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#include <graphics.h>
#include <stdlib.h>
#include <conio.h>
#include <time.h>
#include <stdio.h>
#include "snake.h"
int score = 0;
int gamespeed = 100; //蛇運(yùn)行速度
static void Init(void); /*圖形驅(qū)動(dòng)*/
static void Close(void); /*圖形結(jié)束*/
static void Game_interface(void); /*游戲界面*/
static void GameOver(void); /*結(jié)束游戲*/
static void GamePlay(void); /*游戲過(guò)程*/
static void PrScore(void); /*輸出成績(jī)*/
/*主函數(shù)*/
int main(void)
{
Init();
Game_interface();
GamePlay();
Close();
return 0;
}
/*圖形驅(qū)動(dòng)*/
static void Init(void)
{
int gd=9,gm=2;
initgraph(&gd,&gm," ");
cleardevice();
}
/* 開始畫面，左上角坐標(biāo)為（50，40），右下角坐標(biāo)為（610，460）的圍墻 */
static void Game_interface(void)
{
int i;
setcolor(LIGHTCYAN); /*setbkcolor(LIGHTGREEN);*/
setlinestyle(PS_SOLID,0,1); /*設(shè)置線型*/
for(i=50;i<=600;i+=10) /*畫邊框*/
{
rectangle(i,40,i+10,49); /*上邊框*/
rectangle(i,451,i+10,460); /*下邊框*/
}
for(i=40;i<=450;i+=10)
{
rectangle(50,i,59,i+10); /*左邊框*/
rectangle(601,i,610,i+10); /*右邊框*/
}
}
/* 游戲主函數(shù) */
static void GamePlay(void)
{
int i;
srand(time(NULL)); /*隨機(jī)數(shù)發(fā)生器*/
food.yes = 1; /*1表示需要出現(xiàn)新食物,0表示已經(jīng)存在食物*/
snake.life = 0; /*活著*/
snake.direction = 1; /*方向往右*/
snake.x[0] = 100;
snake.y[0] = 100;
snake.x[1] = 110;
snake.y[1] = 100;
snake.node = 2; /*節(jié)數(shù)*/
PrScore(); /*輸出得分*/
while(1) /*可以重復(fù)玩游戲,壓ESC鍵結(jié)束*/
{
while( !kbhit() ) /*在沒有按鍵的情況下,蛇自己移動(dòng)*/
{
if(food.yes == 1) /*需要出現(xiàn)新食物*/
{
food.x = rand()%400 + 60;
food.y = rand()%350 + 60;
while(food.x%10 != 0) /*食物隨機(jī)出現(xiàn)后必須讓食物能夠在整格內(nèi),這樣才可以讓蛇吃到*/
food.x++;
while(food.y%10 != 0)
food.y++;
food.yes = 0; /*畫面上有食物了*/
}
if(food.yes == 0) /*畫面上有食物了就要顯示*/
{
setcolor(GREEN);
rectangle(food.x,food.y,food.x + 10,food.y - 10);
}
for(i=snake.node-1;i>0;i--) /*蛇的每個(gè)環(huán)節(jié)往前移動(dòng),也就是貪吃蛇的關(guān)鍵算法*/
{
snake.x[i] = snake.x[i-1];
snake.y[i] = snake.y[i-1];
}
/*1,2,3,4表示右,左,上,下四個(gè)方向,通過(guò)這個(gè)判斷來(lái)移動(dòng)蛇頭*/
switch(snake.direction)
{
case 1:
snake.x[0] += 10;
break;
case 2:
snake.x[0] -= 10;
break;
case 3:
snake.y[0] -= 10;
break;
case 4:
snake.y[0] += 10;
break;
}
/* 從蛇的第四節(jié)開始判斷是否撞到自己 */
for(i=3;i<snake.node;i++)
{
if((snake.x[i] == snake.x[0]) && (snake.y[i] == snake.y[0]))
{
GameOver(); /*顯示失敗*/
snake.life = 1;
break;
}
}
if((snake.x[0] < 55) || (snake.x[0] > 595) || (snake.y[0] < 55) || (snake.y[0] > 455)) /*蛇是否撞到墻壁*/
{
GameOver(); /*本次游戲結(jié)束*/
snake.life = 1; /*蛇死*/
}
if(snake.life == 1) /*以上兩種判斷以后,如果蛇死就跳出內(nèi)循環(huán)，重新開始*/
break;
if((snake.x[0] == food.x) && (snake.y[0] == food.y)) /*吃到食物以后*/
{
setcolor(BLACK); /*把畫面上的食物東西去掉*/
rectangle(food.x,food.y,food.x+10,food.y-10);
snake.x[snake.node] = -20;
snake.y[snake.node] = -20;
/* 新的一節(jié)先放在看不見的位置,下次循環(huán)就取前一節(jié)的位置 */
snake.node++; /*蛇的身體長(zhǎng)一節(jié)*/
food.yes = 1; /*畫面上需要出現(xiàn)新的食物*/
score += 10;
PrScore(); /*輸出新得分*/
}
setcolor(RED); /*畫出蛇*/
for(i=0;i<snake.node;i++)
rectangle(snake.x[i],snake.y[i],snake.x[i]+10,snake.y[i]-10);
Sleep(gamespeed);
setcolor(BLACK); /*用黑色去除蛇的的最后一節(jié)*/
rectangle(snake.x[snake.node-1],snake.y[snake.node-1],
snake.x[snake.node-1]+10,snake.y[snake.node-1]-10);
} /*endwhile（!kbhit）*/
if(snake.life == 1) /*如果蛇死就跳出循環(huán)*/
break;
key=getch(); /*接收按鍵*/
if (key == ESC) break; /*按ESC鍵退出*/
switch(key)
{
case UP:
if(snake.direction != 4) /*判斷是否往相反的方向移動(dòng)*/
snake.direction = 3;
break;
case RIGHT:
if(snake.direction != 2)
snake.direction = 1;
break;
case LEFT:
if(snake.direction != 1)
snake.direction = 2;
break;
case DOWN:
if(snake.direction != 3)
snake.direction = 4;
break;
}
}/*endwhile(1)*/
}
/*游戲結(jié)束*/
static void GameOver(void)
{
cleardevice();
PrScore();
setcolor(RED);
setfont(56,0,"黑體");
outtextxy(200,200,"GAME OVER");
getch();
}
/*輸出成績(jī)*/
static void PrScore(void)
{
char str[10];
setfillstyle(YELLOW);
bar(50,15,220,35);
setcolor(BROWN);
setfont(16,0,"宋體");
sprintf(str,"score:%d",score);
outtextxy(55,16,str);
}
static void Close(void)
{
closegraph();
}
#ifndef SNAKE_H
#define SNAKE_H
#define LEFT 'a'
#define RIGHT 'd'
#define DOWN 's'
#define UP 'w'
#define ESC 27
#define N 200 /*蛇的最大長(zhǎng)度*/
char key; /*控制按鍵*/
struct Food
{
int x; /*食物的橫坐標(biāo)*/
int y; /*食物的縱坐標(biāo)*/
int yes; /*判斷是否要出現(xiàn)食物的變量*/
}food; /*食物的結(jié)構(gòu)體*/
struct Snake
{
int x[N];
int y[N];
int node; /*蛇的節(jié)數(shù)*/
int direction; /*蛇移動(dòng)方向*/
int life; /* 蛇的生命,0活著,1死亡*/
}snake;
#endif