<div class="image-550">
<img src="https://cdn.kahimyang.com/resources-24/solid-3.avif" alt="Dependency Inversion Principle" loading="lazy"/>
</div>

<h4>
Key Concepts of DIP
</h4>
<p>
The Dependency Inversion Principle is based on two main ideas:
</p>
<ul class="k-list">
<li>
High-Level Modules Should Not Depend on Low-Level Modules: Both should depend on abstractions.
</li>
<li>
Abstractions Should Not Depend on Details: Details (concrete implementations) should depend on abstractions.
</li>
</li>
Maintainability: Reduces tight coupling, making the codebase more maintainable and scalable.
</li>
</ul>
<h4>
Practical Example
</h4>
<p>
Let's consider an example without applying DIP:
</p>
<pre style="font-size: 90%;">
<code class="language-cpp line-numbers normalize-whitespace" >
// Without DIP
#include &lt;string>

class Database {
public:
    void query(const std::string& queryString) {
        // Perform database query
    }
};

class UserService {
private:
    Database db;
public:
    void getUserData() {
        db.query("SELECT * FROM users");
    }
};
</code>
</pre>
<p>
In this example, UserService directly depends on the concrete class Database, leading to tight coupling. Any change in Database would require changes in UserService as well.
</p>


Understanding the Dependency Inversion Principle in Object-Oriented Design