Distance Function in STL

#include<bits/stdc++.h>

using namespace std;

int main()

{

    vector<int>v;

    v.push_back(1);

    v.push_back(2);

    v.push_back(3);

    v.push_back(4);

    v.push_back(5);

    v.push_back(6);

    v.push_back(7);

    v.push_back(8);

    v.push_back(9);

    v.push_back(10);

    int s = distance(v.begin(), v.end());

    cout << "Size of Vector :: " << s << "\n";

    auto it = find(v.begin(), v.end(), 7);

    if(it != v.end())

    {

        int dst = distance(v.begin(), it);

        cout << "\nDistance :: " << dst << "\n";

    }

    else

cout << "\n7 Not Found." << "\n";

    return 0;

}