/************************贪吃蛇***********************/
/**********************2012-11-20*********************/#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <ctime>
#include <conio.h>
#include <cmath>
#include <windows.h>
using namespace std;/*** 光标定位 ***/
HANDLE hout=GetStdHandle(STD_OUTPUT_HANDLE);
COORD coord;void locate(int x,int y)
{coord.X=y;coord.Y=x;SetConsoleCursorPosition(hout,coord);
};/*** 隐藏光标 ***/
void hide()
{CONSOLE_CURSOR_INFO cursor_info={1,0};SetConsoleCursorInfo(hout, &cursor_info);
}/*** 生成随机数 ***/
double random(double start, double end)
{return start+(end-start)*rand()/(RAND_MAX + 1.0);
}/*** 定义地图的长宽，蛇的坐标，长度，方向，食物的位置 ***/
int m,n;struct node
{int x,y;
}snake[1000];int snake_length,dir;
node food;
int direct[4][2]={{-1,0},{1,0},{0,-1},{0,1}};/*** 输出墙 ***/
void print_wall()
{cout << " ";for (int i=1;i<=n;i++)cout << "-";cout << endl;for (int j=0;j<=m-1;j++){cout << "|";for (int i=1;i<=n;i++) cout << " ";cout << "|" << endl;}cout << " ";for (int i=1;i<=n;i++)cout << "-";
}/*** 首次输出蛇，其中snake[0]代表头 ***/
void print_snake()
{locate(snake[0].x,snake[0].y);cout << "@";for (int i=1;i<=snake_length-1;i++){locate(snake[i].x,snake[i].y);cout << "*";}
}/*** 判断是否撞墙或者自撞 ***/
bool is_correct()
{if (snake[0].x==0 || snake[0].y==0 || snake[0].x==m+1 || snake[0].y==n+1) return false;for (int i=1;i<=snake_length-1;i++){if (snake[0].x==snake[i].x && snake[0].y==snake[i].y) return false;}return true;
}/*** 随机生成并输出食物位置 ***/
bool print_food()
{srand((unsigned)time(0));bool e;while (1){e=true;int i=(int) random(0,m)+1,j=(int) random(0,n)+1;food.x=i;food.y=j;for (int k=0;k<=snake_length-1;k++){if (snake[k].x==food.x && snake[k].y==food.y){e=false;break;}}if (e) break;}locate(food.x,food.y);cout << "$";return true;
}/*** 蛇的前进 ***/
bool go_ahead()
{node temp;bool e=false;temp=snake[snake_length-1];for (int i=snake_length-1;i>=1;i--)snake[i]=snake[i-1];snake[0].x+=direct[dir][0];snake[0].y+=direct[dir][1];locate(snake[1].x,snake[1].y);cout << "*";/*** 吃到了食物 ***/if (snake[0].x==food.x && snake[0].y==food.y){snake_length++;e=true;snake[snake_length-1]=temp;}/*** 输出此时蛇状态 ***/if (!e){locate(temp.x,temp.y);cout << " ";}elseprint_food();locate(snake[0].x,snake[0].y);cout << "@";/*** 如果自撞 ***/if (!is_correct()){system("cls");cout << "You lose!" << endl << "Length: " << snake_length << endl;return false;}return true;
}/*** 主函数 ***/
int main()
{cout << "--------------------贪吃蛇---------------------" << endl;cout << "请先输入两个数,表示地图大小.要求长宽均不小于10." << endl;cout << "请注意窗口大小,以免发生错位.建议将窗口调为最大." << endl;cout << "再选择难度.请在1-10中输入1个数,1最简单,10则最难" << endl;cout << "然后进入游戏画面,以方向键控制方向.祝你游戏愉快!" << endl;cout << "-----------------------------------------------" << endl;cin >> m >> n;if (m<10 || n<10 || m>25 || n>40){cout << "ERROR" << endl;system("pause");return 0;}int hard;cin >> hard;if (hard<=0 || hard>100){cout << "ERROR" << endl;system("pause");return 0;}/*** 数据全部初始化，包括蛇长，位置，方向 ***/snake_length=5;clock_t a,b;char ch;double hard_len;for (int i=0;i<=4;i++){snake[i].x=1;snake[i].y=5-i;}dir=3;/*** 输出初始地图，蛇与食物 ***/system("cls");hide();print_wall();print_food();print_snake();locate(m+2,0);cout << "Now length: ";/*** 开始游戏 ***/while (1){/*** 难度随长度增加而提高 ***/hard_len=(double)snake_length/(double) (m*n);/*** 调节时间，单位是ms ***/a=clock();while (1){b=clock();if (b-a>=(int)(400-30*hard)*(1-sqrt(hard_len))) break;}/*** 接受键盘输入的上下左右，并以此改变方向 ***/if (kbhit()){ch=getch();if (ch==-32){ch=getch();switch(ch){case 72:if (dir==2 || dir==3)dir=0;break;case 80:if (dir==2 || dir==3)dir=1;break;case 75:if (dir==0 || dir==1)dir=2;break;case 77:if (dir==0 || dir==1)dir=3;break;}}}/*** 前进 ***/if (!go_ahead()) break;/*** 在最后输出此时长度 ***/locate(m+2,12);cout << snake_length;}system("pause");return 0;
}