paint program in c language. I am giving you a full code of that program, you can download or see. if you like it then please share or like... thank you, friend.

1. Paint program in c language
#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#include<dos.h>
#include<stdlib.h>
#include<math.h>
#define INCR1
#define DECR-1
#define PREDX1
#define PREDY0
int gm,gd=DETECT,button,x,y,ch,fg,bg,dx,dy,e, e_inc,e_noinc,j,w,h;
union REGS i,o;

2. struct SREGS s ;
char str[10];
char buffer[3000];
int hourglass[32]={
/*hourglassscreenmask*/
0x0000,0x0000,0x0000,0x0000,
0x8001,0xc003,0xf00f,0xfc3f,
0xfc3f,0xf00f,0xc003,0x8001,
0x0000,0x0000,0x0000,0x0000,
/*the mouse ptr bitmap*/
0xffff,0x8001,0xffff,0x8001,
0x4002,0x2004,0x1008,0x0240,
0x0240,0x0810,0x2004,0x4002,
0x8001,0xffff,0x8001,0xffff};
intplus[32]={
/*+ screenmask*/
0xfe7f,0xfe7f,0xfe7f,0xfe7f,
0xfe7f,0xfe7f,0xfe7f,0x0000,
0x0000,0xfe7f,0xfe7f,0xfe7f,
0xfe7f,0xfe7f,0xfe7f,0xfe7f,
/*+mouseptrbitmap*/
0x0180,0x0180,0x0180,0x0180,
0x0180,0x0180,0x0180,0xfe7f,
0xfe7f,0x0180,0x0180,0x0180,
0x0180,0x0180,0x0180,0x0180};

3. intrubber[32]={
/*Eraser screenmask*/
0x0000,0x0000,0x0000,0x0000,
0x0000,0x0000,0x0000,0x0000,
0x0000,0x0000,0x0000,0x0000,
0x0000,0x0000,0x0000,0x0000,
/*eraserbitmap*/
0xffff,0x8001,0x8001,0x8001,
0x8001,0x8001,0x8001,0x8001,
0x8001,0x8001,0x8001,0x8001,
0x8001,0x8001,0x8001,0xffff};
inthand[32]={/*hand-screenmask+pointerbitmap*/
0xe1ff,0xe1ff,0xe1ff,0xe1ff,
0xe1ff,0x0000,0x0000,0x0000,
0x0000,0x0000,0x0000,0x0000,
0x0000,0x0000,0x0000,0x0000,
0x1e00,0x1200,0x1200,0x2100,
0x13ff,0x1249,0x1249,0xf249,
0x9001,0x9001,0x9001,0x8001,
0x8001,0x8001,0xffff,0x0000};
intpencil[32] = {
0x3ff ,0x5ff ,0x6ff ,0x1b7f,
0x1dbf,0x6edf,0xb76f,0xdbb7,
0xeddb,0xf6ed,0xfb76,0xfdb8,

4. 0xfed9,0xff63,0xffa7,0xffcf,
0xfc00,0xfa00,0xf900,0xe480,
0xe240,0x9120,0x4890,0x2448,
0x1224,0x912 ,0x489 ,0x247 ,
0x126 ,0x9c ,0x58 ,0x30 };
intbottle[32]={
0x0000,0xbffe,0xdffe,0xeffe,
0xf7fe,0xf7fe,0xf7fe,0xf7fe,
0xf000,0xf000,0xf000,0xf7fe,
0xf7fe,0xf7fe,0xf7fe,0xf000,
0xffff,0x4001,0x2001,0x1001,
0x801 ,0x801 ,0x801 ,0x801 ,
0xfff ,0xfff ,0xfff ,0x801,
0x801 ,0x801 ,0x801 ,0xfff };
char NEW[]={"CreatesA NewFile"};
char OPEN[]={"OpensAnExistingFile"};
char SAVE[]={"SavesThe Active File"};
char ABOUT[]={"DisplaysInformationAboutProgram"};
char PENCIL[]={"DrawsA Free FormLine One Pixel Width"};
char PAINT[]={"FillsAnAreaWithCurrentDrawingColourselectdraw colorby rightclick"};
char RECTANGLE[]={"DrawsA Rectangle"};
char ELLIPSE[]={"DrawsAn Ellipse"};

5. char LINE[]={"DrawsA StraightLine"};
char POLYLINE[]={"DrawsA Polygon"};
char COLOUR[]={"Left Click ->ForegroundColor RightClick ->BackgroundColor"};
char ERASER[]={"ErasesA PortionOf Figure"};
char EXIT[]={"QuitsProgram"};
voidinitialize();
voidstructure();
int getresponse();
int check();
int initmouse();
voidshowmouseptr();
voidrestrictmouseptr(int,int,int,int);
voidgetmousepos();
voidhidemouseptr();
voidfreehand();
voidrect();
voidcirc();
voidlin();
voidmypoly();
voidpaint();
voideraser();
voidchangemouseptr(int*);
voidprintmousepos();
voidNew();

