C++ / Complex Numbers

#include <iostream>
#define n 5
using namespace std;

struct Complex {
    char name[20];
    double a;
    double b;
};

Complex readinfo() {
    Complex x;
    cout << "Enter name: ";
    cin >> x.name;
    cout << "Enter the first variable: ";
    cin >> x.a;
    cout << "Enter the second variable: ";
    cin >> x.b;
    return x;
};

void showinfo(Complex x) {
    cout << x.name << ": " << x.a << "+" << x.b << "i" << endl;
};

int main() {
    Complex tab[n];
    Complex temp;
    int poz, supr;
    cout << "Enter 5 complex numbers: " << endl;
    for (int i = 0; i < n; i++) {
        tab[i] = readinfo();
    };
    for (int k = 0; k < n; k++) {
        for (int i = 0; i < (n-1); i++) {
            if (tab[i].b > tab[i+1].b) {
                temp = tab[i];
                tab[i] = tab[i+1];
                tab[i+1] = temp;
            };
        };
    };
    cout << "Sorted complex numbers: " << endl;
    for (int i = 0; i < n; i++) {
        showinfo(tab[i]);
    };
    return 0;
};