【标题】：贪吃蛇游戏--结构化编程
【关键字】：--
【来源】：http://blog.csdn.net/ningboweimin/archive/2006/11/08/1372870.aspx

贪吃蛇游戏--结构化编程

贪吃蛇游戏--结构化编程

/*c语言编程--重要的的是结构化的编程思想*/

#include<stdio.h>
#include<math.h>
#include<graphics.h>
#include<bios.h>
#include<time.h>
#include<stdlib.h>

#define FIELD_WIDTH   300 /*就做20个格子的*/
#define FIELD_HEIGHT   300
#define FIELD_LEFT   getmaxx()/2-FIELD_WIDTH/2
#define FIELD_TOP   getmaxy()/2-FIELD_HEIGHT/2

#define CELL_NUMBER 15
#define CELL_WIDTH FIELD_HEIGHT/CELL_NUMBER

#define TAIJI_CX getmaxx()/2
#define TAIJI_CY 50
#define TAIJI_R 24
#define TAIJI_r 7

struct Rect
{ int left;
int top;
int right;
int bottom;
}field;
struct BeanStruct
{ int h;
int l;
}bean;
struct SnakeStruct
{ int h;
int l;
int direction;
int length;
}snake[100];
/*int direction;这是一个错误*/

main()
{
int driver=DETECT,mode=0,errorcode;
int i,key;
void Welcome();
void GameInit();
void SnakeTurn(int direction);
void SnakeMove();
void EatBean();
void Isdead();
initgraph(&driver,&mode,"c:\\turboc2");
Welcome();
GameInit();
while(1)
{ if(kbhit())
  { key=SpecialKey();
   if(key==72) SnakeTurn(1);/*1：上，2：下，3：左，4：右*/
   if(key==80) SnakeTurn(2);
   if(key==75) SnakeTurn(3);
   if(key==77) SnakeTurn(4);
  }
  else
  {
   SnakeMove();
   EatBean();
   Isdead();
   for(i=0;i<=15;i++)
    delay(80000);

  }
}
}
/**************************************1层函数*********************************************/
void Welcome()
{  setfillstyle(SOLID_FILL,YELLOW);
  bar(0,0,getmaxx(),getmaxy());
  setfillstyle(SOLID_FILL,WHITE);
  bar(80,80,getmaxx()-80,getmaxy()-80);
  setfillstyle(SOLID_FILL,GREEN);
  bar(100,100,getmaxx()-100,getmaxy()-100);

  setcolor(BLACK);
  settextstyle(1, 0, 3);   /*三重笔划字体, 水平放大8倍*/
  outtextxy(140, 140, "GAME:    SNAKE ");
  outtextxy(140, 180, "MAKER:   HOU ");
  settextstyle(1, 0, 6);   /*三重笔划字体, 水平放大8倍*/
  outtextxy(140, 220, "WELCOM");
  setcolor(BLUE);
  rectangle(0,0,getmaxx(),getmaxy());
  rectangle(5,5,getmaxx()-5,getmaxy()-5);
  getch();
  cleardevice();
}

void GameInit()
{ void FieldInit();
void BeanInit();
void SnakeInit();

FieldInit();
SnakeInit();
BeanInit();
getch();
}
void SnakeTurn(int direction)/*1.看能不能变方向。2。变方向*/
{ if((direction==1)&&(snake[0].direction!=2)) snake[0].direction=1;
if((direction==2)&&(snake[0].direction!=1)) snake[0].direction=2;
if((direction==3)&&(snake[0].direction!=4)) snake[0].direction=3;
if((direction==4)&&(snake[0].direction!=3)) snake[0].direction=4;

