Delve into Object-Oriented Programming in C++ and discover key concepts like classes, objects, inheritance, and polymorphism to create efficient, reusable, and secure code through hands-on challenges.

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cpp17

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Object-oriented programming (OOP) has been around for decades. If you have a basic understanding of C++ and are interested in leveling up your skills, this class will help you do just that. 

Starting with an overview of the basics, you’ll dive into understanding the time-honored technique for implementing complex applications using user-defined classes. Followed up by discussing classes and objects, and then building up to the high-level topics including inheritance and polymorphism. 

Throughout the course, you’ll be fully immersed in OOP for C++, with illustrations, exercises, quizzes, and hands-on challenges every step of the way. You’ll walk away with an understanding of classes and objects behavior and be able to easily create simple, efficient, reusable and secure code.

Learn Object-Oriented Programming in C++

What is the output of the following piece of code?

```C++
#include <iostream>
using namespace std;

class Base{
public:
 virtual void print() { 
 cout <<" Base Print";
 }
};
 
class Derived: public Base{
public:
 void print() {
 cout <<"Derived Print" ; 
 }
};
 
int main(){
 Base * bp;
 		Derived obj;
 
 bp = &obj;
 bp->print();
}
```

What is the output of the following piece of code?
<pre><code class="language-C++">#include &lt;iostream&gt;
using namespace std;

class Base{
public:
 virtual void print() { 
 cout &lt;&lt;&quot; Base Print&quot;;
 }
};
 
class Derived: public Base{
public:
 void print() {
 cout &lt;&lt;&quot;Derived Print&quot; ; 
 }
};
 
int main(){
 Base * bp;
 		Derived obj;
 
 bp = &amp;obj;
 bp-&gt;print();
}
</code></pre>

Does the code run successfully?

```C++
#include<iostream>
using namespace std;
 
class Base{
public:
 virtual void show() = 0;
};
 
int main(){
 Base b;
 Base *bp;
}
```

Does the code run successfully?
<pre><code class="language-C++">#include&lt;iostream&gt;
using namespace std;
 
class Base{
public:
 virtual void show() = 0;
};
 
int main(){
 Base b;
 Base *bp;
}
</code></pre>

What does the following piece of code do?

```C++
#include <iostream>
using namespace std;

class Shape {
 public:
 virtual float getArea() = 0;
};

class Rectangle : public Shape { 
 private:
 float width;
 float height;

 public:
 Rectangle(float wid, float heigh) {
 width = wid;
 height = heigh;
 }
 float getArea(){
 return width * height; 
 }
};

int main() {
	Shape * shp = new Rectangle(4, 5);
 float num = shp->getArea();
 cout << "Area of rectangle is " << num << endl;
}
```

What does the following piece of code do?
<pre><code class="language-C++">#include &lt;iostream&gt;
using namespace std;

class Shape {
 public:
 virtual float getArea() = 0;
};

class Rectangle : public Shape { 
 private:
 float width;
 float height;

 public:
 Rectangle(float wid, float heigh) {
 width = wid;
 height = heigh;
 }
 float getArea(){
 return width * height; 
 }
};

int main() {
	Shape * shp = new Rectangle(4, 5);
 float num = shp-&gt;getArea();
 cout &lt;&lt; &quot;Area of rectangle is &quot; &lt;&lt; num &lt;&lt; endl;
}
</code></pre>

Let's test your understanding of the polymorphism.

Introduction

Functions

Pointers

Classes

OOP in C++ Exam 1

Data Hiding

Inheritance

Polymorphism

Composition, Aggregation and Association

OOP in C++ Exam 2

Quiz