A PROGRAM TO DRAW A LINE USING BRESENHAM’S ALGORITHM

#include<stdio.h>

#include<conio.h>

#include<graphics.h>

void main()

{

clrscr();

int gd , gm , dx, dy, x,y,p,x1,y1,x2,y2 ;

printf("\n\n\t Enter the coordinates of first point:");

scanf("%d%d",&x1,&y1);

printf("\n\n\t Enter the coordinates of second point:");

scanf("%d%d",&x2,&y2);

dx=(x2-x1);

dy=(y2-y1);

p= 2*(dy)-(dx);

x=x1;

y=y1;

detectgraph(&gd,&gm);

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

putpixel(x,y,WHITE);

while(x<=x2)

{

if(p<0)

{

x=x+1;

y=y+1;

p=p+2*(dy);

}

else

{

x=x+1;

y=y+1;

p=p+2*(dy-dx);

}

putpixel(x,y,WHITE);

}

getch();

closegraph();

}

 

                   OUTPUT

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