}
void SnakeMove()
/*0.擦尾，1。移动身子；2。移动头。3，画头 */
/*另一种思维是全擦全画 */
/*问是先移头还是先移身子 */
/*移动身子的时候怎么移动？ */
{ int i;
setfillstyle(SOLID_FILL,BROWN);
bar(FIELD_LEFT+snake[snake[0].length-1].l*CELL_WIDTH+1,FIELD_TOP+snake[snake[0].length-1].h*CELL_WIDTH+1,FIELD_LEFT+(snake[snake[0].length-1].l+1)*CELL_WIDTH-1,FIELD_TOP+(snake[snake[0].length-1].h+1)*CELL_WIDTH-1);

for(i=snake[0].length;i>=1;i--)
{ snake[i].h=snake[i-1].h;
snake[i].l=snake[i-1].l;
}

if(snake[0].direction==1) snake[0].h=snake[0].h-1;
if(snake[0].direction==2) snake[0].h=snake[0].h+1;
if(snake[0].direction==3) snake[0].l=snake[0].l-1;
if(snake[0].direction==4) snake[0].l=snake[0].l+1;

setfillstyle(SOLID_FILL,GREEN);
bar(FIELD_LEFT+snake[0].l*CELL_WIDTH+1,FIELD_TOP+snake[0].h*CELL_WIDTH+1,FIELD_LEFT+(snake[0].l+1)*CELL_WIDTH-1,FIELD_TOP+(snake[0].h+1)*CELL_WIDTH-1);

}
void EatBean()/*1.判断撞上了吗？2。长度加一，3。位置赋上什么？！*/
{ void BeanInit();

if((snake[0].h==bean.h)&&(snake[0].l==bean.l))
{
  BeanInit();
/*  snake[snake[0].length].h=bean.h;
  snake[snake[0].length].l=bean.l;*//*这样是错误的现象*/
  snake[snake[0].length].h=snake[snake[0].length-1].h;
  snake[snake[0].length].l=snake[snake[0].length-1].l;
  snake[0].length=snake[0].length+1;
}

}
void Isdead()/*几种情况下死？*/
{ int i,isDead=0;
for(i=1;i<snake[0].length;i++)
{ if((snake[i].h==snake[0].h)&&(snake[i].l==snake[0].l))
   isDead=1;
}
if((snake[0].h<0)||(snake[0].h>=CELL_NUMBER)||(snake[0].l<0)||(snake[0].l>=CELL_NUMBER))
   isDead=1;
if(isDead==1)
{ setcolor(10);
  settextstyle(1, 0, 3);   /*三重笔划字体, 水平放大8倍*/
  outtextxy(20, 120, "YOU LOST");
  getch();
  closegraph();
  exit(1);
}
}
/**************************************二层函数*********************************************/
void FieldInit()
{ void PainTaiJi();
/*数值初始化*/
int i;
field.left=getmaxx()/2- FIELD_WIDTH /2;
field.right=getmaxx()/2+ FIELD_WIDTH /2;
field.top=getmaxy()/2-FIELD_HEIGHT/2;
field.bottom=getmaxy()/2+FIELD_HEIGHT/2;
setcolor(BLUE);
rectangle(0,0,getmaxx(),getmaxy());
rectangle(2,2,getmaxx()-2,getmaxy()-2);
/*画一个场背景*/
setfillstyle(SOLID_FILL,BROWN);
bar(field.left,field.top,field.right,field.bottom);
/*画一个场地外边*/
setcolor(BLUE);
rectangle(field.left,field.top,field.right,field.bottom);
rectangle(field.left-5,field.top-5,field.right+5,field.bottom+5);
setfillstyle(SOLID_FILL, LIGHTGRAY);
floodfill(field.left-1,field.top-1,BLUE);
/*画一个场地格子*/
setlinestyle(0,0,2);
/*画横条*/
for(i=0;i<=CELL_NUMBER;i++)
{ line(field.left,field.top+i*CELL_WIDTH,field.right,field.top+i*CELL_WIDTH);
}
/*画树条*/
for(i=0;i<=CELL_NUMBER;i++)
{ line(field.left+i*CELL_WIDTH,field.top,field.left+i*CELL_WIDTH,field.bottom);
}
setcolor(WHITE);
settextstyle(1, 0, 5);   /*三重笔划字体, 水平放大8倍*/
outtextxy(getmaxx()/2-FIELD_WIDTH/2+10, getmaxy()-80, "MAKER : HOU");
PainTaiJi();

