insert array new

#include<bits/stdc++.h>
using namespace std;
int a[100];
int main()
{
    int n,j,i,x,item;
    cin>>n;
    vector<int>ar;
    for(i=0;i<n;i++)
    {
        cin>>x;
        ar.push_back(x);
    }
    cout <<"enter position";
    cin>>j;
    cout<<"enter item";
    cin>>item;
    for(i=j;i<=n;i++)
    {
        a[i+1]=ar[i];
        a[j]=item;
    }
    for(i=0;i<j;i++)
    {
        a[i]=ar[i];

    }
    for(i=0;i<n;i++)
    {
        cout<<a[i]<<" ";
    }
    return 0;
    }