编译环境：windows 7 64位

编译工具：codeblocks 13.12

备注：未使用graphics.h 

数据结构：双向链表

1.程序未使用graphis.h中的 函数，所以采用先清屏，再打印的方式显示图形，大约每秒刷新一次；

2.除蛇头元素外，其它元素的状态（行进方向）均重复前一元素；

3.蛇的图形元素为笑脸，可在源码中更改symbol参数选用不同元素。 

游戏截图1    

游戏截图2

/*********************************
*time: 2016.09.17 22:50
*version:1.0
*********************************/
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#include <conio.h>

#define UP 0
#define DOWN 1
#define LEFT 2
#define RIGHT 3

#define HIGH 35
#define WIDTH 80 //必须为偶数

int temp[HIGH][WIDTH];//像素数组，用于打印图形（蛇、食物、空格）

int STATE = LEFT;//初始状态为向左走

int FOODPOS = 700; //WIDTH*HIGH/2+WIDTH/2-WIDTH*HIGH/4;//食物的初始位置

#define INIT_LEN 1 //初始蛇的长度
int init_pos[INIT_LEN] = {HIGH/2*WIDTH+WIDTH/2};//蛇的初始位置
int SCORE = 0;//得分

//蛇的结构体
struct Item{
int pos;//位置
int state;//状态：上下左右
struct Item *per, *next;
};

struct Item *head, *tail, *iTemp;

char symbol = 2;//元素符号

//获取元素的位置
int getPos(int pos, int state){
if(state == UP)
pos -= WIDTH;
else if(state == DOWN)
pos += WIDTH;
else if(state == LEFT)
pos -= 2;
else if(state == RIGHT)
pos += 2;
else
{
printf("\n状态state出错！");
exit(-1);
}
return pos;
}

//更新蛇的位置与状态
void change(){
while(1){
print();
iTemp = tail;
while(iTemp != head){
iTemp->state = iTemp->per->state;//当前元素的状态等于其前驱的状态
iTemp->pos = getPos(iTemp->pos,iTemp->state);//更新位置信息
iTemp = iTemp->per;
}
head->state = STATE;
head->pos = getPos(head->pos, head->state);
}
}

//打印图形
void print(){
int h, w;
for(h = 1; h < HIGH-1; h++)//初始化像素数组
for(w = 1; w < WIDTH-1; w++)
temp[h][w] = 0;
for(w = 0; w < WIDTH; w += 2){//置第0行和最后一行为2
temp[0][w] = 2;
temp[HIGH-1][w] = 2;
}
for(h = 0; h < HIGH; h++){//置第0列和最后一列为2
temp[h][0] = 2;
temp[h][WIDTH-1] = 2;
}

iTemp = head->next;
while(iTemp){
h = iTemp->pos / WIDTH;
w = iTemp->pos % WIDTH;
temp[h][w] = 1;
iTemp = iTemp->next;
}

h = head->pos / WIDTH;
w = head->pos % WIDTH;
int i;
if(temp[h][w] == 2 || temp[h][w] == 1){//撞到墙或自己，游戏结束head->pos < 0 || head->pos > HIGH*WIDTH
for(i = 0; i < (WIDTH-12)/2; i++)
printf(" ");
printf("游戏结束:%d分", SCORE);
getchar();
exit(0);
}
else
temp[h][w] = 1;

temp[FOODPOS/WIDTH][FOODPOS%WIDTH] = 1;
if(head->pos == FOODPOS){
//吃食物
struct Item *new = (struct Item*)malloc(sizeof(struct Item));
new->next = head;
head->per = new;
//head = new;
new->per = NULL;
new->pos = getPos(head->pos, head->state);
new->state = head->state;
head = new;
SCORE += 10;

//产生新食物
while(temp[FOODPOS/WIDTH][FOODPOS%WIDTH] == 1 || temp[FOODPOS/WIDTH][FOODPOS%WIDTH] == 2 || FOODPOS % 2 ==1){
FOODPOS = rand() % (HIGH * WIDTH);
}
temp[FOODPOS/WIDTH][FOODPOS%WIDTH] = 1;
}

//清屏并打印图形
system("cls");
for(h = 0; h < HIGH; h++)
for(w = 0; w < WIDTH; w++){
if(temp[h][w] == 0)
printf(" ");
else if(temp[h][w] == 1)
printf("%c", symbol);
else if(temp[h][w] == 2)
printf("*");
else{
printf("\t\t\t\t\t error!");
exit(-2);
}
}
}

//初始化结构体
void init(){
int i;

head = (struct Item*)malloc(sizeof(struct Item));
head->per = NULL;
iTemp = head;
iTemp->pos = init_pos[0];
iTemp->state = LEFT;

for(i = 1; i < INIT_LEN; i++){
iTemp->next = (struct Item*)malloc(sizeof(struct Item));
iTemp->next->per = iTemp;
iTemp = iTemp->next;
iTemp->pos = init_pos[i];
iTemp->state = LEFT;
}

iTemp->next = NULL;
tail = iTemp;
}

DWORD WINAPI Thread1(LPVOID pM){
while(1){
change();
}
return 0;
}

DWORD WINAPI Thread2(LPVOID pM){
char c;
while(1){
c = _getch();//控制蛇的行进方向
if(c == 'a' && STATE != RIGHT)
STATE = LEFT;
else if(c == 'd' && STATE != LEFT)
STATE = RIGHT;
else if(c == 'w' && STATE != DOWN)
STATE = UP;
else if(c == 's' && STATE != UP)
STATE = DOWN;
else
continue;
}
return 0;
}

int main(void) {
system("mode con cols=80 lines=40");//设置窗口大小
system("color 8f");//设置窗口颜色
init();

HANDLE handle1 = CreateThread(NULL, 0, Thread1, NULL, 0, NULL);//线程1
HANDLE handle2 = CreateThread(NULL, 0, Thread2, NULL, 0, NULL);//线程2

WaitForSingleObject(handle1, INFINITE);
WaitForSingleObject(handle2, INFINITE);
return 0;
}