Ex. No: 1Date:DDA ALGORITHM FOR DRAWING LINEProgram:

#include

#include

#include

#include

#include

#include

void draw(int x1,int y1,int x2,int y2);

int main(void)

{

int x1,y1,x2,y2;

int gdriver=DETECT,gmode,gerror;

printf("\n Enter the x and y value for starting point:\n");

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

printf("\n Enter the x and y value for ending point:\n");

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

clrscr();

initgraph(&gdriver,&gmode,"E:\\TC\\BGI\\");

draw(x1,y1,x2,y2);

getch();

return 0;

}

void draw(int x1,int y1,int x2,int y2)

{

float x,y,xinc,yinc,dx,dy;

int k,step;

dx=x2-x1;

dy=y2-y1;

if(abs(dx)>abs(dy))

step=abs(dx);

else

step=abs(dy);

xinc=dx/step;

yinc=dy/step;

x=x1;

y=y1;

putpixel(abs(x),abs(y),111);

for(k=1;k