C Program for Binary Search

/*Binary Search*/
#include<iostream.h>
#include<conio.h>
int x[20],s;
int search(int lb,int ub)
{
  int mid;
  if(ub<lb)return 0;
  mid=(lb+ub)/2;
  if(s==x[mid])return mid;
  else if(s<x[mid])search(lb,mid-1);
  else search(mid+1,ub);
}
void main()
{
 int i,j;
 cout<<"Enter Size";
 cin>>j;
 cout<<"Enter element";
 for(i=1;i<=j;i++)
 cin>>x[i];
 cout<<"Enter Element";
 cin>>s;
 cout<<"Position"<<search(1,j);
 getch();
}