#includeIn the above example, we create a shared pointer to an instance of a Data structure. Then, the add_deleter function is used to attach a conditional function to delete the pointer data if it's value is greater than 50. The Boost library is a package library for C++. It is an open-source library and can be downloaded from its official website.#include #include using namespace boost; struct Data { int value; Data(int val) : value(val) {} }; int main() { shared_ptr p = make_shared(42); // Create a shared pointer using make_shared() // Add the conditional function to delete pointer data if it's value is > 50 p->add_deleter([](Data* d) { if (d->value > 50) delete d; }); return 0; }