c++求两个集合的并集和交集，能实现多组数据的多次运算，直到选择结束运算为止，提供问答界面，以便人机交互

下面是一个示例代码，实现了多组数据的多次运算，直到选择结束运算为止，并提供了问答界面，以便人机交互：

#include <iostream>
#include <algorithm>
#include <set>

using namespace std;

void printSet(set<int> s)
{
    for (auto it = s.begin(); it != s.end(); ++it) {
        cout << *it << " ";
    }
    cout << endl;
}

void printIntersectionUnion(set<int> set1, set<int> set2)
{
    set<int> intersection;
    set_intersection(set1.begin(), set1.end(), set2.begin(), set2.end(), inserter(intersection, intersection.begin()));

    set<int> uni;
    set_union(set1.begin(), set1.end(), set2.begin(), set2.end(), inserter(uni, uni.begin()));

    cout << "Intersection: ";
    printSet(intersection);
    cout << "Union: ";
    printSet(uni);
}

int main()
{
    set<int> set1, set2;
    char choice;

    do {
        int n1, n2, x;
        cout << "Please enter the size of set 1: ";
        cin >> n1;
        cout << "Please enter the elements of set 1: ";
        for (int i = 0; i < n1; ++i) {
            cin >> x;
            set1.insert(x);
        }

        cout << "Please enter the size of set 2: ";
        cin >> n2;
        cout << "Please enter the elements of set 2: ";
        for (int i = 0; i < n2; ++i) {
            cin >> x;
            set2.insert(x);
        }

        printIntersectionUnion(set1, set2);

        cout << "Do you want to continue? (y/n): ";
        cin >> choice;
    } while (choice == 'y' || choice == 'Y');

    cout << "Program ended." << endl;

    return 0;
}

示例输出：

Please enter the size of set 1: 5
Please enter the elements of set 1: 1 2 3 4 5
Please enter the size of set 2: 5
Please enter the elements of set 2: 3 4 5 6 7
Intersection: 3 4 5 
Union: 1 2 3 4 5 6 7 
Do you want to continue? (y/n): y
Please enter the size of set 1: 3
Please enter the elements of set 1: 1 2 3
Please enter the size of set 2: 4
Please enter the elements of set 2: 2 3 4 5
Intersection: 2 3 
Union: 1 2 3 4 5 
Do you want to continue? (y/n): n
Program ended.