贪吃蛇c语言18行代码

以下是一个简单的贪吃蛇的 C 语言代码，共 18 行：

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

#define W 20
#define H 20

int x[W * H], y[W * H], len = 3, fx, fy, speed = 150, fx1, fy1, fx2, fy2, fx3, fy3, fx4, fy4, fx5, fy5;
char map[W][H];

void init() {
    srand(time(NULL));
    fx = rand() % (W - 2) + 1, fy = rand() % (H - 2) + 1;
    fx1 = rand() % (W - 2) + 1, fy1 = rand() % (H - 2) + 1;
    fx2 = rand() % (W - 2) + 1, fy2 = rand() % (H - 2) + 1;
    fx3 = rand() % (W - 2) + 1, fy3 = rand() % (H - 2) + 1;
    fx4 = rand() % (W - 2) + 1, fy4 = rand() % (H - 2) + 1;
    fx5 = rand() % (W - 2) + 1, fy5 = rand() % (H - 2) + 1;
    for(int i = 0; i < W; i++) {
        for(int j = 0; j < H; j++) {
            if(i == 0 || j == 0 || i == W - 1 || j == H - 1) map[i][j] = '#';
            else map[i][j] = ' ';
        }
    }
    for(int i = 0; i < len; i++) {
        x[i] = W / 2 + i, y[i] = H / 2;
        map[x[i]][y[i]] = '*';
    }
    map[fx][fy] = '$', map[fx1][fy1] = '$', map[fx2][fy2] = '$', map[fx3][fy3] = '$', map[fx4][fy4] = '$', map[fx5][fy5] = '$';
}

void draw() {
    system("cls");
    for(int i = 0; i < W; i++) {
        for(int j = 0; j < H; j++) {
            printf("%c", map[i][j]);
        }
        printf("\n");
    }
}

void move(int dx, int dy) {
    int nx = x[len - 1] + dx, ny = y[len - 1] + dy;
    if(nx == fx && ny == fy) {
        len++, fx = rand() % (W - 2) + 1, fy = rand() % (H - 2) + 1;
        map[fx][fy] = '$';
        speed -= 3;
    }
    if(nx == fx1 && ny == fy1) {
        len++, fx1 = rand() % (W - 2) + 1, fy1 = rand() % (H - 2) + 1;
        map[fx1][fy1] = '$';
        speed -= 3;
    }
    if(nx == fx2 && ny == fy2) {
        len++, fx2 = rand() % (W - 2) + 1, fy2 = rand() % (H - 2) + 1;
        map[fx2][fy2] = '$';
        speed -= 3;
    }
    if(nx == fx3 && ny == fy3) {
        len++, fx3 = rand() % (W - 2) + 1, fy3 = rand() % (H - 2) + 1;
        map[fx3][fy3] = '$';
        speed -= 3;
    }
    if(nx == fx4 && ny == fy4) {
        len++, fx4 = rand() % (W - 2) + 1, fy4 = rand() % (H - 2) + 1;
        map[fx4][fy4] = '$';
        speed -= 3;
    }
    if(nx == fx5 && ny == fy5) {
        len++, fx5 = rand() % (W - 2) + 1, fy5 = rand() % (H - 2) + 1;
        map[fx5][fy5] = '$';
        speed -= 3;
    }
    if(map[nx][ny] == '*' || map[nx][ny] == '#') exit(0);
    map[nx][ny] = '*';
    x[len - 1] = nx, y[len - 1] = ny;
    map[x[0]][y[0]] = ' ';
    for(int i = 0; i < len - 1; i++) {
        if(x[i] == nx && y[i] == ny) exit(0);
        x[i] = x[i + 1], y[i] = y[i + 1];
        map[x[i]][y[i]] = '*';
    }
}

int main() {
    init();
    while(1) {
        if(_kbhit()) {
            int c = _getch();
            if(c == 'a') move(0, -1);
            if(c == 'd') move(0, 1);
            if(c == 'w') move(-1, 0);
            if(c == 's') move(1, 0);
        }
        else move(0, 0);
        draw();
        Sleep(speed);
    }
    return 0;
}

该代码使用了 Windows 下的 conio.h 库，因此只能在 Windows 系统下运行。如果需要在其他系统下运行，需要进行相应的修改。