#include <iostream>

using namespace std;

struct complex_number {
    double a;
    double b;
};

complex_number addition(const complex_number& x, const complex_number& y) {
    return complex_number{ (x.a + y.a), (x.b + y.b) };
}

complex_number deduction(const complex_number& x, const complex_number& y) {
    return complex_number{ (x.a - y.a), (x.b - y.b) };
}

void show(complex_number cn) {
    cout << cn.a << " " << cn.b << endl;
}

int main() {

    setlocale(LC_ALL, "ru");

    complex_number z1{ 5, -6 }, z2{ -3, 2 };

    complex_number z3 = addition(z1, z2);

    show(z3);

    z3 = deduction(z1, z2);

    show(z3);
}