Question

我正在尝试在SDL中编写一个跳棋游戏。当我编译代码时，我收到此错误：

std :: basic_ifstream＆gt; :: basic_ifstream（conststd :: basic_ifstream＆gt;＆amp;）'：尝试引用已删除的函数

从我在网上找到的内容来看，这意味着由于某种原因编译已经帮助删除了我的构造函数，现在它无法再找到它。（如果你问我，组织不好）为什么会这样？

Board.h：

#include <fstream>
class Board
{
public:
    SDL_Surface * boardSurface;
    int boardArray[8][8];
private:
    std::ifstream boardFile;
    SDL_Surface * blackPiece;
    SDL_Surface * whitePiece;
    SDL_Surface * darkSquare;
    SDL_Surface * lightSquare;

public:
    Board(char filename[], SDL_PixelFormat * format);
private:
    void loadFile(char filename[]);
    void makeSurface();
    void debugPrint();
    void debugBlit();
};

Board.cpp：

#include <SDL.h>
#include <fstream>
#include <iostream>
#include <stdlib.h>
#include "board.h"
#include "loaders.h"

Board::Board(char filename[], SDL_PixelFormat * format)
{
    //inits images
    loaders imageLoader;
    blackPiece = imageLoader.load_image("images/blackPiece.png", format);
    whitePiece = imageLoader.load_image("images/whitePiece.png", format);
    darkSquare = imageLoader.load_image("images/darkSquare.png", format);
    lightSquare = imageLoader.load_image("images/lightSquare.png", format);
    boardSurface = SDL_CreateRGBSurface(0, 780, 480, 8, 0, 0, 0, 0);
    loadFile(filename);
    debugPrint();
    debugBlit();
}
void Board::loadFile(char filename[])
{
    boardFile.open(filename);
    char currentLine[9] = {};
    for (int line = 0; line <= 7; line++)
    {
        boardFile.getline(currentLine, 9);
        for (int square = 0; square <= 7; square++)
        {
            int currentSquare = (int)currentLine[square] - '0'; 
            boardArray[line][square] = currentSquare;
        }
    }
}

void Board::makeSurface()
{

}

void Board::debugPrint()
{
    for (int line = 0; line <= 7; line++)
    {
        for (int square = 0; square <= 7; square++)
        {
            std::cout << boardArray[line][square];
        }
        std::cout << std::endl;
    }
}

void Board::debugBlit()
{
    for (int y = 0; y <= 4; y++)
    {
        if (SDL_BlitSurface(blackPiece, NULL, boardSurface, NULL) != 0)
        {
            std::cout << SDL_GetError();
        }
    }
}

Answer 1

发生错误是因为您有一个std::ifstream数据成员，并且您可能正在尝试在某处复制Board，或者有一些代码需要复制构造函数才能访问。

std::ifstream boardFile;

Board编译器提供的复制构造函数尝试复制流，但流不可复制。因此，您必须提供自己的复制构造函数来做一些聪明的事情，或者删除需要Board复制构造函数的代码。

试图引用已删除的功能（VS2013）

1 个答案: