2nd vedio of STL

#1

#include
#include<bits/stdc++.h>
#include
using namespace std;

int main()
{
int arr[]={1,10,11,9,100};
int n= sizeof(arr)/sizeof(int);

int key;
cin>>key;
auto it=(arr,arr+n,key);
cout<<it<<endl;
int index= it - arr;
if(index==n)
cout<<key<<"not present";
else
cout<<"present at address"<<index;
return 0;

}
//GETTING ERROR WITH THE CODE AND THE ERROR IS:

invalid operands of types ‘int’ and ‘int [5]’ to binary ‘operator-’
int index= it - arr;
~^~~

//HELP ME TO FIX

#2

Hi @hrit04,
in dis
auto it=(arr,arr+n,key);
u r not using any predefined function like lower_bound, upper_bound thats why its giving error when u r doing it-arr.
try using auto it=lower_bound(arr,arr+n,key);
ur code will work.
Hope dis helps.

#3

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