#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#include <conio.h>
#include <time.h>
#define width 60
#define hight 25
#define SNAKESIZE 200 //蛇身的最长长度
int key = 72; //初始化蛇的运动方向，向上
int changeflag = 1; //用来标识是否生成食物，1表示蛇还没吃到食物，0表示吃到食物
int speed = 0; //时间延迟
struct {
int len;
//用来记录蛇身每个方块的坐标
int x[SNAKESIZE];
int y[SNAKESIZE];
int speed;
}snake;
struct
{
int x; int y;
}food;
void gotoxy(int x, int y)//调用Windows的API函数，可以在控制台的指定位置直接操作，这里可暂时不用深究
{
COORD coord;
coord.X = x;
coord.Y = y;
SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
}
//■○
void drawmap()
{
//打印图框
for (int _y = 0; _y < hight; _y++)
{
for (int x = 0; x < width; x += 2)
{
if (x == 0 || _y == 0 || _y == hight - 1 || x == width - 2)
{
gotoxy(x, _y);
printf("■");
}
}
}
//打印蛇头
snake.len = 3;
snake.x[0] = width / 2;
snake.y[0] = hight / 2;
gotoxy(snake.x[0], snake.y[0]);
printf("■");
//打印蛇身
for (int i = 1; i < snake.len; i++)
{
snake.x[i] = snake.x[i - 1];
snake.y[i] = snake.y[i - 1] + 1;
gotoxy(snake.x[i], snake.y[i]);
printf("■");
}
//初始化食物的位置
food.x = 20;
food.y = 20;
gotoxy(food.x, food.y);
printf("○");
}
/*
*控制台按键所代表的数字
*“↑”：72
*“↓”：80
*“←”：75
*“→”：77
*/
void snake_move() //按键处理函数
{
int history_key = key;
if (_kbhit())
{
fflush(stdin);
key = _getch();
key = _getch();
}
if (changeflag == 1)//还没吃到食物，把尾巴擦掉
{
gotoxy(snake.x[snake.len - 1], snake.y[snake.len - 1]);
printf(" ");
}
for (int i = snake.len - 1; i > 0; i--)
{
snake.x[i] = snake.x[i - 1];
snake.y[i] = snake.y[i - 1];
}
if (history_key == 72 && key == 80) key = 72;
if (history_key == 80 && key == 72) key = 80;
if (history_key == 75 && key == 77) key = 75;
if (history_key == 77 && key == 75) key = 77;
switch (key)
{
case 72:snake.y[0]--; break;
case 75:snake.x[0] -= 2; break;
case 77:snake.x[0] += 2; break;
case 80:snake.y[0]++; break;
}
gotoxy(snake.x[0], snake.y[0]);
printf("■");
gotoxy(0, 0);
changeflag = 1;
}
void creatfood()
{
if (snake.x[0] == food.x && snake.y[0] == food.y)//只有蛇吃到食物，才能生成新食物
{
changeflag = 0;
snake.len++;
if (speed <= 100)speed += 10;
while (1)
{
srand((unsigned int)time(NULL));
food.x = rand() % (width - 6) + 2;//限定食物的x范围不超出围墙，但不能保证food.x为偶数
food.y = rand() % (hight - 2) + 1;
for (int i = 0; i < snake.len; i++)
{
if (food.x == snake.x[i] && food.y == snake.y[i])//如果产生的食物与蛇身重合则退出
break;
}
if (food.x % 2 == 0) break;//符合要求，退出循环
}
gotoxy(food.x, food.y); printf("○");
}
}
bool Gameover()
{
//碰到围墙，OVER
if (snake.x[0] == 0 || snake.x[0] == width - 2)return false;
if (snake.y[0] == 0 || snake.y[0] == hight - 1) return false;
//蛇身达到最长，被迫OVER
if (snake.len == SNAKESIZE) return false;
//头碰到蛇身，OVER
for (int i = 1; i < snake.len; i++)
{
if (snake.x[0] == snake.x[i] && snake.y[0] == snake.y[i])
return false;
}
return true;
}
int main()
{
system("mode con cols=60 lines=27");
printf("请输入难度：\n1.新手\n2.入门\n3.简单\n4.中等\n5.困难\n6.噩梦\n7.地狱\n8.炼狱\n");
int a;
while(1)
{
scanf("%d",&a);
if(a==1){a=200;break;}
else if(a==2){a=150;break;}
else if(a==3){a=130;break;}
else if(a==4){a=100;break;}
else if(a==5){a=80;break;}
else if(a==6){a=50;break;}
else if(a==7){a=30;break;}
else if(a==8){a=10;break;}
else{system("cls");printf("输入错误！请重输！");}
}
system("cls");
for(int i=3;i>0;i--){
printf("%d",i);
Sleep(1000);
system("cls");
}
drawmap();
while (Gameover())
{
snake_move();
creatfood();
Sleep(a);//蛇的移动速度
}
return 0;
}