Computer Graphics Lab

#include < graphics.h >
#include < stdio.h >
#include < conio.h >
#include < math.h >

void main()
{

int gd=DETECT,gm=DETECT,s,dx,dy,m,x1,y1,x2,y2;
float xi,yi,x,y;

clrscr();

printf("Enter the sarting point x1 & y1n");
scanf("%d%d",&x1,&y1);

printf("Enter the end point x2 & y2n");
scanf("%d%d",&x2,&y2);

initgraph(&gd,&gm,"");
cleardevice();

dx=x2-x1;
dy=y2-y1;

if(abs(dx)>abs(dy))
s=abs(dx);
else
s=abs(dy);

xi=dx/(float)s;
yi=dy/(float)s;

x=x1;
y=y1;

putpixel(x1+0.5,y1+0.5,4);

for(m=0; m << s; m++)
{
x+=xi;
y+=yi;
putpixel(x+0.5,y+0.5,4);
}
getch();
}

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