6. voidOpen();
int restore(int,int,int,int,char*);
voidSave();
voidAbout();
voidbressline( int,int,int,int);
voidbressline1( int,int,int,int);
voiddrawline ( int,int , int, int, int, int );
voiddrawline1( int, int, int,int, int,int);
voidEllipse(int,int,int,int);
voidEllipse1(int,int,int,int);
voidsave(int,int,int,int,char*);
voidclearline();
voidmain()
{
intpch=1;
clrscr();
initialize();
structure();
showmouseptr();
while(1)
{
setcolor(fg);
rectangle(35,40,600,450);
ch=getresponse();

7. if(ch==0||ch==35)
ch=pch;
switch(ch)
{
case 1: rect(); break;
case 2: freehand();break;
case 3: circ(); break;
case 4: eraser(); break;
case 5: lin(); break;
case 6: paint(); break;
case 7: mypoly(); break;
case 30:
if(ch!=pch)
New();
break;
case 31:
if(ch!=pch)
Open();
break;
case 32:
if(ch!=pch)
Save();
break;
case 33:

8. if(ch!=pch)
About();
break;
case 34:
if(ch!=pch)
closegraph();
remove("c:/temp.tmp");
exit(0);
default:
if(button==1)
{
fg=ch-10;
setfillstyle(SOLID_FILL,fg);
setcolor(15);
bar(2,445,17,465);
rectangle(2,445,17,465);
setcolor(fg);
rectangle(35,40,600,450);
}
else if(button==2)
{
bg=ch-10;
setcolor(15);
setfillstyle(SOLID_FILL,bg);
bar(10,455,25,475);

9. rectangle(10,455,25,475);
setfillstyle(SOLID_FILL,fg);
bar(2,445,17,465);
rectangle(2,445,17,465);
setcolor(fg);
}
else
setcolor(4);
outtextxy(35,457,COLOUR);
setcolor(fg);
break;
}
if(ch>30&&ch<=33||ch>=10&&ch<=25)
pch=pch;
else
pch=ch;
}
}
voidinitialize()
{
initgraph(&gd,&gm,"c:turboc3bgi");
if(initmouse()==0)
{
closegraph();
printf("nMouseDriverisnotpresent");

10. getch();
exit(0);
}
}
initmouse()
{
i.x.ax=0;
int86(0x33,&i,&o);
return(o.x.ax);
}
voidshowmouseptr()
{
i.x.ax=1;
int86(0x33,&i,&o);
}
voidrestrictmouseptr(intx1,inty1,intx2,inty2)
{
i.x.ax=7;
i.x.cx=x1;
i.x.dx=x2;
int86(0x33,&i,&o);
i.x.ax=8;
i.x.cx=y1;
i.x.dx=y2;
int86(0x33,&i,&o);

11. }
voidgetmousepos()
{
i.x.ax=3;
int86(0x33,&i,&o);
button=o.x.bx;
x=o.x.cx;
y=o.x.dx;
}
voidhidemouseptr()
{
i.x.ax=2;
int86(0x33,&i,&o);
}
voidprintmousepos()
{
intx1,y1,x2,y2,i,j,col;
col=getcolor();
setcolor(11);
x1=515+textwidth("x:");
y1=455+1;
x2=x1+textwidth(str);
y2=y1+textheight(str);

12. for(i=x1;i<=x2;i++)
for(j=y1;j<=y2;j++)
putpixel(i,j,7);
outtextxy(515,455,"x: y: ");
sprintf(str,"%3d %3d",x-35,y-40);
outtextxy(x1,y1,str);
setcolor(col);
}
voidchangemouseptr( int*shape )
{
i.x.ax =9 ; /* service number*/
i.x.bx =0 ; /* actual cursor positionfromleft*/
i.x.cx = 0 ; /* actual cursor positionfromtop*/
i.x.dx =( unsigned) shape ; /* offsetaddressof pointerimage */
segread( &s ) ;
s.es= s.ds ; /* segmentaddressof pointer*/
int86x ( 0x33, &i,&i, &s ) ;
}
intcheck()
{
introw1,row2,i,flag=0,col1,col2;
for(row1=100,i=1;i<=7;i++,row1=row1+45)

