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<h3 class="pb-3 pt-3">C++ Function Overriding</h3>
<p>In this tutorial, we are going to learn about function overidding in C++</p>
<p>Function overriding occurs when base class and derived class contains
same function with same name and parameter. As a result of this, the
derived class function hides the base class function. This means the
derived class redefines the base class function.</p>
<p>Let’s take an example for better understanding.</p>
<pre>#include <iostream>
using namespace std;
class Animal {
public:
void eat(){
cout<<"Eating...";
}
};
class Cow: public Animal
{
public:
void eat()
{
cout<<"Eating grass";
}
};
int main(void) {
Cow c;
c.eat();
return 0;
} </pre>
<p><strong>Output:</strong></p>
<pre>Eating grass</pre><br>
<p>In this program, we have two classes, one is <strong>Animal</strong> acting as base class
and other is <strong>Cow</strong> acting as derived class. You may have noticed that
both the classes contains functions with same name and parameters,
i.e <strong>eat()</strong>.</p>
<p>Now, when we call this function in <strong>main()</strong>, the function present in <strong>Cow</strong>
is called.</p>
<p>This overrides the function present in class <strong>Animal</strong></p>
<img src="images/photo1__ operator overriding.jpg" alt="photo1_operator overriding">
<hr/>
<h4 class="pt-3 pd-3">Accessing Overridden function in base class</h4>
<p>To access the overridden function of the base class from the derived
class, scope resolution operator :: is used. For example,</p>
<p>If you want to access <strong>eat()</strong> function of the <strong>Animal</strong> class, you can use the
following statement in the derived class.</p>
<pre>Animal::eating();</pre><br>
<pre>#include <iostream>
using namespace std;
class Animal {
public:
void eat(){
cout<<"Eating...";
}
};
class Cow: public Animal
{
public:
void eat() {
Animal::eat();
}
};
int main(void) {
Cow c;
c.eat();
return 0;
} </pre>
<p><strong>Output:</strong></p>
<pre>Eating…</pre>
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