binary.cpp

#include<iostream.h>
#include<conio.h>
void search(int a[], int beg, int end, int item)    // Function to Search Element  
{
if(beg==end)                                     // if Single Element is in the List 
{
if(item==a[beg])
cout<<"\nThe Element is Found at Position : "<<beg;
else
cout<<"\nData is Not Found";
}

else
{
int mid = (beg + end)/2;
if(item == a[mid])
cout<<"\nThe Element is Found at Position : "<<mid;

else if(item < a[mid])
search(a,beg,mid-1,item);                 // Function Calls Itself (Recursion)  

else
search(a,mid+1,end,item);                 // Function Calls Itself (Recursion)  
}

}

void main()
{
clrscr();
int a[100],item,n,beg,end,mid,loc;
cout<<"\n------- Binary Search using Recursion -------\n\n";
cout<<"Enter the number of Elements : ";
cin>>n;

cout<<"\nEnter the elements :\n";
for(loc=1;loc<=n;loc++)
{
cin>>a[loc];
}
cout<<"\nEnter the Element to be searched : ";
cin>>item;

beg=1;
end=n;

search(a,beg,end,item);          // Function Call in Main  Function 
getch();
}