13. {
row2=row1+20;
if(x>7&&x<27&&y>row1&&y<row2)
{
flag=1;
goto down;
}
}
for(row1=50,i=10;i<=25;i++,row1=row1+25)
{
row2=row1+20;
if(x>610&&x<630&&y>row1&&y<row2)
{
flag=1;
goto down;
}
}
for(i=30;i<=34;i++)
{
if(i==30)
{ col2=260;col1=220; }
else if(i==31)
{
col1=270;col2=310;
}

14. else if(i==32)
{
col1=320;col2=360;
}
else if(i==33)
{
col1=370;col2=420; }
else
{ col1=427;col2=465; }
if(x>col1&&x<col2&&y>20&&y<35)
{
if(button==1)
{
flag=1;
break; }
}
}
down:
if(flag==1)
returni;
else
return0;
}
intgetresponse()
{

15. intcol,X;
staticint bn;
staticint pbn;
staticint flag;
col=getcolor();
getmousepos();
bn=check();
if(bn>=0&&bn<=7||bn>=10)
{
if(pbn!=bn)
{
switch(pbn)
{
case 1: setcolor(15);
hidemouseptr();
rectangle(7,100,27,120);
showmouseptr();
break;
case 2: setcolor(15);
hidemouseptr();
rectangle(7,145,27,165);

16. showmouseptr();
break;
case 3: setcolor(15);
hidemouseptr();
rectangle(7,190,27,210);
showmouseptr();
break;
case 4: setcolor(15);
hidemouseptr();
rectangle(7,235,27,255);
showmouseptr();
break;
case 5: setcolor(15);
hidemouseptr();
rectangle(7,280,27,300);
showmouseptr();
break;
case 6: setcolor(15);
hidemouseptr();
rectangle(7,325,27,345);
showmouseptr();
break;
case 7: setcolor(15);
hidemouseptr();
rectangle(7,370,27,390);

17. showmouseptr();
break;
case 0: clearline();
}
}
switch(bn)
{
case 1: if(pbn!=bn)
{ setcolor(RED);
hidemouseptr();
rectangle(7,100,27,120);
showmouseptr();
flag=0;
outtextxy(35,457,RECTANGLE);
}
else if(button==1)
{
setcolor(13);
hidemouseptr();
rectangle(7,100,27,120);
showmouseptr();
flag=1;
}
break;
case 2: if(pbn!=bn)

18. {
setcolor(RED);
hidemouseptr();
rectangle(7,145,27,165);
showmouseptr();
flag=0;
outtextxy(35,457,PENCIL);
}
else if(button==1)
{
setcolor(13);
hidemouseptr();
rectangle(7,145,27,165);
showmouseptr();
flag=1;
}
break;
case 3: if(pbn!=bn)
{
setcolor(RED);
hidemouseptr();
rectangle(7,190,27,210);
showmouseptr();

19. flag=0;
outtextxy(35,457,ELLIPSE);
}
else if(button==1)
{
setcolor(13);
hidemouseptr();
rectangle(7,190,27,210);
showmouseptr();
flag=1;
}
break;
case 4: if(pbn!=bn)
{
setcolor(RED);
hidemouseptr();
rectangle(7,235,27,255);
showmouseptr();
flag=0;
outtextxy(35,457,ERASER);
}
else if(button==1)
{

20. setcolor(13);
hidemouseptr();
rectangle(7,235,27,255);
showmouseptr();
flag=1;
}
break;
case 5: if(pbn!=bn)
{
setcolor(RED);
hidemouseptr();
rectangle(7,280,27,300);
showmouseptr();
flag=0;
outtextxy(35,457,LINE);
}
else if(button==1)
{
setcolor(13);
hidemouseptr();
rectangle(7,280,27,300);
showmouseptr();
flag=1;
}
break;

21. case 6: if(pbn!=bn)
{
setcolor(RED);
hidemouseptr();
rectangle(7,325,27,345);
showmouseptr();
flag=0;
outtextxy(35,457,PAINT);
}
else if(button==1)
{
setcolor(13);
hidemouseptr();
rectangle(7,325,27,345);
showmouseptr();
flag=1;
}
break;
case 7: if(pbn!=bn)
{
setcolor(RED);
hidemouseptr();
rectangle(7,370,27,390);
showmouseptr();
flag=0;

22. outtextxy(35,457,POLYLINE);
}
else if(button==1)
{
setcolor(13);
hidemouseptr();
rectangle(7,370,27,390);
showmouseptr();
flag=1;
}
break;
case 30: if(button==1)
{
flag=1;
}
else if(pbn!=bn)
{
clearline();
setcolor(4);
outtextxy(35,457,NEW);
flag=0;
}
break;
case 31: if(button==1)

