#include <iostream>
using namespace std;
#include "complex.h"
int main()
{
Complex a(0.0,15),b(0,13),c;
c = 10;
cout << c <<endl;
c = -a;
cout << c <<endl;
c = a + b;
c = c - Complex(10);
cout << c <<endl;
c = 10 - a;
(c -=b) -=10;
cout << c <<endl;
}