Oerloading(Function and Operator) In Cpp

If we create two or more members having same name but different in number or type of parameter, it is known as C++ overloading. In C++, we can overload: methods, constructors, and indexed properties It is because these members have parameters only.

Types of overloading in C++ are:

• Function overloading
• Operators overloading

C++ Function Overloading

Having two or more function with same name but different in parameters, is known as function overloading in C++.
The advantage of Function overloading is that it increases the readability of the program because you don't need to use different names for same action.

C++ Function Overloading Example:

Let's see the simple example of function overloading where we are changing number of arguments of add() method.

#include <iostream>  
using namespace std;  
class Cal {  
    public:  
static int add(int a,int b){    
        return a + b;    
    }    
static int add(int a, int b, int c)    
    {    
        return a + b + c;    
    }    
};   
int main(void) {  
    Cal C;  
    cout<<C.add(10, 20)<<endl;    
    cout<<C.add(12, 20, 23);   
   return 0;  
}  

30
55

C++ Operators Overloading

Operator overloading is used to overload or redefine most of the operators available in C++. It is used to perform operation on user define data type.
The advantage of Operators overloading is to perform different operations on the same operand.

C++ Operators Overloading Example

Let's see the simple example of operator overloading in C++. In this example, void operator ++ () operator function is defined (inside Test class).

#include <iostream>  
using namespace std;  
class Test  
{  
   private:  
      int num;  
   public:  
       Test(): num(8){}  
       void operator ++()   
       {   
          num = num+2;   
       }  
       void Print() {   
           cout<<"The Count is: "<<num;   
       }  
};  
int main()  
{  
    Test tt;  
    ++tt;  // calling of a function "void operator ++()"  
    tt.Print();  
    return 0;  
}  

The Count is: 10