#define N 200
#include <graphics.h>
#include <stdlib.h>
#include <dos.h>
#define LEFT 0x4b00
#define RIGHT 0x4d00
#define DOWN 0x5000
#define UP 0x4800
#define ESC 0x011b
int i,key;
int score = 0;/*得分*/
int gamespeed = 100000;/*遊戲速度自己調整*/
struct Food
{
int x;/*食物的橫坐標*/
int y;/*食物的縱坐標*/
int yes;/*判斷是否要出現食物的變量*/
}food;/*食物的結構體*/
struct Snake
{
int x[N];
int y[N];
int node;/*蛇的節數*/
int direction;/*蛇移動方向*/
int life;/* 蛇的生命,0活著,1死亡*/
}snake;
void Init(void);/*圖形驅動*/
void Close(void);/*圖形結束*/
void DrawK(void);/*開始畫面*/
void GameOver(void);/*結束遊戲*/
void GamePlay(void);/*玩遊戲具體過程*/
void PrScore(void);/*輸出成績*/
/*主函數*/
void main(void)
{
Init();/*圖形驅動*/
DrawK();/*開始畫面*/
GamePlay();/*玩遊戲具體過程*/
Close();/*圖形結束*/
}
/*圖形驅動*/
void Init(void)
{
int gd = DETECT, gm;
initgraph(&gd, &gm, "c:\\tc");
cleardevice();
}
/*開始畫面,左上角坐標為(50,40),右下角坐標為(610,460)的圍墻*/
void DrawK(void)
{
/*setbkcolor(LIGHTGREEN);*/
setcolor(11);
setlinestyle(SOLID_LINE, 0, THICK_WIDTH);/*設置線型*/
for(i = 50; i <= 600; i += 10)/*畫圍墻*/
{
rectangle(i, 40, i + 10, 49); /*上邊*/
rectangle(i, 451, i + 10, 460);/*下邊*/
}
for(i = 40; i <= 450; i += 10)
{
rectangle(50, i, 59, i + 10); /*左邊*/
rectangle(601, i, 610, i + 10);/*右邊*/
}
}
/*玩遊戲具體過程*/
void GamePlay(void)
{
randomize();/*隨機數發生器*/
food.yes = 1;/*1表示需要出現新食物,0表示已經存在食物*/
snake.life = 0;/*活著*/
snake.direction = 1;/*方向往右*/
snake.x[0] = 100; snake.y[0] = 100;/*蛇頭*/
snake.x[1] = 110; snake.y[1] = 100;
snake.node = 2;/*節數*/
PrScore();/*輸出得分*/
while(1)/*可以重復玩遊戲,壓ESC鍵結束*/
{
while(!kbhit())/*在沒有按鍵的情況下,蛇自己移動身體*/
{
if(food.yes == 1)/*需要出現新食物*/
{
food.x = rand() % 400 + 60;
food.y = rand() % 350 + 60;
while(food.x % 10 != 0)/*食物隨機出現後必須讓食物能夠在整格內,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--)/*蛇的每個環節往前移動,也就是貪吃蛇的關鍵算法*/
{
snake.x[i] = snake.x[i-1];
snake.y[i] = snake.y[i-1];
}
/*1,2,3,4表示右,左,上,下四個方向,通過這個判斷來移動蛇頭*/
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;
}
for(i = 3; i < snake.node; i++)/*從蛇的第四節開始判斷是否撞到自己了,因為蛇頭為兩節,第三節不可能拐過來*/
{
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();/*本次遊戲結束*/
snake.life=1; /*蛇死*/
}
if(snake.life == 1)/*以上兩種判斷以後,如果蛇死就跳出內循環,重新開始*/
break;
if(snake.x[0] == food.x && snake.y[0] == food.y)/*吃到食物以後*/
{
setcolor(0);/*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;
/*新的壹節先放在看不見的位置,下次循環就取前壹節的位置*/
snake.node++;/*蛇的身體長壹節*/
food.yes = 1;/*畫面上需要出現新的食物*/
score += 10;
PrScore();/*輸出新得分*/
}
setcolor(4);/*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);
delay(gamespeed);
setcolor(0);/*用黑色去除蛇的的最後壹節*/
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*/
break;
key = bioskey(0);/*接收按鍵*/
if(key == ESC)/*按ESC鍵退出*/
break;
else
if(key == UP&&snake.direction!=4)
/*判斷是否往相反的方向移動*/
snake.direction=3;
else
if(key == RIGHT &&snake.direction != 2)
snake.direction=1;
else
if(key == LEFT && snake.direction != 1)
snake.direction = 2;
else
if(key == DOWN && snake.direction != 3)
snake.direction = 4;
}/*endwhile(1)*/
}
/*遊戲結束*/
void GameOver(void)
{
cleardevice();
PrScore();
setcolor(RED);
settextstyle(0, 0, 4);
outtextxy(200, 200, "GAME OVER");
getch();
}
/*輸出成績*/
void PrScore(void)
{
char str[10];
setfillstyle(SOLID_FILL, YELLOW);
bar(50, 15, 220, 35);
setcolor(6);
settextstyle(0,0,2);
sprintf(str, "score:%d", score);
outtextxy(55, 20, str);
}
/*圖形結束*/
void Close(void)
{
getch();
closegraph();
}