🔴 Advanced · Lesson 61

Smart Pointers

What is Smart Pointers?

Smart Pointers
Smart pointers manage dynamic memory automatically and reduce memory leaks. Common smart pointers are unique_ptr and shared_ptr.

Level
🔴 STL, Modern C++ and Projects

Example File
smart-pointers.cpp

Main Focus
Concept + syntax + practical C++ program

Why should you learn this?

It helps you write correct and readable C++ programs.
It is used repeatedly in school practicals, projects and competitive programming.
It builds the base for advanced topics such as OOP, STL and data structures.

Important Terms

Term	Meaning / Use
unique_ptr	Unique_ptr used in Smart Pointers programming.
shared_ptr	Shared_ptr used in Smart Pointers programming.
memory management	Memory management used in Smart Pointers programming.
RAII	Raii used in Smart Pointers programming.
ownership	Ownership used in Smart Pointers programming.

Syntax / Pattern

unique_ptr<int> p = make_unique<int>(10);

Example Program

#include <iostream>
#include <memory>
using namespace std;
int main(){
    unique_ptr<int> p = make_unique<int>(50);
    cout << *p;
}

Expected Output

Program Explanation

unique_ptr owns the memory.
Memory is released automatically when p goes out of scope.

Exam Tip: In C++ practical answers, write the logic first, then the program, then expected output. For theory, always include one suitable example.

Where will you use it?

safe dynamic memory
modern C++ projects
resource management

Common Mistakes

Using raw new/delete unnecessarily.
Copying unique_ptr directly.

Practice Tasks

Create unique_ptr for Student object.
Explain ownership.

Summary

Smart Pointers is an important C++ topic. Learn the definition, understand the syntax, run the example program and then solve the practice tasks to make the concept strong.