cpp-example/All_Operations_of_Complex_Numbers.cpp at main · suman-shah/cpp-example · GitHub

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#include <iostream>
using namespace std;

class comp
{
	int r, i;

	public:
    void input()
    {
      cout << "Enter real & imaginary parts : ";
      cin >> r >> i;
    }

    void display()
    {
      cout << "Result : " << r << "+i" << i << endl;
    }

    comp operator + (comp c2)
    {
      comp c3;
      c3.r = r + c2.r;
      c3.i = i + c2.i;
      return c3;
    }

    comp operator - (comp c2)
    {
      comp c3;
      c3.r = r - c2.r;
      c3.i = i - c2.i;
      return c3;
    }

    comp operator * (comp c2)
    {
      comp c3;
      c3.r = r*c2.r + i*c2.i;
      c3.i = i*c2.r + r*c2.i;
      return c3;
    }

    comp operator / (comp c2)
    {
      comp c3;
      c3.r = ( r*c2.r + i*c2.i ) / ( c2.r*c2.r + c2.i*c2.i );
      c3.i = ( r*c2.i - i*c2.r ) / ( c2.r*c2.r + c2.i*c2.i );
      return c3;
    }
};

void option ( comp b1, comp b2, comp &b3 )
{
	int n;

	cout << endl << "Options:" << endl << endl;
	cout << "1.Addition" << endl;
	cout << "2.Subtraction" << endl;
	cout << "3.Multiplication" << endl;
	cout << "4.Division" << endl;

	cout << "Enter your option : ";
	cin >> n;

	switch ( n )
	{
		case 1 : b3 = b1+b2; break;
		case 2 : b3 = b1-b2; break;
		case 3 : b3 = b1*b2; break;
		case 4 : b3 = b1/b2; break;
	}

	return ;
}

int main()
{
	comp b1,b2,b3;

	b1.input();
	b2.input();

	option(b1,b2,b3);

	b3.display();

	return 0;
}