【发布时间】：2016-03-24 07:28:26
【问题描述】：
我正在尝试使用 Opengl、SDL 和 GL 使用 C++ 创建一个 Snake 游戏，尽管我已经正确链接了所有内容我在构建时遇到了一堆错误，我环顾四周发现这些错误在使用 GL 时很常见尽管我似乎无法确定为什么要得到它们，因为我已经采取了预防措施，例如在包含“GL/freeglut.h”之前包含“windows.h”，有人可以帮忙吗？
包含的错误有：
error C2144: syntax error : 'void' should be preceded by ';'
Error C2144 syntax error: 'void' should be preceded by ';' OpenGLTutorial c:\program files (x86)\windows kits\8.1\include\um\gl\gl.h 1157
Error C4430 missing type specifier - int assumed. Note: C++ does not support default-int OpenGLTutorial c:\program files (x86)\windows kits\8.1\include\um\gl\gl.h 1157
Error C2182 'APIENTRY': illegal use of type 'void' OpenGLTutorial c:\program files (x86)\windows kits\8.1\include\um\gl\gl.h 1157
Error C2146 syntax error: missing ';' before identifier 'glAccum' OpenGLTutorial c:\program files (x86)\windows kits\8.1\include\um\gl\gl.h 1157
Error C2144 syntax error: 'void' should be preceded by ';' OpenGLTutorial c:\program files (x86)\windows kits\8.1\include\um\gl\gl.h 1157
Error C4430 missing type specifier - int assumed. Note: C++ does not support default-int OpenGLTutorial c:\program files (x86)\windows kits\8.1\include\um\gl\gl.h 1157
Error C2182 'APIENTRY': illegal use of type 'void' OpenGLTutorial c:\program files (x86)\windows kits\8.1\include\um\gl\gl.h 1157
Error C2146 syntax error: missing ';' before identifier 'glAccum' OpenGLTutorial c:\program files (x86)\windows kits\8.1\include\um\gl\gl.h 1157
主要 cpp
#ifdef __MINGW32__
#include <windows.h>
#endif
#ifdef WIN32
#include <windows.h>
#endif
#include <GL/freeglut.h>
#include <SDL2/SDL.h>
#include <time.h>
#include "SnakeGame.hpp"
int main(void) {
srand(time(NULL));
SnakeGame *f = new SnakeGame();
f->run();
return 0;
}
Arena.hpp
#ifdef _WIN32
#include <windows.h>
#endif
#include <GL/freeglut.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <math.h>
#include "Obstacle.hpp"
#include "Fruit.hpp"
#include "Snake.hpp"
#include "Font.hpp"
class Arena {
public:
Arena(void);
virtual ~Arena(void);
void update(void);
inline void draw(void);
Snake *snake;
private:
float rot;
unsigned int score;
Font *font;
inline void correct_elements(void);
void drawRainbowTriangle(void);
void correct_fruit(void);
void correct_obstacle(void);
void correct_snake(void);
bool is_snake_dead(void);
bool is_snake_eating(void);
Obstacle *obstacle;
Fruit *fruit;
};
Element.hpp
#include <iostream>
#include <ostream>
#include <GL/freeglut.h>
#include <GL/gl.h>
class Element {
public:
Element();
virtual void draw() = 0;
int getX();
int getY();
void setX(int it);
void setY(int it);
void display();
protected:
int x;
int y;
};
字体.hpp
#include <GL/freeglut.h>
#include <string.h>
class Font {
public:
void bitmap_output(int x, int y, const char *string, void *font = GLUT_BITMAP_TIMES_ROMAN_24);
private:
};
Fruit.hpp
#include <GL/freeglut.h>
#include <GL/gl.h>
#include "Element.hpp"
class Fruit : public Element {
public:
void draw();
};
Game.hpp
include <SDL2/SDL.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/freeglut.h>
class Game {
public:
Game();
~Game();
virtual void run()=0;
int get_score();
void set_score(int s);
bool paused;
private:
protected:
SDL_Renderer* displayRenderer;
SDL_Window* displayWindow;
SDL_RendererInfo displayRendererInfo;
};
Snake.hpp
#include <iostream>
#include <list>
#include <GL/gl.h>
#include <GL/freeglut.h>
#include "Element.hpp"
enum Dir {UP, DOWN, RIGHT, LEFT};
class Body : public Element {
public:
void draw() {
glColor3ub(0, 0, 255);
glPushMatrix();
glTranslatef(x, y, -y);
glutSolidCube(1);
glPopMatrix();
}
};
class Snake {
public:
Snake();
~Snake();
void update(void);
void draw(void);
void grow(int size);
void setDir(Dir direction);
std::list<Body> body;
std::list<Body>::iterator iter;
private:
Dir dir;
};
Snake game.hpp
#ifdef _WIN32
#include <windows.h>
#endif
#include <stdlib.h>
#include <SDL2/SDL.h>
#include <GL/glu.h>
#include <GL/gl.h>
#include "Arena.hpp"
#include "Game.hpp"
class SnakeGame : public Game {
public:
SnakeGame();
virtual ~SnakeGame();
void run();
private:
bool is; //is the game running
Arena arena;
void keyboard(const SDL_Event &event);
};
【问题讨论】：
-
请编辑您的问题以包含未编辑的 complete 错误输出。还要指出 where 在显示的代码中出现错误（例如通过添加注释）。最后，您确实显示的错误说明了
glAccum，但您不会在显示的代码中的任何地方调用它。请尝试创建Minimal, Complete, and Verifiable Example 并展示给我们。
标签： c++ opengl sdl glew freeglut