Smart Pointers

Smart Pointers 2

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

int main(){
    shared_ptr<int> a(new int(4)); //correct

    {
         shared_ptr<int> b = a; //correct.
         std::cout<<*b<<std::endl; //correct.
    } 
    
    std::cout<<*a<<std::endl; //correct. 'a' still valid although 'b' went out of scope.
    return 0;
}