showCombination.cpp

#include <iostream>
using namespace std;

const int n = 5;

void rec(int *xs, int i) {
    if (i == n) {
        cout << "----------------" << endl;
        for (int j = 0; j < n; j++) {
            cout << xs[j] << " ";
        }
        cout << endl;
        return;
    }
    xs[i] = 0;
    rec(xs, i+1);
    xs[i] = 1;
    rec(xs, i+1);
}

void printCombination() {
    int xs[n];
    for (int i = 0; i < n; i++) {
        xs[i] = 0;
    }
    rec(xs, 0);
}


int main() {
    printCombination();
}