#include<time.h>

#include<stdlib.h>

#include<graphics.h>

#include<conio.h>

#include<dos.h>

#include<math.h>

#define R 10

#define ESC 0x011b

#define LOW 0x5000

#define FAST 0x4800

int draw_car(int x,int y,char *ch);

double dalta=20,angle;

void *image;

int step=20;

main()

{

int gdriver=DETECT,gmode;

static int startx=60;

static int starty=20;

int maxy,maxx,l=1,n=1;

char ch,play, str[2];

int size,temch;

int ok,y=50;

clrscr();

printf("\n\n\n\n\n*****************************************\n");

printf(" 1.play only number 0-9 .\n");

printf(" 2.play only char a-z .\n");

printf(" 3.exit\n");

printf("*****************************************\n");

while(1){

printf("\nPls enter choice:");

play=getche();

if((play=="1")||(play=="2"))

break;

if(play=="3")

return;

}

registerbgidriver( EGAVGA_driver ); /*註冊vga驅動*/

initgraph(&gdriver,&gmode,"d:\\tc3\\bgi"); /*初始化圖形介面*/

cleardevice(); /*清除螢幕*/

setbkcolor(BLUE); /*將背景色設定成藍色*/

size=imagesize(startx,starty,startx+60,starty+60); /*計算生成60×60個象素的圖需要的位元組數*/

image=(unsigned char *)malloc(size); /*分配記憶體*/

maxx=getmaxx();

maxy=getmaxy();

randomize();

printf("Press ESC to exit game! ");

printf(" %c to fast speed,%c to low speed!",24,25);

do{

ok=0;

if(play=="1")

ch=random(9)+48;

if(play=="2")

ch=random(26)+65;

str[0]=ch;

do{

while(bioskey(1)==0) /*如果沒有按鍵就不停的迴圈*/

{

if(l==1) /*從左到右*/

{

n++;

angle=-1*(n*step)/M_PI*180/R;

if((int)(-1*angle)%360<dalta)

angle-=dalta;

if(n>(maxx-180)/step){

if(starty>maxy-100)

starty=20;

else

starty+=y;

l=0;

}

}

if(l==0) /*從右到左*/

{

--n;

angle=-1*(n*step)/R/M_PI*180;

if((int)(-1*angle)%360<dalta)

angle-=dalta;

if(n==1){

if(starty>maxy-100)

starty=20;

else

starty+=y;

l=1;

}

}

draw_car(startx+n*step,starty,str);

}

temch=bioskey(0);

if(temch==FAST){

step+=10;

y+=10;

}

if(temch==LOW){

step-=10;

y-=10;

}

ok=temch&0x00ff;

if((ok==ch)||(ok==ch+32)){

ok=1;

starty=20;

break;

}

}while(temch!=ESC);

if(ok!=1)

break;

}while(1);

free(image);

closegraph();

return;

}

int draw_car(int x,int y,char *ch){

setcolor(YELLOW); /*設定前景色為黃色*/

rectangle(x,y,x+60,y+40); /*畫車廂*/

pieslice(x+15,y+50,angle,angle-dalta,10); /*畫輪上的小片扇形部分*/

pieslice(x+45,y+50,angle,angle-dalta,10);

setfillstyle(SOLID_FILL, YELLOW); /*設定填充模式為實填充，顏色為黃色*/

circle(x+15,y+50,10); /*畫車輪*/

circle(x+45,y+50,10);

circle(x+15,y+50,3);

circle(x+45,y+50,3);

setcolor(WHITE);

settextstyle(1,0,4);

outtextxy(x+25,y,ch);

getimage(x,y,x+60,y+60,image); /*獲取當前的圖片*/

delay(200);

putimage(x,y,image,XOR_PUT); /*使用異或模式將圖片顯示上去*/

return;

}