23. {
flag=1;
}
else if(pbn!=bn)
{
clearline();
setcolor(4);
outtextxy(35,457,OPEN);
flag=0;
}
break;
case 32: if(button==1)
{
flag=1;
}
else if(pbn!=bn)
{
clearline();
setcolor(4);
outtextxy(35,457,SAVE);
flag=0;
}
break;

24. case 33: if(button==1)
{
flag=1;
}
else if(pbn!=bn)
{
clearline();
setcolor(4);
outtextxy(35,457,ABOUT);
flag=0;
}
break;
case 34: if(button==1)
{
flag=1;
}
else if(pbn!=bn)
{
clearline();
setcolor(4);
outtextxy(35,457,EXIT);
flag=0;
}

25. break;
case 0: clearline();
default:
flag=1;
}
}
setcolor(col);
pbn=bn;
if(flag==1)
{
flag=0;
return(bn);
}
else
return(0);
}
voidfreehand()
{
intpx=1,py=1,flag=0,but;
while(1)
{
getmousepos();
if(x>=35&&x<=600&&y>=40&&y<=450)

26. {
changemouseptr(pencil);
if(px!=x||py!=y)
printmousepos();
if(button==1)
{
if(flag==0)
{
hidemouseptr();
flag=1;
}
else
line(px,py,x,y);
}
else if(flag!=0)
{
showmouseptr();
flag=0;
}
px=x;
py=y;
}

27. else
{
changemouseptr(hand);
showmouseptr();
break;
}
}
}
voidrect()
{
intix,iy,fx,fy,px=1,py=1,but,flag=0,tx,ty,t=0;
while(1)
{
getmousepos();
if(x>=35&&x<=600&&y>=40&&y<=450)
{
if(button==1&&t==0)
{
tx=x;ty=y;
t=1;
}
changemouseptr(plus);
if(px!=x||py!=y)

28. printmousepos();
if(button==1&&flag==0)
{
ix=x;iy=y;
flag=1;
}
else if(button==1&& flag==1 )
{
fx=x;fy=y;
hidemouseptr();
setcolor(fg);
rectangle(tx,ty,fx,fy);
setcolor(bg);
rectangle(tx,ty,fx,fy);
showmouseptr();
flag=0;
}
if(button!=1)
{
setcolor(fg);
rectangle(tx,ty,fx,fy);
t=0;

29. }
}
else
{
if(t==1)
{
setcolor(fg);
rectangle(tx,ty,fx,fy);
}
t=0;
changemouseptr(hand);
break;
}
px=x;
py=y;
}
}
voidcirc()
{
int ix,iy,but,flag=0,p,q,a,b,p1,q1,a1,b1,px,py;
while(1)
{
getmousepos();
if(x>=35&&x<=600&&y>=40&&y<=450)

30. {
changemouseptr(pencil);
if(px!=x||py!=y)
{
printmousepos();
}
if(button==1)
{
if(flag==0)
{
hidemouseptr();
ix=x;iy=y;
p1=q1=a1=b1=0;
flag=1;
}
else
{
p=(ix+x)/2;
q=(iy+y)/2;
a=abs(ix-p);
b=abs(iy-q);
if(p1!=p||q1!=q)
{
Ellipse1(p1,q1,a1,b1);

31. Ellipse(p,q,a,b);
p1=p;q1=q;a1=a;b1=b;
}
}
}
else if(flag!=0)
{
showmouseptr();
flag=0;
}
px=x;
py=y;
}
else
{
changemouseptr(hand);
showmouseptr();
break;
}
}
}
voidlin()
{
intix,iy,px=1,py=1,but,flag=0;

32. while(1)
{
getmousepos();
if(x>=35&&x<=600&&y>=40&&y<=450)
{
changemouseptr(pencil);
if(px!=x||py!=y)
{
printmousepos();
}
if(button==1)
{
if(flag==0)
{
hidemouseptr();
ix=px=x;iy=py=y;
flag=1;
}
else
{
if(px!=x||py!=y)
{
bressline1(ix,iy,px,py);
bressline(ix,iy,x,y);

33. }
}
}
else if(flag!=0)
{
showmouseptr();
flag=0;
}
px=x;
py=y;
}
else
{
changemouseptr(hand);
break;
}
}
}
voidmypoly()
{
intix,iy,fx,fy,px=1,py=1,but,flag=0;
while(1)
{

34. getmousepos();
if(x>=35&&x<=600&&y>=40&&y<=450)
{
changemouseptr(pencil);
if(px!=x||py!=y)
printmousepos();
/* if(button==1&&flag==0)
{
ix=x;iy=y;
flag=1;
}*/
if(button==1)
{
hidemouseptr();
// line(ix,iy,x,y);
lin();
showmouseptr();
ix=x;
iy=y;
}
}
else
{

