#include<graphics.h>

#include<conio.h>

#include<stdio.h>

#include<stdlib.h>

#include<alloc.h>

#define ESC  0x1b            /*ESC的ASCII碼，十六進制數*/

void InstallGraph(void);    /*圖形初始化函數的聲明*/

void DrawGun(void);         /*畫發射架函數的聲明*/

void DrawPlan(void);        /*畫火箭函數的聲明*/

void DrawStar(void);        /*畫星函數的聲明*/


void *buf;                  /*全局變量，用于存儲火箭的圖像*/

int x0=300;                 /*以下是火箭的位置初始化參數*/

int y0=340;

int width1=5;

int width2=20;

int height=25;

int y1=8;

int y2=15;

int y3=23;

int y4=38;

main()

{

int size;

int i=0;

int key;

int station;

InstallGraph();

setbkcolor(BLACK);          /*設置背景顏色*/

cleardevice();

setcolor(BLUE);             /*設置字的顏色*/

outtextxy(80,100,"Ready!...Any key to SET OFF !!!");

DrawGun();

getch();

cleardevice();

DrawGun();

DrawPlan();

DrawStar();

setcolor(LIGHTRED);



do{putimage(x0-width2,y0-height-3*width1-i,buf,XOR_PUT);/*主循環開始，用于移動火箭，方法是用異或方式在屏幕上連續畫出火箭的圖像，每畫一次，新圖像和原來的位置相差兩個像素點。這個值越大，飛行速度越快*/


i+=2;                                                

putimage(x0-width2,y0-height-3*width1-i,buf,XOR_PUT);
key=getch();                                        

if(y0-height-3*width1-i==0)                         

outtextxy(60,100,"Successfully!!! Press ESC to quit");

if(key==ESC)                                        

      {

        if(y0-height-3*width1-i>0){

cleardevice();

outtextxy(100,100,"Failue. What did you do?");

outtextxy(130,300,"Press any key to quit.");

getch();

        }

}

}

while(key!=ESC);

free(buf);

closegraph();

return 0;       }


void InstallGraph(void)  /*圖形初始化函數*/

{

int grdriver=DETECT;

int grmode;

int errorcode;

char *errormsg;

initgraph(&grdriver,&grmode," ");

errorcode=graphresult();

errormsg=grapherrormsg(errorcode);

if(errorcode!=grOk){

printf("Graphics error: %s\n",errormsg);

printf("Press any key to exit.\n");

getch();

exit(1);

}

}

void DrawStar(void)         /*畫星函數*/

{

int seed=2000;

int i,dotx,doty,height,width,color,maxcolor;

maxcolor=getmaxcolor();

width=getmaxx();

height=getmaxy();

srand(seed);

for(i=0;i<250;i++){

dotx=i+random(width-1);

doty=i+random(height-1);

color=random(maxcolor);

setcolor(color);

putpixel(dotx,doty,color);

circle(dotx+1,doty+1,1);

}

srand(seed);

}

void DrawGun(void)   /*畫發射架函數*/

{

int x0=300;

int y0=430;

int height=45;

int rx=20;

int ry=5;

int rightx,righty,leftx,lefty;

int centery1=30;

rightx=righty=leftx=lefty=12;

setcolor(LIGHTGREEN);

ellipse(x0,y0,180,360,rx,ry);

ellipse(x0,y0-height,0,360,rx,ry);

line(x0+rx,y0,x0+rx,y0-height);

line(x0-rx,y0,x0-rx,y0-height);

moveto(x0+rx,y0);

lineto(x0+rx+rightx,y0+righty);

moveto(x0+rx+rightx,y0+righty);

lineto(x0+rx+rightx+10,y0+righty+10);

circle(x0+rx+rightx+10,y0+righty+10,4);

moveto(x0,y0+ry);

lineto(x0,y0+centery1);

moveto(x0,y0+centery1);

lineto(x0,y0+centery1+10);

circle(x0,y0+centery1+10,4);

moveto(x0-rx,y0);

lineto(x0-rx-leftx,y0+lefty);

moveto(x0-rx-leftx,y0+lefty);

lineto(x0-rx-leftx-10,y0+lefty+10);

circle(x0-rx-leftx-10,y0+lefty+10,4);

line(x0-rx-leftx,y0+lefty,x0,y0+centery1);

line(x0,y0+centery1,x0+rx+rightx,y0+righty);

}

void DrawPlan(void)  /*發射火箭函數*/

{

int size;

setcolor(LIGHTRED);

setfillstyle(1,BLUE);

ellipse(x0,y0-height,0,180,width1,3*width1);

moveto(x0+width1,y0);

lineto(x0+width1,y0-height);

moveto(x0+width1,y0);

lineto(x0+width2,y0+y2);

moveto(x0-width1,y0);

lineto(x0-width1,y0-height);

moveto(x0-width1,y0);

lineto(x0-width2,y0+y2);

moveto(x0+width2,y0+y3);

lineto(x0+width2,y0+y1);

moveto(x0+width2,y0+y3);

lineto(x0+width1,y0+y2);

moveto(x0-width2,y0+y3);

lineto(x0-width2,y0+y1);

moveto(x0-width2,y0+y3);

lineto(x0-width1,y0+y2);

moveto(x0,y0+y4);

lineto(x0+width1,y0+y2);

moveto(x0,y0+y4);

lineto(x0-width1,y0+y2);

setfillstyle(2,LIGHTRED);

floodfill(x0,y0,LIGHTRED);

size=imagesize(x0-width2-1,y0-height-3*width1,x0+width2+1,y0+y4);

buf=malloc(size);

if(!buf){printf("No enough memory!");

exit(0);}

getimage(x0-width2,y0-height-3*width1,x0+width2,y0+y4,buf);

}