[RESOLVED] Using Lambdas to search a std::vector for an object ... (Help)

I'm trying to understand Lambda expressions.
And I guess it's true that teaching an old dog new tricks is tricky.
I've inserted a code sample below; what I'm looking for is a lambda expression/statement that searches myVector for an element in
the vector that has an integer (endpoint) with a specified value.
I'd like the code to simply print out the position of the element in the vector where the endpoints' value matches the expression.

Code:

---

#include <algorithm>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <memory>

using namespace std;

/*
 *
 */
int
main (int argc, char** argv)
{

    typedef struct mystruct
    {
        int endpoint;

        mystruct (int a)
        {
            endpoint = a;
        }
    } MyStruct;

    std::vector<std::unique_ptr < MyStruct>> myVector;

    for ( int i = 0; i < 5; i++ )
        myVector.emplace_back(new MyStruct (i*i));

    // Lambda expression here to search myVector for instance where endpoint = 9;
    // and print the position of that element in the vector.
    // Output should obviously be 3;

    return 0;
}

---

Perhaps you could consider something like this, compiling with respect to C++14 or later:

Code:

---

#include <algorithm>
#include <iostream>
#include <memory>
#include <vector>

struct MyStruct
{
    int endpoint;

    explicit MyStruct(int a) : endpoint(a) {}
};

int main()
{
    std::vector<std::unique_ptr<MyStruct>> myVector;

    for (int i = 0; i < 5; ++i)
    {
        myVector.emplace_back(new MyStruct(i * i));
    }

    // Lambda expression here to search myVector for instance where endpoint = 9;
    // and print the position of that element in the vector.
    // Output should obviously be 3;
    auto result = find_if(myVector.begin(), myVector.end(),
                          [](const auto& x){ return x->endpoint == 9; });
    if (result != myVector.end())
    {
        std::cout << "Found: " << (*result)->endpoint
                  << " @ index " << (result - myVector.begin()) << std::endl;
    }
    else
    {
        std::cout << "Not Found" << std::endl;
    }

    return 0;
}

---

Hey Laserlight.... I sincerely appreciate your kind response. I learn by example and that one is one of the best. I always like to repay the kindness of others when it comes to things like this. If you have a PayPal account I'd like to send you $20 USD for your trouble.