}
void SnakeInit()
{ int i;
snake[0].h=5;
snake[0].l=5;
snake[0].direction=1;
snake[0].length=3;
snake[1].h=5;
snake[1].l=6;
snake[2].h=5;
snake[2].l=7;

setcolor(CYAN);
setfillstyle(SOLID_FILL, GREEN);
for(i=0;i<=1;i++)
  bar(FIELD_LEFT+snake[i].l*CELL_WIDTH+1,FIELD_TOP+snake[i].h*CELL_WIDTH+1,FIELD_LEFT+(snake[i].l+1)*CELL_WIDTH-1,FIELD_TOP+(snake[i].h+1)*CELL_WIDTH-1);
}
void BeanInit()
/*讨论：是否应该有豆动这个函数？？？？？*//*生成成功？有没有和蛇重叠*/
/*或者说是豆的生成，如果被蛇吃了的话，可以在生成就行了，一样的函数*/
{ int i,ss=1,sum=0;
static cnum=0;
if(cnum!=0)
{ setfillstyle(SOLID_FILL,BROWN);
  floodfill(FIELD_LEFT+bean.l*CELL_WIDTH+CELL_WIDTH/2,FIELD_TOP+bean.h*CELL_WIDTH+CELL_WIDTH/2,BLUE);
}
while(ss==1)
{
  randomize();
  bean.h=random(CELL_NUMBER);
  bean.l=random(CELL_NUMBER);
  for(i=0;i<snake[0].length;i++)
  { if(!((snake[i].h==bean.h)&&(snake[i].l==bean.l)) )
    sum=sum+1;
  }
  if(sum==snake[0].length) ss=0;
  sum=0;
}
setcolor(CYAN);
setfillstyle(SOLID_FILL,GREEN);
circle(FIELD_LEFT+bean.l*CELL_WIDTH+CELL_WIDTH/2,FIELD_TOP+bean.h*CELL_WIDTH+CELL_WIDTH/2,CELL_WIDTH/2-1);
floodfill(FIELD_LEFT+bean.l*CELL_WIDTH+CELL_WIDTH/2,FIELD_TOP+bean.h*CELL_WIDTH+CELL_WIDTH/2,CYAN);
}
/**************************************三层函数*********************************************/
void PainTaiJi()
{ /*画外面的圆*/
setcolor(LIGHTGRAY);
circle(TAIJI_CX,TAIJI_CY,TAIJI_R);
arc(TAIJI_CX,TAIJI_CY-TAIJI_R/2,90,270,TAIJI_R/2);
arc(TAIJI_CX,TAIJI_CY+TAIJI_R/2,270,90,TAIJI_R/2);
/*画二个圆弧*/
setfillstyle(SOLID_FILL,WHITE);
floodfill(TAIJI_CX,TAIJI_CY-1, LIGHTGRAY);
setfillstyle(SOLID_FILL,BLACK);
floodfill(TAIJI_CX,TAIJI_CY+1, LIGHTGRAY);
/*画下面的小圈*/
setcolor(LIGHTGRAY);
circle(TAIJI_CX,TAIJI_CY+TAIJI_R/2,TAIJI_r);
setfillstyle(SOLID_FILL,WHITE);
floodfill(TAIJI_CX,TAIJI_CY+TAIJI_R/2,LIGHTGRAY);
/*画上面的小圈*/
setcolor(LIGHTGRAY);
circle(TAIJI_CX,TAIJI_CY-TAIJI_R/2,TAIJI_r);
setfillstyle(SOLID_FILL,BLACK);
floodfill(TAIJI_CX,TAIJI_CY-TAIJI_R/2,LIGHTGRAY);
}
/* ===============================公共函数====================================== */
int SpecialKey()
{ int key;
   while(bioskey(1)==0);
   key=bioskey(0);