Flood Fill Algorithm Using C

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

void flood(int,int,int);

void main()
{

int gd=DETECT,gm;
int ch,x,y,bc,fc;
initgraph(&gd,&gm,"c:\\tc\\bgi");
cleardevice();
printf("Enter boundry color:");
scanf("%d",&bc);
setcolor(bc);
rectangle(250,200,300,250);
x=280;
y=240;
flood(x,y,bc);
getch();
closegraph();
}
void flood(int x,int y,int bc)
{
if(getpixel(x,y)!=bc)
{
putpixel(x,y,bc);
flood(x+1,y,bc);
flood(x,y+1,bc);
flood(x-1,y,bc);
flood(x,y-1,bc);
}
}

Tower Of Hanoi Using Backtracking in c++

#include<iostream.h>

#include<conio.h> 

void tower(int,char,char,char); 

void main()

{

int n; 

clrscr();

cout<<"enter the disk number :  ";

cin>>n;tower(n,'A','C','B'); 

getch();

} 

void tower(int n,char from,char to,char aux)

{

if(n==1)
    {

    cout<<endl<<"move 1 from peg "<<from<<" to "<<to;return;

   }

tower(n-1,from,aux,to);

cout<<endl<<"move "<<n<<" from peg "<<from<<" to "<<to;

tower(n-1,aux,to,from);

}

Draw Arc Using C

#include<conio.h>
#include<graphics.h>
#include<stdio.h>
#include<dos.h>
void main()
{
        int gd=DETECT,gm=0;
initgraph(&gd,&gm,"c:\\tc\\bgi");
       arc(110, 110, 0, 145, 55);
       /*
       arc(a,b,c,d,e);
       a= x
       b=y
       c=start angle
       d= end angle
       e=radius of arc.
       */
       getch();
       closegraph();
}

Draw Rectangle Using C

#include<conio.h>
#include<graphics.h>
#include<stdio.h>
void main()
{
int gd=DETECT,gm=0;
initgraph(&gd,&gm,"c:\\tc\\bgi");
cleardevice();
     int midx,midy,x,y;
     x=getmaxx();
     y=getmaxy();
     midx=x/2;
     midy=y/2;
     rectangle(midx-110,midy-110,midx+110,midy+110);
     getch();
     closegraph();
}

Draw Circle Using C

#include<conio.h>
#include<graphics.h>
#include<stdio.h>
void main()
{
int gd=DETECT,gm;
initgraph(&gd,&gm,"c:\\tc\\bgi");
cleardevice();
        gm=0;
        circle(250,250,100);
       /*  circle(a,b,c);
      a=X axis element
      b=Y axis element
      c=radius
       */
       getch();
       closegraph();
}

Horizontal Line And Vertical Line of Center Of Screen Using C

#include<conio.h>
#include<graphics.h>
#include<stdio.h>
void main()
{
int gd=DETECT,gm,maxx,maxy,midx,midy;
initgraph(&gd,&gm,"c:\\tc\\bgi");
cleardevice();
        maxx=getmaxx();
        maxy=getmaxy();
        midx=maxx/2;
        midy=maxy/2;
        line(0,midy,midx,maxy);
        line(midx,0,midx,maxy);
getch();
closegraph();
}


////////////////////////////OUTPUT//////////////////////////////

Midpoint Circle Drawing Algorithm Using C

#include<conio.h>
#include<graphics.h>
#include<stdio.h>
#include<dos.h>
void main()
{
int gd=DETECT,gm,xc,yc,r,x,y,p;
initgraph(&gd,&gm,"c:\\tc\\bgi");
cleardevice();
printf("Enter xc and yc:");
scanf("%d%d",&xc,&yc);
printf("Enter radius:");
scanf("%d",&r);
x=0;
y=r;
p=1.25-r;
do
{
putpixel(xc+x,yc+y,1);
putpixel(xc+y,yc+x,2);
putpixel(xc-x,yc+y,1);
putpixel(xc+y,yc-x,2);
putpixel(xc-y,yc-x,1);
putpixel(xc-x,yc-y,2);
putpixel(xc+x,yc-y,1);
putpixel(xc-y,yc+x,2);
if(p<0)
{
                        p=p+(2*x)+1;
}
else
{
        p=p+(2*x)+1-(2*y);
y=y-1;
}
x=x+1;
}
while(x<y)
       putpixel(xc+x,yc+y,2);
getch();
closegraph();
}