35. changemouseptr(hand);
break;
}
px=x;
py=y;
}
}
voidpaint()
{
intpx=1,py=1,but;
setfillstyle(SOLID_FILL,bg);
while(1)
{
getmousepos();
if(x>=35&&x<=600&&y>=40&&y<=450)
{
changemouseptr(bottle);
if(px!=x||py!=y)
printmousepos();
if(button==1)
{

36. hidemouseptr();
floodfill(x,y,fg);
showmouseptr();
}
}
else
{
changemouseptr(hand);
break;
}
px=x;
py=y;
}
}
voideraser()
{
intbut,px,py,i,j;
while(1)
{
getmousepos();
if(x>=36&&x<=583&&y>=41&&y<=433)
{
changemouseptr(rubber);
if(px!=x||py!=y)
printmousepos();

37. if(button==1)
{
hidemouseptr();
for(i=y;i<=y+16;i++)
for(j=x;j<=x+16;j++)
{
putpixel(j,i,bg);
}
showmouseptr();
}
}
else
{
changemouseptr(hand);
break;
}
px=x;
py=y;
}
}
voidstructure()
{
inti,j,row;
setfillstyle(SOLID_FILL,8);

38. setcolor(15);
bar(0,0,640,480); //screenback ground
settextstyle(SMALL_FONT,HORIZ_DIR,4);
for(i=0,row=50;i<=15;i++,row+=25)
{
setfillstyle(SOLID_FILL,i); //color tool bars
bar(610,row,630,row+20);
rectangle(610,row,630,row+20);
}
setfillstyle(SOLID_FILL,8); // draw tool bars
setcolor(15);
for(i=0,row=100;i<=6;i++,row+=45)
{
bar(7,row,27,row+20);
rectangle(7,row,27,row+20);
}
setcolor(11);
rectangle(9,104,25,116); // rectangle tool bar
line(9,147,15,147); //pencil tool

39. line(9,148,14,148);
line(9,149,13,149);
line(9,150,12,150);
line(9,151,11,151);
line(9,152,10,152);
line(9,147,9,153);
line(15,147,24,156);
line(9,153,18,162);
line(24,156,18,162);
line(15,147,9,153);
line(12,150,21,159);
circle(17,200,8); // circle tool
setcolor(11); // erasertool
setfillstyle(SOLID_FILL,11);
bar3d(9,246,17,252,8,1);
setcolor(11);
line(10,283,24,297); //line tool
rectangle( 9,333,25,343); // fill areatool
arc(17,333,0,180,7);
line(12,388,22,388); //polygontool

40. line(12,388,9,380);
line(22,388,25,380);
line(17,372,25,380);
line(17,372,9,380);
fg=15; //assigncolors
bg=0;
setfillstyle(SOLID_FILL,bg); // bottomcornersymbol
bar(10,455,25,475);
setcolor(15);
rectangle(10,455,25,475);
setfillstyle(SOLID_FILL,fg);
bar(2,445,17,465);
rectangle(2,445,17,465);
setcolor(fg);
rectangle(35,40,600,450);
setfillstyle(SOLID_FILL,bg);
floodfill(320,240,fg);
// outtextxy(230,20,"NEW OPEN SAVE ABOUT EXIT");
setcolor(0);
bar(220,20,260,35);
bar(270,20,310,35);
bar(320,20,360,35);
bar(370,20,420,35);

41. bar(427,20,465,35);
setcolor(15);
rectangle(220,20,260,35);
rectangle(270,20,310,35);
rectangle(320,20,360,35);
rectangle(370,20,420,35);
rectangle(427,20,465,35);
outtextxy(230,20,"NEW OPEN SAVE ABOUT EXIT");
}
voidbressline( intx1,int y1, intx2, inty2 )
{
intincdec,t, i ;
if ( x1 > x2 )
{
t = x1 ; x1 = x2 ; x2 = t ;
t = y1 ; y1 = y2 ; y2 = t ;
}
dx = x2 - x1 ; dy = y2 - y1 ;
if ( dx == 0 ) /* vertical line */
{
if ( y1 > y2 )

42. {
t = y1 ; y1 = y2 ; y2 = t ;
}
for ( i = y1,j=0 ; i <= y2 ; i++,j++ )
{
buffer[j]=getpixel (x1,i);
putpixel ( x1,i,fg) ;
}
return;
}
if ( dy == 0 ) /* horizontal line */
{
for ( i = x1,j=0 ; i < x2 ; i++ ,j++)
{
buffer[j]=getpixel (i,y1);
putpixel ( i,y1,fg ) ;
}
return;
}
/* 0 < m < 1 */
if ( dy < dx && dy > 0 )
{
e_noinc= 2 * dy;

43. e = 2 * dy - dx ;
e_inc= 2 * ( dy - dx ) ;
drawline ( x1,y1, x2, y2, PREDX,INCR) ;
}
/* m = 1 */
if ( dy == dx && dy > 0 )
{
e_noinc= 2 * dy;
e = 2 * dy - dx ;
e_inc= 2 * ( dy - dx ) ;
drawline ( x1,y1, x2, y2, PREDX,INCR) ;
}
/* 1 < m < infinity*/
if ( dy > dx && dy > 0 )
{
e_noinc= 2 * dx ;
e = 2 * dx - dy;
e_inc= 2 * ( dx - dy ) ;
drawline ( x1,y1, x2, y2, PREDY, INCR) ;
}
/* 0 > m > -1 */
if ( -dy< dx && dy < 0 )
{
dy = -dy;
e_noinc= 2 * dy;

44. e = 2 * dy - dx ;
e_inc= 2 * ( dy - dx ) ;
drawline ( x1,y1, x2, y2, PREDX,DECR ) ;
}
/* m = -1 */
if ( dy == -dx && dy< 0 )
{
dy = -dy;
e_noinc= ( 2 * dy ) ;
e = 2 * dy - dx ;
e_inc= 2 * ( dy - dx ) ;
drawline ( x1,y1, x2, y2, PREDX,DECR ) ;
}
/* -1 > m > 0 */
if ( -dy> dx && dy < 0 )
{
dx = -dx ;
e_noinc= - ( 2*dx ) ; e = 2 * dx - dy;
e_inc= - 2 * ( dx - dy ) ;
drawline ( x2,y2, x1, y1, PREDY, DECR ) ;
}
}
voidbressline1( intx1,inty1, intx2, inty2 )
{

45. intincdec,t, i ;
if ( x1 > x2 )
{
t = x1 ; x1 = x2 ; x2 = t ;
t = y1 ; y1 = y2 ; y2 = t ;
}
dx = x2 - x1 ; dy = y2 - y1 ;
if ( dx == 0 ) /* vertical line */
{
if ( y1 > y2 )
{
t = y1 ; y1 = y2 ; y2 = t ;
}
for ( i = y1,j=0 ; i <= y2 ; i++,j++ )
{
putpixel ( x1,i,buffer[j] ) ;
}
return;
}
if ( dy == 0 ) /* horizontal line */

46. {
for ( i = x1,j=0 ; i < x2 ; i++ ,j++)
{
putpixel ( i,y1,buffer[j] ) ;
}
return;
}
/* 0 < m < 1 */
if ( dy < dx && dy > 0 )
{
e_noinc= 2 * dy;
e = 2 * dy - dx ;
e_inc= 2 * ( dy - dx ) ;
drawline1( x1,y1,x2, y2, PREDX,INCR ) ;
}
/* m = 1 */
if ( dy == dx && dy > 0 )
{
e_noinc= 2 * dy;
e = 2 * dy - dx ;
e_inc= 2 * ( dy - dx ) ;
drawline1( x1,y1,x2, y2, PREDX,INCR ) ;
}
/* 1 < m < infinity*/
if ( dy > dx && dy > 0 )

47. {
e_noinc= 2 * dx ;
e = 2 * dx - dy;
e_inc= 2 * ( dx - dy ) ;
drawline1( x1,y1, x2, y2, PREDY, INCR) ;
}
/* 0 > m > -1 */
if ( -dy< dx && dy < 0 )
{
dy = -dy;
e_noinc= 2 * dy;
e = 2 * dy - dx ;
e_inc= 2 * ( dy - dx ) ;
drawline1( x1,y1, x2, y2, PREDX, DECR ) ;
}
/* m = -1 */
if ( dy == -dx && dy< 0 )
{
dy = -dy;
e_noinc= ( 2 * dy ) ;
e = 2 * dy- dx ;
e_inc= 2 * ( dy - dx ) ;
drawline1( x1,y1,x2, y2, PREDX,DECR ) ;
}
/* -1 > m > 0 */

48. if ( -dy> dx && dy < 0 )
{
dx = -dx ;
e_noinc= - ( 2*dx ) ; e = 2 * dx - dy;
e_inc= - 2 * ( dx - dy ) ;
drawline1( x2,y2,x1, y1, PREDY, DECR ) ;
}
}
voiddrawline ( intx1,inty1, int x2,int y2, intpred,intincdec)
{
inti, start,end,var ;
if ( pred== PREDX )
{ start = x1 ; end= x2 ; var = y1 ;}
else
{ start = y1 ; end= y2 ; var = x1 ;}
for ( i = start,j=0 ; i <= end; i++,j++ )
{
if ( pred== PREDY )
{
buffer[j]=getpixel (var,i);
putpixel ( var,i,fg) ;
}
else

