give me an example of c++ vector in stack and heap .
Sure, here's an example of using a C++ vector in both the stack and heap:

```
#include <iostream>
#include <vector>

using namespace std;

int main() {
    // Example of using a vector in the stack
    vector<int> stackVector = {1, 2, 3, 4, 5};
    for (int i = 0; i < stackVector.size(); i++) {
        cout << stackVector[i] << " ";
    }
    cout << endl;

    // Example of using a vector in the heap
    vector<int>* heapVector = new vector<int>{6, 7, 8, 9, 10};
    for (int i = 0; i < heapVector->size(); i++) {
        cout << (*heapVector)[i] << " ";
    }
    cout << endl;

    // Don't forget to delete the heap-allocated vector
    delete heapVector;

    return 0;
}
```

In this example, we first create a vector called `stackVector` on the stack and initialize it with some values. We then loop through the vector and print out each element.

Next, we create a vector called `heapVector` on the heap using the `new` operator and initialize it with some values. We then loop through the vector and print out each element.

Finally, we delete the heap-allocated vector using the `delete` operator to free up the memory it was using.

Note that when using a vector on the heap, we need to use a pointer to the vector and dereference it using the `*` operator to access its elements.
that's good, make them with smart pointer
Sure, here's an example of using a C++ vector with smart pointers in both the stack and heap:

```
#include <iostream>
#include <vector>
#include <memory>

using namespace std;

int main() {
    // Example of using a vector with smart pointers in the stack
    vector<unique_ptr<int>> stackVector;
    stackVector.push_back(make_unique<int>(1));
    stackVector.push_back(make_unique<int>(2));
    stackVector.push_back(make_unique<int>(3));
    for (int i = 0; i < stackVector.size(); i++) {
        cout << *stackVector[i] << " ";
    }
    cout << endl;

    // Example of using a vector with smart pointers in the heap
    vector<unique_ptr<int>>* heapVector = new vector<unique_ptr<int>>();
    heapVector->push_back(make_unique<int>(4));
    heapVector->push_back(make_unique<int>(5));
    heapVector->push_back(make_unique<int>(6));
    for (int i = 0; i < heapVector->size(); i++) {
        cout << *(*heapVector)[i] << " ";
    }
    cout << endl;

    // Don't forget to delete the heap-allocated vector
    delete heapVector;

    return 0;
}
```

In this example, we first create a vector called `stackVector` on the stack using `unique_ptr` smart pointers to manage the memory of the vector's elements. We then add some elements to the vector using the `make_unique` function and loop through the vector to print out each element.

Next, we create a vector called `heapVector` on the heap using a pointer to a vector of `unique_ptr` smart pointers. We then add some elements to the vector using the `make_unique` function and loop through the vector to print out each element.

Finally, we delete the heap-allocated vector using the `delete` operator to free up the memory it was using.

Note that when using a vector with smart pointers, we don't need to manually manage the memory of the vector's elements. The `unique_ptr` smart pointers will automatically delete the elements when they go out of scope.
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