Question

我有一个简单的类游戏，它包含两个字段int N和bool isVerbalOn。我为这个类编写了一个operator =（复制赋值运算符），但是当我尝试使用该运算符时，我得到一个＆＃34;分段错误（核心转储）＆＃34;错误，并且运营商=没有被叫，即我没有看到＆＃34;在游戏oeprator =＆＃34;打印。下面附上课程和主要课程，以方便您：

Game.h：

#ifndef GAME_H_
#define GAME_H_

#include <iostream>

using namespace std;

class Game {
    private:
        int N;
        bool isVerbalOn;
    public:
        Game(char* configurationFile); // implemented and works perfectly
        void init(); // implemented and works perfectly
        void play(); // empty implementation
        void printState(); // implemented
        void printWinner(); // emtpy implementation
        void printNumberOfTurns(); // empty implementation
        Game & operator=(const Game &game_);
        ~Game(); // implemented and works perfectly
};

#endif

Game.cpp：

#include "../include/Game.h"
#include <fstream>
#include <iterator>
#include <sstream>

// .. functions implemented

Game &Game::operator=(const Game &game_) {
    cout << "Game operator=" << endl;
    if(this == &game_) {
        return *this;
    }
    N = game_.N;
    isVerbalOn = game_.isVerbalOn;
    return *this;
}

main.cpp中：

#include <iostream>
#include "../include/Game.h"

using namespace std;

int main(int argc, char **argv) {
    char* configurationFile = argv[1];

    Game game = Game(configurationFile);
    game.init();
    Game initializedGame = game; // operator= isn't called
    game.play();

    cout << endl;
    cout << "----------" << endl;
    cout<<"Initial State:"<<endl;
    initializedGame.printState();
    cout<<"----------"<<endl;
    cout<<"Final State:"<<endl;
    game.printState();
    return 0;
}

Makefile编译时没有错误或警告，输出为：

----------
Initial State:
Deck: 2H 2S QD
Alice:2C 3D 3S JH QH KC AH 
Bob:3C JS QC KH KS AD AS 
Charlie:2D 3H JC JD QS KD AC 
----------
Final State:
Deck: 2H 2S QD
Alice:2C 3D 3S JH QH KC AH 
Bob:3C JS QC KH KS AD AS 
Charlie:2D 3H JC JD QS KD AC 
Game destructor
Deck destructor
Segmentation fault (core dumped)

如您所见，游戏运营商中的打印=＆＃34;游戏运营商=＆＃34;本应该在其他任何事情之前打印出来，但这并不会发生。

P.S。我在SOF上检查了很多关于此问题的其他问题，并没有找到任何帮助我的东西。感谢任何帮助，谢谢。

Answer 1

Game initializedGame = game; // operator= isn't called

这将调用复制辅助器。

在Game.cpp中添加以下复制构造函数

Game(const Game &game_) {
    cout << "Game copy ctro" << endl;
    N = game_.N;
    isVerbalOn = game_.isVerbalOn;
}

优选地

Game(const Game &game_):N(game_.N), isVerbalOn(game_.isVerbalOn)
{}

Answer 2

Game initializedGame = game; // operator= isn't called

不，它不会。

这是一个声明和初始化，调用复制构造函数。

尽管此行中=字符的外观如此，但赋值运算符与它无关。

operator = isn未被调用，分段错误

2 个答案: