CGA

1.Displays a pixel specified by coordinate locations.(Putpixel())

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

int main()

{

int gd,gm;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

putpixel(100,200,WHITE);

getch();

closegraph();

return 0;

}

2.Draws a line from a point (x1,y1) to (x2,y2).(line())

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

int main()

{

int gd,gm;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

line(100,100,200,200);

getch();

closegraph();

return 0;

}

3.draws a circle with center at (x, y) and given radius.(circle())

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

int main()

{

int gd,gm;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

circle(100,100,50);

getch();

closegraph();

return 0;

}

4. rectangle()

#include<iostream.h>

#include<conio.h>

#include<dos.h>

#include<graphics.h>

void main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

int left = 150, top = 150;

int right = 450, bottom = 450;

rectangle(left, top, right, bottom); 

getch();

}

5. arc()

#include<iostream.h>

#include<conio.h>

#include<dos.h>

#include<graphics.h>

void main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

arc(100,100,0,180,50);

getch();

} 

6. ellipse()

#include<iostream.h>

#include<conio.h>

#include<dos.h>

#include<graphics.h>

void main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

ellipse(200,200,0,360,150,50);

getch();

} 

7. drawpoly()

#include<iostream.h>

#include<conio.h>

#include<dos.h>

#include<graphics.h>

void main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

int arr[] = {320, 150, 400, 250, 250,350, 320, 150};

        drawpoly(4, arr);

getch();

}

8. setcolor() 

#include<iostream.h>

#include<conio.h>

#include<dos.h>

#include<graphics.h>

void main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

setcolor(RED);

circle(100,100,50);

getch();

}

9. floodfill()

#include<iostream.h>

#include<conio.h>

#include<dos.h>

#include<graphics.h>

void main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

circle(100,100,50);

floodfill(100,100,WHITE);

getch();

}

10. setfillstyle()

EMPTY_FILL, SOLID_FILL, LINE_FILL, LTSLASH_FILL, SLASH_FILL, BKSLASH_FILL, LTBKSLASH_FILL, HATCH_FILL, XHATCH_FILL, INTERLEAVE_FILL, WIDE_DOT_FILL, CLOSE_DOT_FILL, USER_FILL

#include<iostream.h>

#include<conio.h>

#include<dos.h>

#include<graphics.h>

void main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

setfillstyle(SOLID_FILL,RED); 

circle(100,100,50);

floodfill(100,100,WHITE);

getch();

} 

11. outtextxy() 

#include<iostream.h>

#include<conio.h>

#iclude<dos.h>

#include<graphics.h>

void main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

outtextxy(100,100,"Hello World");

getch();

}

12. settextstyle()

DEFAULT_FONT, TRIPLEX_FONT, SMALL_FONT, SANS_SERIF_FONT, GOTHIC_FONT, SCRIPT_FONT, SIMPLEX_FONT, TRIPLEX_SCR_FONT, COMPLEX_FONT, EUROPEAN_FONT, BOLD_FONT

#include<iostream.h>

#include<conio.h>

#include<dos.h>

#include<graphics.h>

void main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

settextstyle(TRIPLEX_FONT,VERT_DIR,3);

outtextxy(100,100,"Hello World");

getch();

}

13. cleardevice()

#include<iostream.h>

#include<conio.h>

#include<dos.h>

#include<graphics.h>

void main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

line(100,100,200,200);

getch();

cleardevice();

circle(100,100,50);

getch();

}

14. delay()

#include<iostream.h>

#include<conio.h>

#include<dos.h>

#include<graphics.h>

void main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

line(100,100,200,200);

delay();

circle(100,100,50);

getch();

}

b. Draw a co-ordinate axis at the center of the screen.

#include<iostream.h>

#include<conio.h>

#include<dos.h>

#include<graphics.h>

void main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

a=getmaxx();

b=getmaxy();

line(0,b/2,a,b/2);

line(a/2,0,a/2,b);

getch();

}

                                                            Practical No 2 

Draw the following basic shapes in the center of the screen : i. Circle ii. Rectangle iii. Square iv. Concentric Circles v. Ellipse vi. Line 

i. Circle 

Code:

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

int main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

a=getmaxx();

b=getmaxy();

line(0,b/2,a,b/2);

line(a/2,0,a/2,b);

circle(a/2,b/2,100);

getch();

}

ii. Rectangle

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

int main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

a=getmaxx();

b=getmaxy();

line(0,b/2,a,b/2);

line(a/2,0,a/2,b);

rectangle(a/2-100,b/2-50,a/2+100,b/2+50);

getch();

}

iii. Square

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

int main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

a=getmaxx();

b=getmaxy();

line(0,b/2,a,b/2);

line(a/2,0,a/2,b);

rectangle(a/2-100,b/2-100,a/2+100,b/2+100);

getch();

}

iv. Concentric Circles

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

int main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

a=getmaxx();

b=getmaxy();

line(0,b/2,a,b/2);

line(a/2,0,a/2,b);

circle(a/2,b/2,100);

circle(a/2,b/2,150);

circle(a/2,b/2,200);

getch();

}

V. ellipse

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

int main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

a=getmaxx();

b=getmaxy();

line(0,b/2,a,b/2);

line(a/2,0,a/2,b);

ellipse(a/2,b/2,0,360,100,50); 

getch();

}

vi. line

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

int main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

a=getmaxx();

b=getmaxy();

line(0,b/2,a,b/2);

line(a/2,0,a/2,b);

line(a/4,b/4,3*a/4,3*b/4); 

getch();

}

                                                            Practical no-3

a. Divide your screen into four region, draw circle, rectangle, ellipse and half ellipse in each region.

i. Divide your screen into four region, draw circle in each region.

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

int main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

a=getmaxx();

b=getmaxy();

line(0,b/2,a,b/2);

line(a/2,0,a/2,b);

circle(a/4,b/4,50);

        circle(3*a/4,3*b/4,50);

circle(3*a/4,b/4,50);

circle(a/4,3*b/4,50);

getch();

}

ii. Divide your screen into four region, draw ellipse in each region

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

void main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

a=getmaxx();

b=getmaxy();

line(0,b/2,a,b/2);

line(a/2,0,a/2,b);

ellipse(a/4,b/4,0,360,100,50);

ellipse(a/4,3*b/4,0,360,100,50);

ellipse(3*a/4,b/4,0,360,100,50);

ellipse(3*a/4,3*b/4,0,360,100,50);

getch();

}

iii. Divide your screen into four region, draw rectangle in each region.

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

void main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

a=getmaxx();

b=getmaxy();

line(0,b/2,a,b/2);

line(a/2,0,a/2,b);

rectangle(a/8,b/8,(3*a)/8,(3*b)/8);

rectangle((5*a)/8,b/8,(7*a)/8,(3*b)/8);

rectangle(a/8,(5*b)/8,(3*a)/8,(7*b)/8);

rectangle((5*a)/8,(5*b)/8,(7*a)/8,(7*b)/8);

getch();

}

iv. Divide your screen into four region, draw line in each region.

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

void main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

a=getmaxx();

b=getmaxy();

line(0,b/2,a,b/2);

line(a/2,0,a/2,b);

line(a/8,b/8,(3*a)/8,(3*b)/8);

line((5*a)/8,b/8, (7*a)/8,(3*b)/8);

line(a/8,(5*b)/8,(3*a)/8,(7*b)/8);

line((5*a)/8, (5*b)/8, (7*a)/8,(7*b)/8);

        getch();

}

a. Divide your screen into four region, draw circle, rectangle, ellipse and half ellipse in each region.

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

void main()

{

int gd,gm,a,b;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

a=getmaxx();

b=getmaxy();

line(0,b/2,a,b/2);

line(a/2,0,a/2,b);

circle(a/4,b/4,50);

outtextxy(a/4,b/4, "Circle");

rectangle((5*a)/8,b/8, (7*a)/8, (3*b)/8);

outtextxy(3*a/4,b/4, "Rectangle");

ellipse(a/4,3*b/4,0,360,100,50);

outtextxy(a/4,3*b/4, "Ellipse"); 

        ellipse(3*a/4,3*b/4,0,180,100,50);

outtextxy(3*a/4,3*b/4, "Half Ellipse");

getch();

}

b. Draw a simple hut on the screen

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

int main() 

{

    int gd,gm;

    detectgraph(&gd,&gm);

    initgraph(&gd,&gm, "C:\\TC\\BGI");

    int arr[]={150,50,250,150,50,150,150,50}; 

    drawpoly(4,arr);

    rectangle(50,150,250,300); 

    rectangle(100, 200, 200,300);

    circle (150,100,20); 

    rectangle (10,300,290,320);

}

                                                                      practical 4

a. Develop the program for DDA Line drawing algorithm.

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

#include<dos.h>

#include<math.h>

int main()

{

float x,y,x1,x2,y1,y2,dx,dy,step,xinc,yinc;

int i,gd,gm;

detectgraph(&gd,&gm);

initgraph(&gd,&gm, "C:\\TC\\BGI");

cout<<"enter the value of x1 and y1";

cin>>x1>>y1;

cout<<"enter the value of x2 and y2";

cin>>x2>>y2;


dx=abs(x2-x1);

dy=abs(y2-y1);


if(dx>=dy)

{

step=dx;

}

else

{

step=dy;

}

xinc=dx/step;

yinc=dy/step;

x=x1;

y=y1;

i=1;

while(i<=step)

{

putpixel(x,y,WHITE);

x=x+xinc;

y=y+yinc;

i=i+1;

delay(50);

}

getch();

closegraph();

}

b. Develop the program for Bresenham‘s Line drawing algorithm.

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

#include<dos.h>

#include<math.h>

int main()

{

float x,y,x1,x2,y1,y2,dx,dy,e;

int i,gd,gm;

detectgraph(&gd,&gm);

initgraph(&gd,&gm, "C:\\TC\\BGI");

cout<<"enter the value of x1 and y1";

cin>>x1>>y1;

cout<<"enter the value of x2 and y2";

cin>>x2>>y2;

dx=abs(x2-x1);

dy=abs(y2-y1);

x=x1;

y=y1;

e=2*dy-dx;

i=1;

do

{

putpixel(x,y,YELLOW);

delay(100);

while(e>=0)

{

y=y+1;

e=e-2*dx;

}

x=x+1;

e=e+2*dy;

i=i+1;

}

while(i<=dx);

getch();

}

                                                        Practical No-7

#include<graphics.h>

int main(){

initwindow (2000, 400, "Graphics using Dev-C++");

for(int i=0;i<2000;i++)

{

line (0, 180, 2000, 180);

rectangle(130+i,60, 240+i,100);

rectangle(80+i,100,290+i,160);

circle (130+i,160,20);

circle (240+i,160,20);

delay(10);

cleardevice();

}

getch();

return 0;

}

normal

#include<iostream.h>

#include<graphics.h>

#include<dos.h>

#include<conio.h>

void main()

{

int gd, gm;

clrscr();

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

outtextxy(200,100,"Welcome");

getch();

}

Aim: Write a program in C++ for move a ball.

Code:

#include<iostream.h>

#include<graphics.h>

#include<conio.h>

#include<dos.h>

void main()

{

int gd,gm,i=0,j=225;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"C:\\TC\\BGI");

if(i<100)

{

for(i;i<100;++i)

{

j--;

line(0,245,650,245);

circle(300,j,20);

delay(20);

cleardevice();

}}

if(i>=99)

{

for(i;i>=0;--i)

{

j++;

line(0,245,650,245);

circle(300,j,20);

delay(20);

cleardevice();

}

}

getch();

}

                                                                Practical-6

Aim: Write a program in c++ to translate a point

#include <iostream.h>

#include <conio.h>

#include <graphics.h>

void main() {

int gd, gm,x1,y1, tx, ty; detectgraph(&gd,&gm);

initgraph(&gd,&gm, "C:\\TC\\BGI");

cout<<"Enter the first co-ordinate:"; cin>>x1>>y1;

putpixel (x1,y1,WHITE);

cout<<"Enter the translation vector:"; cin>>tx>>ty;

x1=x1+tx;

y1=y1+ty;

putpixel(x1,y1, RED);

getch();

closegraph();

}

Aim: Write a program in c++ to translate a line. Code: #include #include #include void main() { int gd,gm; detectgraph(&gd,&gm); initgraph(&gd,&gm,"C:\\TC\\BGI"); int x1=100,x2=200,y1=100,y2=100,tx,ty; line(x1,y1,x2,y2); cout<<"Enter the translation vector:"; cin>>tx>>ty; setcolor(RED); x1=x1+tx; y1=y1+ty; x2=x2+tx; y2=y2+ty; line(x1,y1,x2,y2); getch(); closegraph(); }

Aim: Write a program in c++ to translate a triangle. Code: #include #include #include void main() { int gd,gm; detectgraph(&gd,&gm); initgraph(&gd,&gm,"C:\\TC\\BGI"); int x1=200,y1=100,x2=150,y2=200,x3=250,y3=200,tx,ty; line(x1,y1,x2,y2); line(x2,y2,x3,y3); line(x3,y3,x1,y1); cout<<"Enter the translation vector:"; cin>>tx>>ty; setcolor(RED); x1=x1+tx; y1=y1+ty; x2=x2+tx; y2=y2+ty; x3=x3+tx; y3=y3+ty; line(x1,y1,x2,y2); line(x2,y2,x3,y3); line(x3,y3,x1,y1); getch(); closegraph(); }

Aim: Write a program in c++ to translate a rectangle. Code: #include #include #include void main() { int gd,gm; detectgraph(&gd,&gm); initgraph(&gd,&gm,"C:\\TC\\BGI"); int x1=100,y1=100,x2=200,y2=100,x3=200,y3=200,x4=100,y4=200,tx,ty; line(x1,y1,x2,y2); line(x2,y2,x3,y3); line(x3,y3,x4,y4); line(x4,y4,x1,y1); cout<<"Enter the translation vector:"; cin>>tx>>ty; setcolor(RED); x1=x1+tx; y1=y1+ty; x2=x2+tx; y2=y2+ty; x3=x3+tx; y3=y3+ty; x4=x4+tx; y4=y4+ty; line(x1,y1,x2,y2); line(x2,y2,x3,y3); line(x3,y3,x4,y4); line(x4,y4,x1,y1); getch(); closegraph(); }

Aim: Write a program in c++ to scale the triangle. Code: #include #include #include void main() { int a,b,gd,gm; detectgraph(&gd,&gm); initgraph(&gd,&gm,"C:\\TC\\BGI"); int x1=200, y1=100, x2=300, y2=200, x3=100, y3=200; line(x1,y1,x2,y2); line(x2,y2,x3,y3); line(x3,y3,x1,y1); cout<<"ENTER SCALLING FACTORS :"; cin>>a>>b; x1= x1*a; x2= x2*a; x3= x3*a; y1= y1*b; y2= y2*b; y3= y3*b; line(x1,y1,x2,y2); line(x2,y2,x3,y3); line(x3,y3,x1,y1); getch(); }

Aim: Write a program in c++ to scale the rectangle. Code: #include #include #include void main() { int a,b,gd,gm; detectgraph(&gd,&gm); initgraph(&gd,&gm,"C:\\TC\\BGI"); int x1=100, y1=100, x2=300, y2=100, x3=300, y3=200, x4=100, y4=200; line(x1,y1,x2,y2); line(x2,y2,x3,y3); line(x3,y3,x4,y4); line(x4,y4,x1,y1); cout<<"ENTER SCALLING FACTORS (X,Y):\n"; cin>>a>>b; x1= x1*a; x2= x2*a; x3= x3*a; x4= x4*a; y1= y1*b; y2= y2*b; y3= y3*b; y4= y4*b; setcolor(RED); line(x1,y1,x2,y2); line(x2,y2,x3,y3); line(x3,y3,x4,y4); line(x4,y4,x1,y1); getch(); }

Aim: Write a program in c++ to rotate point. Code: #include #include #include #include void main() { int gd,gm; detectgraph(&gd,&gm); initgraph(&gd,&gm,"C:\\TC\\BGI"); int x1=200,y1=100; float a; putpixel(x1,y1,WHITE); cout<<"Enter the angle of rotation:"; cin>>a; a=(a*3.14)/180; setcolor(RED); x1=x1*cos(a)-y1*sin(a); y1=x1*sin(a)+y1*cos(a); putpixel(x1,y1,RED); getch(); closegraph(); }

Aim: Write a program in c++ to rotate line. #include #include #include #include void main() { int gd,gm; detectgraph(&gd,&gm); initgraph(&gd,&gm,"C://TC//BGI"); float a, x1=200, y1=100, x2=300, y2=200; line(x1,y1,x2,y2); cout<<"ENTER ANGLE OF ROTATION:\n"; cin>>a; a=(a*3.14)/180; x2=x2*cos(a)-y2*sin(a); y2=x2*sin(a)+y2*cos(a); setcolor(RED); line(x1,y1,x2,y2); getch(); }

Aim: Write a program in c++ to rotate a triangle. Code: #include #include #include #include void main() { int gd,gm; detectgraph(&gd,&gm); initgraph(&gd,&gm,"C://TC//BGI"); float a, x1=200, y1=100, x2=300, y2=200, x3=100, y3=200, x11, y11, x22, y22, x33, y33; line(x1,y1,x2,y2); line(x2,y2,x3,y3); line(x3,y3,x1,y1); cout<<"ENTER ANGLE OF ROTATION:\n"; cin>>a; a=(a*3.14)/180; x11=x1*cos(a)-y1*sin(a); y11=x1*sin(a)+y1*cos(a); x22=x2*cos(a)-y2*sin(a); y22=x2*sin(a)+y2*cos(a); x33=x3*cos(a)-y3*sin(a); y33=x3*sin(a)+y3*cos(a); setcolor(RED); line(x11,y11,x22,y22); line(x22,y22,x33,y33); line(x33,y33,x11,y11); getch(); }

Aim: Write a program in c++ to shear along x-axis and y-axis. Code: #include #include #include void main() { int gd=DETECT,gm; initgraph(&gd,&gm,"C:\\Tc\\BGI"); float x1=100,y1=100,x2=150,y2=100,x3=150,y3=200,x4=100,y4=200; float shy; line(x1,y1,x2,y2); line(x2,y2,x3,y3); line(x3,y3,x4,y4); line(x4,y4,x1,y1); cout<<"enter x-direction of shear : "; cin>>shy; x1=x1+shy*y1; x2=x2+shy*y2; x3=x3+shy*y3; x4=x4+shy*y4; setcolor(RED); line(x1,y1,x2,y2); line(x2,y2,x3,y3); line(x3,y3,x4,y4); line(x4,y4,x1,y1); getch(); closegraph(); }

Aim: Write a program in c++ to perform y shearing transformation. Code: #include #include #include void main() { int gd=DETECT,gm; initgraph(&gd,&gm,"C:\\Tc\\BGI"); float x1=100,y1=100,x2=150,y2=100,x3=150,y3=200,x4=100,y4=200; float shx; line(x1,y1,x2,y2); line(x2,y2,x3,y3); line(x3,y3,x4,y4); line(x4,y4,x1,y1); cout<<"enter y-direction of shear : "; cin>>shx; y1=y1+shx*x1; y2=y2+shx*x2; y3=y3+shx*x3; y4=y4+shx*x4; setcolor(RED); line(x1,y1,x2,y2); line(x2,y2,x3,y3); line(x3,y3,x4,y4); line(x4,y4,x1,y1); getch(); closegraph(); }

                                                                    practical 5

a. Develop the program for the mid-point circle drawing algorithm.

 #include<iostream>

int main()

{

int gd=DETECT,gm;

initgraph(&gd,&gm,(char*)"");

int xcen=getmaxx()/2;

int ycen=getmaxy()/2;

int r=50;

int d=1.25-r;

int x=0,y=r;

do

{

putpixel(xcen+x,ycen+y,WHITE);

putpixel(xcen+y,ycen+x,WHITE);

putpixel(xcen+y,ycen-x,WHITE);

putpixel(xcen+x,ycen-y,WHITE);

putpixel(xcen-x,ycen-y,WHITE);

putpixel(xcen-y,ycen-x,WHITE);

putpixel(xcen-y,ycen+x,WHITE);

putpixel(xcen-x,ycen+y,WHITE);

if(d<0)

{

d=d+2*x+3;

y=y;

}

else

{

d=d+2*(x-y)+5;

y=y-1;

}

x=x+1;

}

while(x<y);

getch();

}

b. Develop the program for Bresenhams’ method of Circle drawing

#include<iostream>

int main()

{

int gd=DETECT,gm;

initgraph(&gd,&gm,(char*)"");

int xcen=getmaxx()/2;

int ycen=getmaxy()/2;

int r=50;

int d=3-2*r;

int x=0,y=r;

do

{

putpixel(xcen+x,ycen+y,WHITE);

putpixel(xcen+y,ycen+x,WHITE);

putpixel(xcen+y,ycen-x,WHITE);

putpixel(xcen+x,ycen-y,WHITE);

putpixel(xcen-x,ycen-y,WHITE);

putpixel(xcen-y,ycen-x,WHITE);

putpixel(xcen-y,ycen+x,WHITE);

putpixel(xcen-x,ycen+y,WHITE);

if(d<0)

{

d=d+4*x+6;

}

else

{

d=d+4*(x-y)+10;

y=y-1;

}

x=x+1;

}

while(x<y);

getch();

}







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