cpp29 wap to find a no. from an array

#include <iostream>

using namespace std;

int linearsearch(int array[],int n,int key){
    for(int i=0;i<n;i++){
        if(array[i]==key){
        return i;
        }
    }
    return -1;
}

int main()
{
    int n;
    cin>>n;
    int array[n];
    for(int i=0;i<n;i++){
        cin>>array[i];
    }
    int key;
    cin>>key;
    cout<<linearsearch(array,n,key)<<" ";

    return 0;
}