#include boostmake_sharedhpp

The boost/make_shared.hpp header provides the boost::make_shared function template, which is an extension to the standard std::make_shared function.

boost::make_shared creates a shared pointer to a newly created object of the specified type with the specified constructor arguments, and returns the shared pointer. This function is more efficient than creating the object and then creating the shared pointer separately, because it allocates the memory for the object and the control block in one operation.

Here's an example of using boost::make_shared:

#include <boost/make_shared.hpp>
#include <iostream>
#include <string>

int main() {
    auto str_ptr = boost::make_shared<std::string>("Hello, world!");
    std::cout << *str_ptr << std::endl;
    return 0;
}

This creates a shared pointer to a std::string object that contains the string "Hello, world!", and then prints the string to the console