c++求两个数组的并集和交集，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>
#include <vector>

using namespace std;

void printArray(int arr[], int n)
{
    for (int i = 0; i < n; ++i) {
        cout << arr[i] << " ";
    }
    cout << endl;
}

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

void printIntersectionUnion(int arr1[], int n1, int arr2[], int n2)
{
    set<int> set1(arr1, arr1 + n1);
    set<int> set2(arr2, arr2 + n2);

    vector<int> intersection(n1 + n2);
    auto it = set_intersection(set1.begin(), set1.end(), set2.begin(), set2.end(), intersection.begin());
    intersection.resize(it - intersection.begin());

    vector<int> uni(n1 + n2);
    it = set_union(set1.begin(), set1.end(), set2.begin(), set2.end(), uni.begin());
    uni.resize(it - uni.begin());

    cout << "Intersection: ";
    printArray(intersection.data(), intersection.size());
    cout << "Union: ";
    printSet(set<int>(uni.begin(), uni.end()));
}

int main()
{
    int arr1[100], arr2[100], n1, n2;
    char choice;

    do {
        cout << "Please enter the size of array 1: ";
        cin >> n1;
        cout << "Please enter the elements of array 1: ";
        for (int i = 0; i < n1; ++i) {
            cin >> arr1[i];
        }

        cout << "Please enter the size of array 2: ";
        cin >> n2;
        cout << "Please enter the elements of array 2: ";
        for (int i = 0; i < n2; ++i) {
            cin >> arr2[i];
        }

        printIntersectionUnion(arr1, n1, arr2, n2);

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