調試ECX_BAD_ACCESS錯誤C++

Question

任何想法如何使用以下代碼修復以下錯誤？這是在Xcode的C++環境中。

// 
// main.cpp 
// Chess 
// 
// Created by Akshar Ramkumar on 9/29/16. 
// Copyright © 2016 Akshar Ramkumar. All rights reserved. 
// 

#include "Declarations.hpp" 
#include "DeclarationsMain.hpp" 
extern simplePiece TotalBoard[8][8]; 
using namespace std; 
int main() { 




    Piece All[32]; 
    start(All); 
    char rawinput[4]; 
    char fxinput; 
    char fyinput; 
    char txinput; 
    char tyinput; 
    while(true){ 
     Turn=not Turn; 
     if(Turn==true){ 
      TurnColor="white"; 

     } 


     else { 

      TurnColor="black"; 

     } 

     cout<<"It is "<<TurnColor<<"'s turn"<<endl; 
     cout<<"Enter the x and y coordinates you want to move from 0-7, 0-7 (no spaces in between)"<<endl; 
     cin>>rawinput; 
     fxinput=rawinput[0]; 
     fyinput=rawinput[2]; 
     cout<<"Enter the x and y coordinates you want to move to 0-7, 0-7 "<<endl; 
     cin>>rawinput; 
     txinput=rawinput[0]; 
     tyinput=rawinput[2]; 
     if(TotalBoard[fxinput][fyinput].Color==Turn and TotalBoard[fxinput][fyinput].Color==true){ 

      TotalBoard[txinput][tyinput]=TotalBoard[fxinput][fyinput]; 
      TotalBoard[fxinput][fyinput].Color=false; 
      TotalBoard[fxinput][fyinput].Type=0; 
      TotalBoard[fxinput][fyinput].exists=false; 






     } 



    } 


    return 0; 
} 

下一頁：

// 
// Classes.cpp 
// Chess 
// 
// Created by Akshar Ramkumar on 10/13/16. 
// Copyright © 2016 Akshar Ramkumar. All rights reserved. 
//Pawn = 0 
//Rook = 1 
//Knight = 2 
//Bishop = 3 
//King = 4 
//Queen = 5 

#include "Declarations.hpp" 
#include "DeclarationsBoard.hpp" 
void start(Piece All[32]){ 
    int TypeArray[32]; 
    int xValues[32]; 
    int yValues[32]; 
    std::ifstream startstate; 
    std::fstream boardstate; 
    std::string numread; 
    char delim=' '; 
    startstate.open("/Users/aksramk/Google Drive/For Fun/Programming/Pascal C++/Chess/boardstatestart.txt") 
    ; 
    boardstate.open("/Users/aksramk/Google Drive/For Fun/Programming/Pascal C++/Chess/boardstatecurrent.txt"); 
    for(int i=0;i<32;i++){ 
     getline(startstate, numread,delim); 


     TypeArray[i]=atoi(numread.c_str()); 

    } 

    for(int i=0;i<32;i++){ 
     getline(startstate, numread, delim); 


     xValues[i]=atoi(numread.c_str()); 
    } 

    for(int i=0;i<32;i++){ 
     getline(startstate, numread, delim); 


     yValues[i]=atoi(numread.c_str()); 

    } 


    for (int i=0;i<32;i++){ 


     All[i].Type = TypeArray[i]; 
     All[i].y = yValues[i]; 
     All[i].x = xValues[i]; 
     All[i].Color = true; 
     All[i].Captured = false; 


     if (i>15){ 
      All[i].Color = false; 
     } 
    } 
    startstate.close(); 
    for(int i=0;i<32;i++){ 

     boardstate<<TypeArray[i]; 
     boardstate<<" "; 

    } 
    for(int i=0;i<32;i++){ 

     boardstate<<xValues[i]; 
     boardstate<<" "; 

    } 
    for(int i=0;i<32;i++){ 

     boardstate<<yValues[i]; 
     boardstate<<" "; 

    } 

    for(int i=0;i<32;i++){ 
     boardstate<<0; 
     boardstate<<" "; 

    } 
    boardstate.close(); 
    ; 

    for(int i=0;i<8;i++){ 
     for(int j=0;j<8;j++){ 
      simplePiece temp; 

      for(int k=0;k<32;k++){ 
       Piece temp2=All[k]; 
       if(temp2.x==i and temp2.y==j){ 

        temp.Type=temp2.Type; 
        temp.Color=temp2.Color; 
        temp.exists=true; 
       } 

      } 
      TotalBoard[i][j]=temp; 

     } 
    } 


    }; 

接頭：

// DeclarationsMain.h 
// Chess 
// 
// Created by Akshar Ramkumar on 11/22/16. 
// Copyright © 2016 Akshar Ramkumar. All rights reserved. 
// 

#ifndef DeclarationsMain_h 
#define DeclarationsMain_h 
bool Turn=false; 
std::string TurnColor; 

#endif /* DeclarationsMain_h */ 

下一頁：

// 
// DeclarationsBoard.h 
// Chess 
// 
// Created by Akshar Ramkumar on 11/22/16. 
// Copyright © 2016 Akshar Ramkumar. All rights reserved. 
// 

#ifndef board 
#define board 
simplePiece TotalBoard[8][8]; 

#endif 

下一頁：

// 
// DataStructures.hpp 
// Chess 
// 
// Created by Akshar Ramkumar on 10/18/16. 
// Copyright © 2016 Akshar Ramkumar. All rights reserved. 
// 


#ifndef iostream 
#define iostream 
#include <iostream> 
#include <fstream> 


#endif 

#ifndef piece 
#define piece 
class Piece { 
    public: 
     int Type; 
     int x; 
     int y; 
     bool Captured; 
     bool Color; 


}; 

struct simplePiece{ 
    bool Color=false; 
    int Type=0; 
    bool exists=false; 


}; 
void start(Piece All[32]); 
#endif 

線：

TotalBoard[txinput][tyinput]=TotalBoard[fxinput][fyinput]; 

引發錯誤：「線程1：ECX_BAD_ACCESS（代碼= 2，地址= 0x100009bac）。

有沒有人有任何關於如何解決這個問題的想法？

非常感謝，對於簡單的問題感到抱歉（我是初學者）。

Answer 1

從您的代碼相關部分：

char rawinput[4]; 

cin>>rawinput; 
fxinput=rawinput[0]; 
fyinput=rawinput[2]; 

這裏的輸入操作讀取一個「字」（基本上是文本無空格）轉換成字符數組。假設用戶輸入「1 2」。這裏的第一個詞是「1」。然後，rawinput數組保存一個C字符串，其中包含「1」的ASCII值，後跟一個空字節。

rawinput[0]然後49

rawinput[2]是那麼一些不確定的值，不管在那裏了。

---

一種解決方案是使用int變量：如果您使用調試器來逐步在同一時間你的一行代碼

int x; 
int y; 

cin >> x >> y;