Line Drawing Using Bresenham’s Algorithm in c program | CS1355-Graphics & Multimedia Lab

Normal you can draw line using line function. But in these Bresenhams without using line function. It will draw the line. it will draw the line using the pixel coordinates by thorough increasing down and right direction of the pixel in the centers to the integer coordinates. See SOURCE CODE
#include”stdio.h”

Source code | programming

#include<stdio.h>
#include<conio.h>
#include<graphics.h>
void main()
{
int gd=DETECT,gm,x,y,x1,x2,x3,y1,y2,y3,p,i;
clrscr();
initgraph(&gd,&gm,"quot;"quot;);
gotoxy(12,2);
printf("quot;Line Breshams algorithm\n"quot;);
gotoxy(12,3);
printf("quot;----------------------------------------"quot;);
printf("quot;\nenter the left co ordinates\n"quot;);
printf("quot;x1="quot;);
scanf("quot;%d"quot;,&x1);
printf("quot;\ny1= "quot;);
scanf("quot;%d"quot;,&y1);
printf("quot;Enter the right co ordinates\n"quot;);
printf("quot;x2= "quot;);
scanf("quot;%d"quot;,&x2);
printf("quot;\ny2= "quot;);
scanf("quot;%d"quot;,&y2);
if(x1>x2)
{
x=x2;
y=y2;
x3=x1-x2;
y3=y1-y2;
}
else
{
x=x1;
y=y1;
x3=x2-x1;
y3=y2-y1;
}
p=2*y3-x3;
cleardevice();
putpixel(x,y,1);
for(i=0;i<=x3;i++)
{
if(p<0)
{
x++;
p=p+2+y3;
}
else
{
x++;
y++;
p=p+2*(y3-x3);
}
putpixel(x,y,1);
}
getch();
gotoxy(12,2);
printf("quot;\nACTUAL LINE"quot;);
gotoxy(12,3);
printf("quot;\n--------------------------------------"quot;);
getch();
}

OUTPUT

Line Bresehams Algorithm
Enter the left co-ordinates
X1 = 100
Y1 = 100
Enter the right co-ordinates
X2 =200
Y2=200
ACTUAL LINE