria", "Stonefang", "Latria", "Shrine of Storms", "Valley of Defilement"};
    for(int i=0;i<5;i++) {
        placeE[i].setName(namesA[i]);
        placeE[i].setLocation(Point{1.23f, 3.21f});
    }
    std::cout << "Here are some places named: ";
    for(int i=0;i<5;i++) {
        std::cout << placeE[i].name.c_str();
        std::cout << (i<4 ? ", " : ". ");
    }
    std::cout << "They are quite the places!\n";
    //Output: Here are some places named: Boletaria, Stonefang, Latria, Shrine of Storms, Valley of Defilement. They are quite the places!


    /*Trying to do a pointer to an array of objects.*/
    Place *placeF[7];
    string namesB[7] = {"Astora", "Carim", "Thoroughland", "Catarina", "Baulder", "Vinheim", "Zena"};
    for(int i=0;i<7;i++) {
        placeF[i]->setName(namesB[i]);
        placeF[i]->setLocation(Point{2.23f, 6.21f});
    }
    std::cout << "Here are some places named: ";
    for(int i=0;i<7;i++) {
        std::cout << placeF[i]->name.c_str();
        std::cout << (i<6 ? ", " : ". ");
    }
    std::cout << "They are quite the places!\n";
    //Output: SEGFAULT D:

    /*Trying to put a pointer to a place into an object, then delete it.*/
    Place *placeG = new Place("Anor Londo", Point{-12312.34f,33.69f});
    PointerToAPlace pnt = {placeG};
    std::cout << "Place named " << pnt.place->name.c_str() << " is at " << pnt.place->location.x << "," << pnt.place->location.y << " and is lovely.\n";
    //Output: SEGFAULT :(

    return 0;
}