//BRESENHAM LINE DRAWING
#include<stdio.h>
#include<graphics.h>
#include<math.h>
main()
{
float x,y,x1,y1,x2,y2,dx,dy,e;
int i,gd,gm;
clrscr();
printf("Enter the value of x1 :\t");
scanf("%f",&x1);
printf("Enter the value of y1 :\t");
scanf("%f",&y1);
printf("Enter the value of x2 :\t");
scanf("%f",&x2);
printf("Enter the value of y2 :\t");
scanf("%f",&y2);
detectgraph(&gd,&gm);
initgraph(&gd,&gm,"");
dx=abs(x2-x1);
dy=abs(y2-y1);
x = x1;
y = y1;
e = 2 * dy-dx;
i = 1;
do
{
putpixel(x,y,15);
while(e >= 0)
{
y = y + 1;
e = e - 2 * dx;
}
x = x + 1;
e = e + 2 * dy;
i = i + 1;
}
while( i <= dx);
getch();
closegraph();
}
SAMPLE OUTPUT:
