用c语言写一段可以玩的贪吃蛇的代码

Sure, here is a simple C program for a playable Snake game:

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

#define HEIGHT 20
#define WIDTH 30

int map[HEIGHT][WIDTH];
int snake[HEIGHT*WIDTH][2];
int len, score;
int dire, over;
char key;
clock_t last;

void init(){
    int i, j;
    len = 3;
    score = 0;
    dire = 2;
    over = 0;
    for(i=0;i<HEIGHT;i++){
        for(j=0;j<WIDTH;j++){
            if(i==0 || i==HEIGHT-1 || j==0 || j==WIDTH-1)
                map[i][j] = -1;
            else 
                map[i][j] = 0;
        }
    }
    for(i=0;i<len;i++){
        snake[i][0] = HEIGHT/2;
        snake[i][1] = i+2;
        map[snake[i][0]][snake[i][1]] = 1;
    }
    snake[0][1]++;
    map[snake[0][0]][snake[0][1]] = 2;
    srand(time(NULL));
}

void print(){
    system("cls");
    int i, j;
    for(i=0;i<HEIGHT;i++){
        for(j=0;j<WIDTH;j++){
            switch(map[i][j]){
                case 0: printf(" "); break;
                case -1: printf("#"); break;
                case 1: printf("*"); break;
                case 2: printf("@"); break;
                case 3: printf("$"); break;
            }
        }
        printf("\n");
    }
    printf("Score: %d\n", score);
}

void update(){
    int i, j;
    for(i=len-1;i>0;i--){
        snake[i][0] = snake[i-1][0];
        snake[i][1] = snake[i-1][1];
    }
    switch(dire){
        case 0: snake[0][0]--; break;
        case 1: snake[0][1]++; break;
        case 2: snake[0][0]++; break;
        case 3: snake[0][1]--; break;
    }
    if(map[snake[0][0]][snake[0][1]]==1)
        over = 1;
    if(map[snake[0][0]][snake[0][1]]==-1)
        over = 1;
    if(map[snake[0][0]][snake[0][1]]==3){
        score++;
        len++;
        map[rand()%(HEIGHT-2)+1][rand()%(WIDTH-2)+1] = 3;
    }
    map[snake[0][0]][snake[0][1]] = 2;
    map[snake[len-1][0]][snake[len-1][1]] = 0;
}

void input(){
    char tmp;
    if(kbhit()){
        key = getch();
        if(key=='w' && dire!=2) dire = 0;
        if(key=='d' && dire!=3) dire = 1;
        if(key=='s' && dire!=0) dire = 2;
        if(key=='a' && dire!=1) dire = 3;
    }
}

int main(){
    init();
    while(!over){
        print();
        input();
        if(clock()-last>200){
            last = clock();
            update();
        }
    }
    printf("Game over! Your score is %d\n", score);
    return 0;
}

注意：此程序依赖于 <conio.h> 和 time.h 库，应在windows平台上编译和运行。