snake算法贪吃蛇C语言设计步骤

贪吃蛇C语言设计步骤

#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=50000;/*游戏速度可以自己调整*/ struct Food { int x; /*食物的横坐标*/ int y; /*食物的纵坐标*/ int yes; /*判断是否要出现食物*/ }food; /*食物结构体*/ struct Snake { int x[N]; int y[N]; int node; /*贪吃蛇的节数*/ int direction;/*蛇的移动方向*/ int life; }snake; void Init (void);/*图形驱动*/ void Close(void); void Drawk(void); void GameOver(void); void GamePlay(void); void PrScore(void);/*输出成绩*/ /*主函数*/ void main(void) { Init(); Drawk(); GamePlay(); Close(); } void Init(void) { int gd=DETECT,gm; initgraph(&gd,&gm,"c:\tc"); cleardevice(); } void Drawk(void) { /*setbkcolor(LIGHTGREEN;*/ setcolor(11); setlinestyle(SOLID_LINE,0,THICK_WIDTH); for(i=50;i<=600;i+=10) { rectangle(i,40,i+10,49); rectangle(i,451,i+10,460); } for(i=40;i<=450;i+=10) { rectangle(50,i,59,i+10); rectangle(601,i,610,i+10); } } void GamePlay(void) { randomize(); food.yes=1; snake.life=0; snake.direction=1; snake.x[0]=100;snake.y[0]=100; snake.x[1]=110;snake.y[1]=100; snake.node=2; PrScore(); while(1) { while(!kbhit()) { if(food.yes==1) { food.x=rand()%400+60; food.y=rand()%350+60; while(food.x%10!=0) food.x++; while(food.y%10!=0) food.y++; food.yes=0; } if(food.yes==0) { setcolor(GREEN); rectangle(food.x,food.y,food.x+10,food.y-10); } for(i=snake.node-1;i>0;i--) /*蛇的每个环节往前移动，也就是贪吃蛇的关键算法*/ { snake.x[i]=snake.x[i-1]; snake.y[i]=snake.y[i-1]; } /*1，2，3，4表示右，左，上，下四个方向，通过这个判断来移动蛇头*/ 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++) { if(snake.x[i]==snake.x[0]&&snake.y[i]==snake.y[0]) { GameOver(); snake.life=1; break; } } if (snake.x[0]<55||snake.x[0]>595||snake.y[0]<55|| snake.y[0]>455) { GameOver(); snake.life=1; } if(snake.life==1) break; if(snake.x[0]==food.x&&snake.y[0]==food.y) { setcolor(0); rectangle(food.x,food.y,food.x+10,food.y-10); snake.x[snake.node]=-20; snake.y[snake.node]=-20; snake.node++; food.yes=1; score+=10; PrScore(); } setcolor(4); 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); rectangle(snake.x[snake.node-1],snake.y[snake.node-1], snake.x[snake.node-1]+10,snake.y[snake.node-1]-10); } if(snake.life==1) break; key=bioskey(0); if(key==Esc)/*按Esc键退出*/ break; else if(key==UP&&snake.direction!=4) 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; } } /*游戏结束*/ void GameOver(void) { cleardevice(); PrScore(); setcolor(RED); settextstyle(0,0,4); outtextxy(200,200,"GAME OVER"); getch(); } /*输出成绩*/ 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); } void Close(void) { getch(); closegraph(); }