可以提供一个比较简短简单的C语言OpenGL编写的双人贪吃蛇代码吗

好的，以下是一个简单的C语言OpenGL编写的双人贪吃蛇游戏代码示例：

#include <stdio.h>
#include <stdlib.h>
#include <GL/glut.h>

#define WIDTH 400
#define HEIGHT 400
#define INIT_X 10
#define INIT_Y 10
#define INIT_LEN 3

int snake1_x[100], snake1_y[100], snake2_x[100], snake2_y[100];
int snake1_len = INIT_LEN, snake2_len = INIT_LEN;
int dir1 = 1, dir2 = 1;
int food_x, food_y;

void init() {
    glClearColor(0.0, 0.0, 0.0, 0.0);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluOrtho2D(0, WIDTH, 0, HEIGHT);
    snake1_x[0] = INIT_X;
    snake1_y[0] = INIT_Y;
    snake2_x[0] = WIDTH - INIT_X;
    snake2_y[0] = HEIGHT - INIT_Y;
    for (int i = 1; i < INIT_LEN; i++) {
        snake1_x[i] = snake1_x[i-1] + 10;
        snake1_y[i] = snake1_y[i-1];
        snake2_x[i] = snake2_x[i-1] - 10;
        snake2_y[i] = snake2_y[i-1];
    }
    food_x = rand() % (WIDTH/10) * 10;
    food_y = rand() % (HEIGHT/10) * 10;
}

void drawFood() {
    glColor3f(1.0, 0.0, 0.0);
    glRectf(food_x, food_y, food_x+10, food_y+10);
}

void drawSnake(int x[], int y[], int len) {
    glColor3f(0.0, 1.0, 0.0);
    for (int i = 0; i < len; i++) {
        glRectf(x[i], y[i], x[i]+10, y[i]+10);
    }
}

void display() {
    glClear(GL_COLOR_BUFFER_BIT);
    drawFood();
    drawSnake(snake1_x, snake1_y, snake1_len);
    drawSnake(snake2_x, snake2_y, snake2_len);
    glutSwapBuffers();
}

void moveSnake(int x[], int y[], int len, int dir) {
    for (int i = len-1; i > 0; i--) {
        x[i] = x[i-1];
        y[i] = y[i-1];
    }
    switch(dir) {
        case 1: // right
            x[0] += 10;
            break;
        case 2: // up
            y[0] += 10;
            break;
        case 3: // left
            x[0] -= 10;
            break;
        case 4: // down
            y[0] -= 10;
            break;
    }
}

void checkFood(int x[], int y[], int len) {
    if (x[0] == food_x && y[0] == food_y) {
        len++;
        x[len-1] = x[len-2] + 10;
        y[len-1] = y[len-2];
        food_x = rand() % (WIDTH/10) * 10;
        food_y = rand() % (HEIGHT/10) * 10;
    }
}

void checkCollision(int x[], int y[], int len) {
    if (x[0] < 0 || x[0] >= WIDTH || y[0] < 0 || y[0] >= HEIGHT) {
        printf("Game Over!\n");
        exit(0);
    }
    for (int i = 1; i < len; i++) {
        if (x[0] == x[i] && y[0] == y[i]) {
            printf("Game Over!\n");
            exit(0);
        }
    }
}

void keyboard(unsigned char key, int x, int y) {
    switch(key) {
        case 'w':
            if (dir2 != 4) dir2 = 2;
            break;
        case 'a':
            if (dir2 != 1) dir2 = 3;
            break;
        case 's':
            if (dir2 != 2) dir2 = 4;
            break;
        case 'd':
            if (dir2 != 3) dir2 = 1;
            break;
        case 'i':
            if (dir1 != 4) dir1 = 2;
            break;
        case 'j':
            if (dir1 != 1) dir1 = 3;
            break;
        case 'k':
            if (dir1 != 2) dir1 = 4;
            break;
        case 'l':
            if (dir1 != 3) dir1 = 1;
            break;
    }
}

void timer(int value) {
    moveSnake(snake1_x, snake1_y, snake1_len, dir1);
    moveSnake(snake2_x, snake2_y, snake2_len, dir2);
    checkFood(snake1_x, snake1_y, snake1_len);
    checkFood(snake2_x, snake2_y, snake2_len);
    checkCollision(snake1_x, snake1_y, snake1_len);
    checkCollision(snake2_x, snake2_y, snake2_len);
    glutPostRedisplay();
    glutTimerFunc(100, timer, 0);
}

int main(int argc, char** argv) {
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
    glutInitWindowSize(WIDTH, HEIGHT);
    glutCreateWindow("Snake Game");
    glutDisplayFunc(display);
    glutKeyboardFunc(keyboard);
    glutTimerFunc(0, timer, 0);
    init();
    glutMainLoop();
    return 0;
}

这是一个比较简单的双人贪吃蛇游戏实现，使用了OpenGL来绘制游戏界面，基本的操作和规则与一般的贪吃蛇游戏相同。注意这个代码只是提供一个示例，实际的游戏可能需要更多的功能和细节处理。