49. {
buffer[j]=getpixel (i,var);
putpixel ( i,var,fg) ;
}
if ( e < 0 )
e += e_noinc;
else
{
var += incdec;
e += e_inc;
}
}
}
voiddrawline1( intx1,int y1, intx2, inty2, int pred,intincdec)
{
inti, start,end,var ;
if ( pred== PREDX )
{
start = x1 ; end= x2 ; var = y1 ;
}
else
{
start = y1 ; end= y2 ; var = x1 ;
}

50. for ( i = start,j=0 ; i <= end; i++,j++ )
{
if ( pred== PREDY )
{
putpixel ( var,i,buffer[j]);
}
else
{
putpixel ( i,var,buffer[j] ) ;
}
if ( e < 0 )
e += e_noinc;
else
{
var += incdec;
e += e_inc;
}
}
}
voidEllipse(intxc,intyc,inta0,intb0)
{
intx = 0;
inty = b0;

51. longa= a0;
longb = b0;
longAsquared= a*a;
longTwoAsquared=2 * Asquared;
longBsquared= b*b;
longTwoBsquared= 2 * Bsquared;
longd;
longdx,dy;
d = Bsquared - Asquared*b+ Asquared/4;
dx = 0;
dy = TwoAsquared*b;
j=0;
while (dx <dy)
{
buffer[j]=getpixel(xc+x,yc + y);j++;
buffer[j]=getpixel(xc- x,yc+ y);j++;
buffer[j]=getpixel(xc+x,yc - y);j++;

52. buffer[j]=getpixel(xc- x,yc- y);j++;
putpixel(xc+x, yc + y,fg);
putpixel(xc- x,yc + y,fg);
putpixel(xc+x, yc - y,fg);
putpixel(xc- x,yc - y, fg);
if (d > 0)
{
--y;
dy -= TwoAsquared;
d-=dy;
}
++x;
dx+=TwoBsquared;
d += Bsquared+ dx;
}
d += (3 *(Asquared-Bsquared)/2-(dx+dy))/ 2;
while (y>=0)
{
buffer[j]=getpixel(xc+x,yc + y);j++;
buffer[j]=getpixel(xc- x,yc+ y);j++;

53. buffer[j]=getpixel(xc+x,yc - y);j++;
buffer[j]=getpixel(xc- x,yc- y);j++;
putpixel(xc+x, yc + y,fg);
putpixel(xc- x,yc + y,fg);
putpixel(xc+x, yc - y,fg);
putpixel(xc- x,yc - y, fg);
if (d < 0) {
++x;
dx+= TwoBsquared;
d+= dx;
}
--y;
dy -= TwoAsquared;
d+= Asquared - dy;
}
}
voidEllipse1(intxc,intyc,inta0,intb0)
{
intx = 0;
inty = b0;
longa= a0;

54. longb = b0;
longAsquared= a*a;
longTwoAsquared=2 * Asquared;
longBsquared= b*b;
longTwoBsquared= 2 * Bsquared;
longd;
longdx,dy;
d = Bsquared - Asquared*b+ Asquared/4;
dx = 0;
dy = TwoAsquared*b;
j=0;
while (dx <dy)
{
putpixel(xc+x, yc + y,buffer[j]);j++;
putpixel(xc- x,yc + y,buffer[j]);j++;
putpixel(xc+x, yc - y,buffer[j]);j++;
putpixel(xc- x,yc - y,buffer[j]);j++;
if (d > 0)

55. {
--y;
dy -= TwoAsquared;
d-=dy;
}
++x;
dx+=TwoBsquared;
d += Bsquared+ dx;
}
d += (3 *(Asquared-Bsquared)/2-(dx+dy))/2;
while (y>=0)
{
putpixel(xc+x, yc + y,buffer[j]);j++;
putpixel(xc- x,yc + y,buffer[j]);j++;
putpixel(xc+x, yc - y,buffer[j]);j++;
putpixel(xc- x,yc - y,buffer[j]);j++;
if (d < 0) {
++x;
dx+= TwoBsquared;
d+= dx;
}

56. --y;
dy -= TwoAsquared;
d+= Asquared - dy;
}
}
voidNew()
{
hidemouseptr();
structure();
showmouseptr();
}
voidOpen()
{
inti;
char st[13];
setcolor(15);
hidemouseptr();
save(220,200,420,280,"c:/temp.tmp");
setfillstyle(SOLID_FILL,15);
bar(220,200,420,280);
setfillstyle(SOLID_FILL,8);
bar(221,201,419,216);
settextstyle(SMALL_FONT,HORIZ_DIR,5);

