#include <iostream>
#include <vector>
using namespace std;

bool member_of(int x, vector<int> v);
void test(const int value, const vector<int> vec);

int main()
{
    vector<int> vec;
    vec.push_back(30);
    vec.push_back(10);
    vec.push_back(50);
    vec.push_back(80);
    vec.push_back(60);
    vec.push_back(12);
    vec.push_back(40);
    vec.push_back(20);
    vec.push_back(70);

    cout << "The vector: ";

    for (int i : vec)
    {
        cout << i << " ";
    }
    cout << endl << endl;

    test(50, vec);
    test(65, vec);
    test(80, vec);
    test(47, vec);
}

void test(const int value, const vector<int> vec)
{
    cout << value << " is";
    bool found = member_of(value, vec);

    if (!found) cout << " not";
    cout << " in the vector." << endl;
}

bool member_of(int x, vector<int> v)
{
    // Complete as a recursive function.

	return false;
}