C语言实现画图程序

# include \"graphics.h\"
# include \"stdio.h\"
# include \"fcntl.h\"
# include \"stdlib.h\"
main()

void save(),load();
void *wg,*rg,*vg,*fy;
int driver,mode;
int c=RED;
int x=320,y=225;
int x1,y1,x2,y2;
int k,k1,k2;
/* initialize grapher */
detectgraph(&driver,&mode);
initgraph(&driver,&mode,\"c:\\tc\");

/* write the pen */
bar(200,10,206,16);
line(203,7,200,10);
line(203,7,206,10);
line(243,7,240,16);
line(243,7,246,16);
line(283,7,280,10);
line(283,7,286,10);
line(283,7,283,16);

/* save the pen */
wg=malloc(imagesize(200,7,206,16));
rg=malloc(imagesize(240,7,246,16));
vg=malloc(imagesize(280,7,286,16));
fy=malloc(imagesize(200,7,206,16));

getimage(200,7,206,16,wg);
getimage(240,7,246,16,rg);
getimage(280,7,286,16,vg);
cleardevice();

/* write the box */
setcolor(YELLOW);
rectangle(4,19,637,447);

x1=x-3;
y1=y+1;
x2=x+3;
y2=y+10;
getimage(x1,y1,x2,y2,fy);
putimage(x1,y1,vg,XOR_PUT);

/* receive the command */
for (;;)
while (bioskey(1)==0);
k=bioskey(0);
putimage(x1,y1,fy,AND_PUT);
if (((k&0x00ff)|0x00)==0)
k1=k&0xff?0:k>>8; /* k1 is the specialkey value */
else
k2=k&0x00ff; /* k2 is the non-specialkey value */
if (((k&0x00ff)|0x00)==0) /* Special key */
switch(k1)
case 45:
restorecrtmode();
exit(0);
case 72:
if (y>20)
y=y-1;
break;
case 75:
if (x>5)
x=x-1;
break;
case 77:
if (x<636)
x=x+1;
break;
case 80:
if (y<446)
y=y+1;
break;
case 71:
if ((x>5)&&(y>20))
x=x-1;
y=y-1;
break;
case 79:
if ((x>5)&&(y<446))
x=x-1;
y=y+1;
break;
case 73:
if ((x<636)&&(y>20))
x=x+1;
y=y-1;
break;
case 81:
if ((x<636)&&(y<446))
x=x+1;
y=y+1;
break;

x1=x-3;
y1=y+1;
x2=x+3;
y2=y+10;
getimage(x1,y1,x2,y2,fy);
/* non-special key */[Page]
switch(k2)
case 118: /* \'v\' */
case 86: /* \'V\' */
putimage(x1,y1,vg,OR_PUT);
break;
case 119: /* \'w\' */
case 87: /* \'W\' */
putimage(x1,y1,wg,OR_PUT);
putpixel(x,y,c);
break;
case 114: /* \'r\' */
case 82: /* \'R\' */
putimage(x1,y1,rg,OR_PUT);
putpixel(x,y,BLACK);
break;
case 115: /* \'s\' */
case 83: /* \'S\' */
save(\"pic.dat\");
break;
case 101: /* \'e\' */
case 69: /* \'E\' */
load(\"pic.dat\");
break;
case 99: /*\'c\'*/
case 67: /*\'C\'*/
setcolor(RED);
circle(x,y,20);
break;
default:continue;

/* function for screen picture save
*/
void save(char *fname)

FILE *fp;
int i;
register long j;
char far *ptr;

fp=fopen(fname,\"wb\");
for(i=0;i<4;i++)

outportb(0x3CE,4);
outportb(0x3CF,i);
ptr=(char far *) 0xA0000000L;
for (j=0;j<38400L;j++)
putc(*ptr,fp);
ptr++;

fclose(fp);
outportb(0x3CF,0);

/* function for screen picture display
*/
void load(char *fname)

FILE *fp;
register int i;
int k4=1;
register long j;
char far *ptr;

fp=fopen(fname,\"rb\");
for (i=0;i<4;i++)

outportb(0x3C4,2);
outportb(0x3C5,k4);
ptr=(char far *)0xA0000000L;
for (j=0;j<38400L;j++)

*ptr=getc(fp);
ptr++;

k4*=2;

fclose(fp);
outportb(0x3C5,0xF);