binary_search.cpp

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cout<<"Enter how many numbers :";
    cin>>n;
    vector<int>arr(n);
    for(int i=0;i<n;i++)
    {
        cin>>arr[i];
    }
    sort(arr.begin(),arr.end());
    for(int x:arr){cout<<x<<" ";}
    cout<<endl;
    int a;
    cout<<"Enter which value to check:";
    cin>>a;
    int low=0,high=n-1;
    bool found=false;
    while(low<=high)
    {
        int mid=(low+high)/2;
        if(arr[mid]==a)
        {
            cout<<"The positon is of "<<a<<"is :"<<mid;
            found=true;
            break;
        }
        else if(arr[mid]<=a)
        {
            low=mid+1;
        }
        else
        {
            high=mid-1;
        }
    }
    if(!found)
    {
        cout<<"Not Found";
    }
}