c++ - (.bss+0x0): 'player'的多重定义；

Question

我正在 ray lib 中创建一个游戏，并有一个带有 player 结构的播放器头文件，以使事情井井有条。我收到这个错误，说结构'player'有多个定义。

错误：

/usr/bin/ld: main.o:(.bss+0x0): multiple definition of `player'; player.o:(.bss+0x0): first defined here collect2: error: ld returned 1 exit status

播放器.cpp：

#include <raylib.h>
#include "player.h"

void InitPlayer() {

    player.x = 0;
    player.y = 0;

    player.tint = (Color)RAYWHITE;
    player.Frame = 0;
    player.FrameWidth = 16;
    player.MaxFrames = 3;
    player.animation_number = 0;
    player.timer = 0.0f;    

    player.flip = 1;

    //Load Texture2D
    player.playerTexture = LoadTexture("Sprites/PlayerAll.png");

}

void UpdatePlayer() {

player.timer += GetFrameTime();
    
if(player.timer >= 0.2f){
    
        player.timer = 0.0f;
        player.Frame += 1;  
}

if(IsKeyDown(KEY_S)) {
        player.animation_number = 16;   
        player.y += 1;  
    }else if(IsKeyUp(KEY_S)){
        player.animation_number = 0;
    }
    
    
    if(IsKeyDown(KEY_W)){
        player.animation_number = 32;
        player.y -= 1;
    }
    
    if(IsKeyDown(KEY_A)){
        player.animation_number = 48;
        player.x -= 1;'''
    }
        
    if(IsKeyDown(KEY_D)){
        player.animation_number = 48;
        player.x += 1;
        player.flip = -1;
    } else {
        player.flip = 1;
    }
    
    //Clamp frame value
    player.Frame = player.Frame % player.MaxFrames;

}

void DrawPlayer() {
    
DrawTexturePro(player.playerTexture,
        Rectangle{player.FrameWidth*player.Frame,(float)player.animation_number,(float)player.flip*16,16},
        Rectangle{(float)player.x,(float)player.y,16,16},
        Vector2{0,0},0,player.tint);
}

void UnloadPlayer() {
    
    UnloadTexture(player.playerTexture);
}

播放器.cpp：

#ifndef PLAYER_H
#define PLAYER_H

typedef struct Player{
    
    int x, y;
    Color tint; 

    int Frame;
    int FrameWidth;
    int MaxFrames;
    int animation_number;   
    float timer;    

    int flip;   
    Texture2D playerTexture;
        
}Player;

Player player;


void UnloadPlayer();
void InitPlayer();
void UpdatePlayer();
void DrawPlayer();
#endif

Main：main.cpp'文件基本上调用'player.h'文件中的函数。我在 'main.cpp' 中包含了 'player.h'

如果需要的话，只是为了提供一些额外的信息：我尝试在“播放器”上使用“extern”，但它要求我以奇怪的顺序编译 cpp 文件。在编译并链接对象'player.o'和'main.o'之后，我将'player.cpp'更改为在结构全局变量'player'上具有'extern'并仅编译'player.cpp'而不编译'main。 cpp' 并链接两个对象文件，其中 'main.o' 是旧的。

标签： c++game-developmentraylib