- Binary operator works with two operands.
- The first operand becomes the operator overloaded function caller and the second is passed as an argument.
Example : Program demonstrating Binary operator overloading
//Arithmetic operation using Binary Operator Overloading
#include<iostream>
using namespace std;
class BinaryArithmetic
{
private:
float num;
public:
void getnumber()
{
num = 10;
}
BinaryArithmetic operator+(BinaryArithmetic &ab)
{
BinaryArithmetic x;
x.num = num + ab.num;
return x;
}
BinaryArithmetic operator-(BinaryArithmetic &ab)
{
BinaryArithmetic x;
x.num = num - ab.num;
return x;
}
BinaryArithmetic operator*(BinaryArithmetic &ab)
{
BinaryArithmetic x;
x.num = num * ab.num;
return x;
}
BinaryArithmetic operator/(BinaryArithmetic &ab)
{
BinaryArithmetic x;
x.num = num/ab.num;
return x;
}
void show()
{
cout<<num;
}
};
int main()
{
BinaryArithmetic ba1,ba2,ba3;
ba1.getnumber();
ba2.getnumber();
ba3 = ba1 + ba2;
cout<<"Addition : ";
ba3.show();
ba3 = ba1 - ba2;
cout<<"\n\n Subtraction : ";
ba3.show();
ba3 = ba1 * ba2;
cout<<"\n\n Multiplication : ";
ba3.show();
ba3 = ba1/ba2;
cout<<"\n\n Division : ";
ba3.show();
return 0;
}
Output:
Addition : 20
Subtraction : 0
Multiplication : 100
Division : 1
In the above example, overloading function for addition should be declared as, BinaryArithmetic operator+(BinaryArithmetic &ab); where BinaryArithmetic is a class name and ab is an object. To call function operator() the statement is as follows:
{
BinaryArithmetic x;
x.num = num+ab.num;
return x;
}
Member function can be called by using class of that object. The called member function is always preceded by the object.
In the above statement, the object x invokes the operator() function and the object ab is used as an argument for the function. The data member num is passed directly. While overloading binary operators, the left-hand operand calls the operator function and the right-hand operator is used as an argument.
Binary operator requires one argument and the argument contains value of the object to the right of the operator.
