Question

我一直在为OOP类进行社交网络模拟项目，并遇到了上述错误。由于我还是C ++的新手，因此内存管理使我有些困惑。

自从我将Visual Studio（Windows）用于我的IDE以来，我已经尝试使用提供的调试方法来查明问题所在。

尽管我无法查明导致内存损坏的原因。

代码：

User.h

#pragma once
class Message;
#include "Message.h"
#include <list>
#include <map>

class User 
{
private:
    std::string u_name;
    std::string u_email;
    std::list<User> friend_list;
//  std::list<FriendRequest> sent_Req;
//  std::list<FriendRequest> rec_Req;
//  std::unique_ptr<Wall> my_Wall;
public:
    User() = delete;
    User(const std::string& name, const std::string& email);
    virtual ~User();

    void send_friend_request();
    //void accept_frnd_reqst(FriendRequest fr);
    //void deny_frnd_reqst(FriendRequest fr);
    void deletefriend(User usr);
    void publ_msg_to_wall(/* Wall* to_wall */);
    void publ_msg_reply(Message* to_msg);
    void like_msg(Message* liked_msg);

    std::map<User, std::list<User>> frnd_list();

    void set_uname(std::string uname);
    void set_uemail(std::string email);

    std::string get_uname();
    std::string get_uemail();

};

User.cpp

#include "pch.h"
#include "User.h"
#include <iostream>


User::User(const std::string & name, const std::string& email)
    : u_name(name),u_email(email),wall(15)
{
}

User::~User()
{
}

void User::send_friend_request()
{
    //Should create a friend request instance 
    //and add it to the list :
    //of received requests of desired user
    //of sent requests from this user.
}

void User::publ_msg_to_wall(/* Wall* to_wall */)
{
    User* publ = this;
    std::string txt;
    getline(std::cin, txt);
    Message tmp_msg(publ, txt);
    // now publish that to the specified wall :
    // add it to specified wall's list of messages.
    // to_wall->post(tmp_msg)
    // NOTE: Make sure to copy it! we dont want to lose the message once the function goes out of scope.
    std::cout << "Done." << std::endl;
}

Message.h

#pragma once
#include "User.h"
//#include "ReplyMessage.h"
#include <string>
#include <chrono>
#include <list>

class Message
{
private:
    time_t timestamp;
    std::string msg_txt;
    std::unique_ptr<User> msg_creator;
//  std::unique_ptr <ReplyMessage> next_reply;
    int like_counter;
    std::list<User> likedfrom;

public:
    Message() = delete;
    Message(User* wr_user, std::string txt);
    virtual ~Message();

    void toString();
};

Message.cpp

#include "pch.h"
#include "Message.h"

Message::Message(User* wr_user, std::string txt)
    :msg_txt(txt),msg_creator(wr_user)
{
    timestamp = time(0);
}

Message::~Message()
{
}

主要

#include "pch.h"
#include <iostream>
#include "Message.h"
#include "User.h"

int main()
{
    User user1("john","sss");
    user1.publ_msg_to_wall();
    std::cout << "Hello World!\n";

}

我猜想这与在函数Message中初始化publ_msg_to_wall对象有关。这是因为错误发生在程序输出Hello World之前。如果有人告诉我如何“保持”或复制在Message函数中创建的publ_msg_to_wall的实例，也将不胜感激。

调试断言失败！堆（_CtrIsValidHeapPointer（block））C ++

0 个答案: