#include<graphics.h>

#include<stdio.h>

#include<conio.h>

#include<math.h>

int main()
{
   
    int xstart,ystart,xend,yend,dx,dy,steps,i,xtemp,ytemp;
    float x,y,xinc,yinc;
    int gdriver = DETECT, gmode;
   
   
    clrscr();
    printf("Enter the X value of Start Point  : ");
    scanf("%d",&xstart);
    printf("Enter the Y value of Start Point  : ");
    scanf("%d",&ystart);
    printf("Enter the X value of End Point  : ");
    scanf("%d",&xend);
    printf("Enter the Y value of End Point  : ");
    scanf("%d",¥d);
   
   
    dx = xend-xstart;
    dy = yend-ystart;
   
    if(dx>dy)
    {
        steps = dx;
    }
    else
    {
        steps = dy;
    }
    xinc = dx/(float)steps;
    yinc = dy/(float)steps;
   
    printf("Value of Start Point is (%d,%d) ",xstart,ystart);
    printf("\nValue of End Point is (%d,%d) ",xend,yend);
    printf("\nValue of Step is  %d ",steps);
    printf("\nValue of X incement is %.2f ",xinc);
    printf("\nValue of Y incement is %.2f ",yinc);
    getch();
    x=xstart;
    y=ystart;
   
    clrscr();
    
    initgraph(&gdriver, &gmode, "c:\\tc\\bgi");

    printf("\nValue of Point 1 is (%d,%d) ",xstart,ystart);
    
    for(i=1;i<=steps;i++)
    {
        x=x+xinc;
        y=y+yinc;
       
        xtemp = x;
        ytemp = y;
        if((x-xtemp)>0.5)
        {
            xtemp++;
        }
        if((y-ytemp)>0.5)
        {
            ytemp++;
        }
        putpixel(xtemp,ytemp,4);
        printf("\nValue of Point %d is (%d,%d) ",(i+1),xtemp,ytemp);
    }
    getch();
    closegraph();
    return 0;
}