C++ 编译器错误 2086 重新定义

Question

我有一个 .cpp必须包含 Console.h 的文件.在文件中，我正在尝试创建 map (稍后用于游戏)。

错误 C2086:'int nMapArray[15][20]:重新定义

#include "Console.h"
#include <Windows.h>
#include <stdint.h>

// Map dimensions
#define MAP_WIDTH   20
#define MAP_HEIGHT  15


// Tile Types
#define TILE_FLOOR      0
#define TILE_WALL       1


// Map declaration
int nMapArray[ MAP_HEIGHT ][ MAP_WIDTH ];

// Map Layout
int nMapArray[ MAP_HEIGHT ][ MAP_WIDTH ]= 
{
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
            { 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 },
            { 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0 },
            { 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0 },
            { 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0 },
            { 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0 },
            { 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0 },
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
};

我知道我只应该声明 nMapArray一次，但我不确定要丢弃哪一个。如果我丢弃 int nMapArray[ MAP_HEIGHT ][ MAP_WIDTH ];那么它将产生两个错误:
LNK2019:未解析的外部符号
和
LNK1120: Unresolved external 因素

做了一些谷歌搜索，但我仍然找不到修复程序，因此将不胜感激。

编辑:
好的，所以遵循许多人的建议来摆脱第一次初始化。从这里我得到两个错误:

错误 LNK2019:函数“void __cdecl DrawTile(int,int)”中引用了未解析的外部符号“公共(public):虚拟类 IConsole & __thiscall Win32Console::Color(unsigned short)”(?Color@Win32Console@@UAEAAVIConsole@@G@Z) (?DrawTile@@YAXHH@Z)

和

错误 LNK1120:1 Unresolved external

完整代码:

#include "Console.h"
#include <Windows.h>
#include <stdint.h>

// Map dimensions
#define MAP_WIDTH   20
#define MAP_HEIGHT  15


// Tile Types
#define TILE_FLOOR      0
#define TILE_WALL       1

// Map Layout
int nMapArray[ MAP_HEIGHT ][ MAP_WIDTH ]= 
{
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
            { 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 },
            { 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0 },
            { 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0 },
            { 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0 },
            { 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0 },
            { 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0 },
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
            { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
};

void DrawMap( void );
bool IsPassable( int x, int y );
void DrawTile( int x, int y );

int main( void )
{
    console.SetTitle( "Article Two Demo" );

    // Declare the player's position
    int nPlayerX = 4;
    int nPlayerY = 4;

    // Main game loop
    while( true )
    {
        // Draw the map
        DrawMap();

        // Draw the player to the screen
        console.Color( RED );
        console.Position( nPlayerX, nPlayerY );
        console << '@';

        // Input phase - Wait for the player to do something
        KEYPRESS sKeyPress = console.WaitForKeypress();

        // Process the input
        switch( sKeyPress.eCode )
        {
            // Move up
            case CONSOLE_KEY_UP:
                // Can we move to the tile above?
                if( IsPassable(nPlayerX, nPlayerY-1) )
                {
                    // Move up
                    nPlayerY--;
                }
                break;

            // Move left
            case CONSOLE_KEY_LEFT:
                // Can we move to the tile to the left of the player?
                if( IsPassable(nPlayerX-1, nPlayerY) )
                {
                    // Move left
                    nPlayerX--;
                }
                break;

            // Move right
            case CONSOLE_KEY_RIGHT:
                // Can we move to the tile to the right of the player
                if( IsPassable(nPlayerX+1, nPlayerY ) )
                {
                    // Move right
                    nPlayerX++;
                }
                break;

            // Move down
            case CONSOLE_KEY_DOWN:
                // Can we move to the tile below the player?
                if( IsPassable(nPlayerX, nPlayerY+1) )
                {
                    // Move down
                    nPlayerY++;
                }
                break;

            // Escape key
            case CONSOLE_KEY_ESCAPE:
                // Quit the program
                return 0;

            // Ignore any other keys
            default:
                break;
        }
    }

    // If execution gets here, the program is done
    return 0;
}

// IsPassable Function ///////////////////////////////////////////////////////////////////
//
//  This function analyzes the coordinates of the map array specified and returns
//  true if the coordinate is passable (able for the player to occupy), false if not.
//
bool IsPassable( int x, int y )
{
    // Before we do anything, make darn sure that the coordinates are valid
    if( x < 0 || x >= MAP_WIDTH || y < 0 || y >= MAP_HEIGHT )
        return false;

    // Store the value of the tile specified
    int nTileValue = nMapArray[y][x];

    // Return true if it's passable
    if( nTileValue == TILE_FLOOR)
        return true;

    return false;
}

// DrawMap Function //////////////////////////////////////////////////////////////////////
//
//  This function draws the entire map to the screen.
//
void DrawMap( void )
{
    for( int y = 0; y < MAP_HEIGHT; y++ )
    {
        for( int x = 0; x < MAP_WIDTH; x++ )
        {
            DrawTile(x, y);
        }
    }   
}

// DrawTile Function /////////////////////////////////////////////////////////////////////
//
//  Draws a map tile for the map coordinates specified.
//
void DrawTile( int x, int y )
{
    console.Position( x, y );
    switch( nMapArray[y][x] )
    {
        case TILE_FLOOR:
            console.Color( GREY );
            console << '.';
            break;

        case TILE_WALL:
            console.Color( GREY );
            console << '#';
            break;

    }
}

//////////////////////////////////////////////////////////////////////////////////////////

在 Console.h我还没有把布局放进去(因为我不完全确定怎么做)。

Answer 1

摆脱第一个，没有初始化的那个。

这解决了编译器问题，链接器错误是另一回事。它们出现的原因仅仅是因为一旦修复了双重声明，编译阶段就开始工作了。

然后我建议您发布另一个问题，其中包含有关链接器问题的更多详细信息。