Fix the WriteComplex function so it displays complex numbers better:

real = 2 imaginary = 3.5 2 + 3.5i real = -2 imaginary = -0.5 -2 - 0.5i real = 0 imaginary = 8.15 8.15i real = 3.14 imaginary = 0 3.14 real = 2 imaginary = 1 2 + i real = -1 imaginary = -1 -1 - i 

2.Write an additional function to do the subtraction of two complex numbers

3. Write an additional function to do the multiplication of two complex

#include
	using std::cout;
	using std::cin;
	using std::endl;
	using std::ostream;
	using std::istream;
	struct Complex{
	double real;
	double imaginary;
	};
	void ReadComplex(Complex&, istream&);
	void PrintComplex(const Complex&, ostream&);
	void Initialize(Complex&);
	Complex sum(const Complex&, const Complex&);
	int main(){
	cout << sizeof(Complex) << endl;
	Complex var1, var2;
	Initialize(var1);
	Initialize(var2);
	cout << "Please input a complex number (real imaginary): ";
	ReadComplex(var1, cin);
	cout << "Please input a complex number (real imaginary): ";
	ReadComplex(var2, cin);
	cout << "The complex numbers read are: " << endl;
	PrintComplex(var1, cout);
	cout << endl;
	PrintComplex(var2, cout);
	cout << endl;
	Complex var3;
	var3 = sum(var1, var2);
	cout << "The result of adding them together is: ";
	PrintComplex(var3, cout);
	cout << endl;
	return 0;
	}
	void ReadComplex(Complex& complex, istream& in){
	in >> complex.real >> complex.imaginary;
	}
	void PrintComplex(const Complex& complex, ostream& out){
	out << complex.real << " + " << complex.imaginary << "i";
	}
	void Initialize(Complex& complex){
	complex.real = complex.imaginary = 0.0;
	}
	Complex sum(const Complex& lhs, const Complex& rhs){
	Complex retVal;
	retVal.real = lhs.real + rhs.real;
	retVal.imaginary = lhs.imaginary + rhs.imaginary;
	return retVal;
	}