KR1.15

#include <iostream>
#include <math.h>

using namespace std;

class Complex
{
protected:
    float re, im;
public:
    Complex(float Re, float Im):re(Re), im(Im){}
    Complex() :re(0.), im(0.){}
    friend istream& operator >> (istream& s, Complex& C) { return s >> C.re >> C.im; }
    friend ostream& operator << (ostream& s, Complex C) { return s << "(" << C.re << "," << C.im << "i" << ")" << endl; }
    Complex operator * (float k) { Complex A; A.re = re*k; A.im = im*k; return A;}
    Complex& operator *= (Complex A) { im *= A.im, re *= A.re; return *this; }
};

class Complex_arr : public Complex
{
private:
    Complex* a;
    int len;
public:
    Complex_arr(int Len) { a = new Complex[Len], len = Len; }
    friend istream& operator >> (istream& s, Complex_arr& C) { for (int i = 0; i < C.len; i++) s >> C.a[i]; return s; }
    friend ostream& operator << (ostream& s, Complex_arr C) { for (int i = 0; i < C.len; i++) s << C.a[i]; s << endl; return s; }
    Complex_arr& operator *= (Complex_arr A) { for (int i = 0; i < len; i++) a[i] *= A.a[i]; return *this; }

};


int main()
{
    int l;
    float N;
    Complex A(1, 1), B, C;
    cout << "Input complex number (B) and real number N: ";
    cin >> B >> N;
    C = A * N;
    cout << "B*N is " << (B * N) << endl << "A*N is " << C << endl;
    cout << "Input arrays length: ";
    cin >> l;
    Complex_arr D(l), E(l);
    cout << "Input arrays. \n";
    cin >> D >> E;
    cout << "D and E\n" << D << E;
    cout << "D*=E is \n" << (D *= E);
    cout << "Now D is \n" << D;

}