Question

Write a program in C++ to overload Minus operator for a Complex number class.  Create two object in main function from the Complex and demonstrate minus operation with complex class objects.​

Answer 1

#include <iostream>

using namespace std;

class Complex

{

   private:

     float real;

     float imag;

   public:

      Complex(): real(0), imag(0){ }

      void input()

      {

          cout << "Enter real and imaginary parts respectively: ";

          cin >> real;

          cin >> imag;

      }

      // Operator overloading

      Complex operator - (Complex c2)

      {

          Complex temp;

          temp.real = real - c2.real;

          temp.imag = imag - c2.imag;

          return temp;

      }

      void output()

      {

          if(imag < 0)

              cout << "Output Complex number: "<< real << imag << "i";

          else

              cout << "Output Complex number: " << real << "+" << imag << "i";

      }

};

int main()

{

   Complex c1, c2, result;

   cout<<"Enter first complex number:\n";

   c1.input();

   cout<<"Enter second complex number:\n";

   c2.input();

   // In case of operator overloading of binary operators in C++ programming,  

   // the object on right hand side of operator is always assumed as argument by compiler.

   result = c1 - c2;

   result.output();

   return 0;

}