使用位掩码c++显示集合的所有子集的递归函数

#include <iostream>
#include <vector>

void printSubset(const std::vector<int>& set, const std::vector<int>& subset) {
    std::cout << "{ ";
    for (int i : subset) {
        std::cout << set[i] << " ";
    }
    std::cout << "}" << std::endl;
}

void generateSubsets(const std::vector<int>& set, std::vector<int>& subset, int index) {
    if (index == set.size()) {
        printSubset(set, subset);
        return;
    }

    subset.push_back(index);
    generateSubsets(set, subset, index + 1);

    subset.pop_back();
    generateSubsets(set, subset, index + 1);
}

void displayAllSubsets(const std::vector<int>& set) {
    std::vector<int> subset;
    generateSubsets(set, subset, 0);
}

int main() {
    std::vector<int> set = {1, 2, 3};
    displayAllSubsets(set);
    return 0;
}