用c语言编写一个贪吃蛇游戏

好的，编写贪吃蛇游戏可以使用C语言和图形库（如graphics.h）来实现。以下是基本的代码框架：

#include <graphics.h>
#include <conio.h>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>

#define WIDTH 640
#define HEIGHT 480
#define BLOCK_SIZE 10
#define MAX_LENGTH 100

int x[MAX_LENGTH], y[MAX_LENGTH], length = 3;
int food_x, food_y;
int direction = 1; //0-up, 1-right, 2-down, 3-left

void init_game();
void draw_snake();
void move_snake();
void generate_food();
int check_collision(int x, int y);

int main() {
    init_game();
    while (1) {
        move_snake();
        delay(100);
    }
    return 0;
}

void init_game() {
    int gdriver = DETECT, gmode;
    initgraph(&gdriver, &gmode, "");
    setbkcolor(WHITE);
    setcolor(BLACK);
    setfillstyle(SOLID_FILL, BLACK);
    rectangle(0, 0, WIDTH, HEIGHT);
    floodfill(1, 1, BLACK);
    x[0] = WIDTH / 2;
    y[0] = HEIGHT / 2;
    x[1] = x[0] - BLOCK_SIZE;
    y[1] = y[0];
    x[2] = x[0] - 2 * BLOCK_SIZE;
    y[2] = y[0];
    draw_snake();
    generate_food();
}

void draw_snake() {
    int i;
    for (i = 0; i < length; i++) {
        bar(x[i], y[i], x[i] + BLOCK_SIZE, y[i] + BLOCK_SIZE);
    }
}

void move_snake() {
    int i;
    for (i = length - 1; i > 0; i--) {
        x[i] = x[i - 1];
        y[i] = y[i - 1];
    }
    switch (direction) {
    case 0:
        y[0] -= BLOCK_SIZE;
        break;
    case 1:
        x[0] += BLOCK_SIZE;
        break;
    case 2:
        y[0] += BLOCK_SIZE;
        break;
    case 3:
        x[0] -= BLOCK_SIZE;
        break;
    }
    if (check_collision(x[0], y[0])) {
        closegraph();
        exit(0);
    }
    if (x[0] == food_x && y[0] == food_y) {
        length++;
        generate_food();
    }
    cleardevice();
    draw_snake();
    setfillstyle(SOLID_FILL, RED);
    bar(food_x, food_y, food_x + BLOCK_SIZE, food_y + BLOCK_SIZE);
}

void generate_food() {
    srand(time(NULL));
    food_x = (rand() % (WIDTH / BLOCK_SIZE)) * BLOCK_SIZE;
    food_y = (rand() % (HEIGHT / BLOCK_SIZE)) * BLOCK_SIZE;
}

int check_collision(int x, int y) {
    if (x < 0 || x >= WIDTH || y < 0 || y >= HEIGHT) {
        return 1;
    }
    int i;
    for (i = 1; i < length; i++) {
        if (x == x[i] && y == y[i]) {
            return 1;
        }
    }
    return 0;
}

这个代码框架实现了基本的贪吃蛇游戏逻辑，包括蛇的移动、食物的生成、碰撞检测等。你可以根据自己的需要来修改代码来完善游戏的功能和界面。