Implement line algorithm for all slopes using DDA algorithm

#include<stdio.h>

#include<conio.h>

#include<graphics.h>

#include<math.h>

#include<iostream.h>

void main()

{

int x1,y1,x2,y2,temp;

cout<<"\n ENTER X1,Y1=";

cin>>x1>>y1;

cout<<"\n ENTER X2,Y2=";

cin>>x2>>y2;

float dx,dy,Xinc,Yinc,x,y;

int gd=DETECT,gm;

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

if(x1>x2 || y1>y2)

{

temp=x1;

x1=x2;

x2=temp;

int temp1;

temp1=y1;

y1=y2;

y2=temp1;

}

dx=abs(x2-x1);

dy=abs(y2-y1);

if(dx>dy)

 {

  temp=dx;

 }

else

 {

  temp=dy;

 }

Xinc=dx/temp;

Yinc=dy/temp;

x=x1;

y=y1;

putpixel(x,y,3);

for(int i=1;i<=temp;i++)

{

x+=Xinc;

y+=Yinc;

putpixel((int)x,(int)y,3);

}

putpixel(x1,y1,15);

putpixel(x2,y2,15);

getch();

}