57. outtextxy(222,201,"OPEN");
settextstyle(SMALL_FONT,HORIZ_DIR,4);
setcolor(8);
outtextxy(222,230," Enterthe File Name");
w=textwidth("a");
h=textheight("a");
bar(221,263,419,279);
setcolor(15);
outtextxy(320-(3*w),265,"<OK>");
setcolor(8);
for(i=0;st[i-1]!='n';i++)
{
st[i]=getch();
if(st[i]==13||i>11)
{
st[i]='0';
break;
}
else if(st[i]==27)
{
goto Down;
}

58. st[i+1]='0';
outtextxy(320-(6*w),245,st);
}
if(restore(36,41,599,449,st)==0)
{
setfillstyle(SOLID_FILL,15);
bar(220,200,420,280);
setfillstyle(SOLID_FILL,8);
bar(221,201,419,216);
settextstyle(SMALL_FONT,HORIZ_DIR,5);
setcolor(15);
outtextxy(222,201,"ERROR!");
settextstyle(SMALL_FONT,HORIZ_DIR,4);
setcolor(8);
outtextxy(265,239,"IncorrectFile Name!");
bar(221,263,419,279);
setcolor(15);
getch();
Down:
restore(220,200,420,280,"c:/temp.tmp");
}
remove("c:/temp.tmp");

59. showmouseptr();
setcolor(fg);
}
voidAbout()
{
inti,w,col;
char st[13];
setcolor(15);
hidemouseptr();
save(200,195,435,285,"c:/temp.tmp");
setcolor(8);
for(i=0;i<180;i++)
{
circle(320,240,i);
delay(5);
}
setcolor(15);
outtextxy(200,300,"KONERULAKSHMAIAHCOLLEGE OF ENGINEERING");
outtextxy(250,160,"CREATERSANDDEVELOPERS");
outtextxy(290,200,"SREEKANTH");
outtextxy(290,220,"SANTOSH");

60. outtextxy(290,240,"SURESH");
flushall();
getch();
setfillstyle(1,16);
// restore(100,100,500,400,"c:/temp.tmp");
bar(50,50,500,430);
remove("c:/temp.tmp");
showmouseptr();
setcolor(fg);
}
voidSave()
{
inti,flag=0;
char st[13];
setcolor(15);
hidemouseptr();
save(220,200,420,280,"c:/temp.tmp");
setfillstyle(SOLID_FILL,15);
bar(220,200,420,280);

61. setfillstyle(SOLID_FILL,8);
bar(221,201,419,216);
settextstyle(SMALL_FONT,HORIZ_DIR,5);
outtextxy(222,201,"SAVE");
settextstyle(SMALL_FONT,HORIZ_DIR,4);
setcolor(8);
outtextxy(222,230," Enterthe File Name");
w=textwidth("a");
h=textheight("a");
bar(221,263,419,279);
setcolor(15);
outtextxy(320-(3*w),265,"<OK>");
setcolor(8);
for(i=0;st[i-1]!='n';i++)
{
st[i]=getch();
if(st[i]==13||i>11)
{
st[i]='0';
flag=1;
break;
}
else if(st[i]==27)
{

62. goto Down;
}
st[i+1]='0';
outtextxy(320-(6*w),245,st);
}
Down:
restore(220,200,420,280,"c:/temp.tmp");
if(flag==1)
{
save(36,41,599,449,st);
}
showmouseptr();
setcolor(fg);
}
voidsave(intx1,inty1,intx2,inty2,charname[13])
{
int i,j;
char ch;
FILE *fp;
x=x2;
y=y2;

63. fp=fopen(name,"wb");
if(fp!=NULL)
{
for(i=x1;i<=x2;i++)
for(j=y1;j<=y2;j++)
{
ch=getpixel(i,j);
fputc(ch,fp);
}
fclose(fp);
}
}
intrestore(intx1,inty1,intx2,inty2,charname[13])
{
char ch;
int i,j;
FILE *fp;
fp=fopen(name,"rb");
if(fp!='0')
{
for(i=x1;i<=x2;i++)
for(j=y1;j<=y2;j++)
{

64. ch=fgetc(fp);
putpixel(i,j,ch);
}
fclose(fp);
return1;
}
else
return0;
}
voidclearline()
{
inti,j;
setcolor(8);
//for(i=457;i<=470;i++)
//line(35,i,450,i);
for(i=35;i<=450;i++)
for(j=457;j<=470;j++)
putpixel(i,j,8);
}