C Program for Bresenham Line Drawing Algorithm [Turbo C++ Version]

#include<stdio.h>

#include<conio.h>

#include<graphics.h>

void drawline(int x0, int y0, int x1, int y1)

{

    int dx, dy, p, x, y;

    dx=x1-x0;

    dy=y1-y0;

    x=x0;

    y=y0;

    p=2*dy-dx;

    while(x<x1||y<y1)

    {

if(p>=0)

{

    putpixel(x,y,7);

    y=y+1;

    p=p+2*dy-2*dx;

    delay(100);

}

else

{

    putpixel(x,y,7);

    p=p+2*dy;

    x=x+1;

    delay(100);

}

    }

}

void main()

{

    int gd=DETECT, gm, x0, y0, x1, y1;

    initgraph(&gd,&gm,"c:\\turboc3\\bgi");

    printf("Enter co-ordinates of first point: ");

    scanf("%d%d", &x0, &y0);

    printf("Enter co-ordinates of second point: ");

    scanf("%d%d", &x1, &y1);

    drawline(x0, y0, x1, y1);

    closegraph();

    getch();

}

Output:-