CODE EXAMPLE FOR CPP

c++ set intersection

// CPP program to illustrate
// std :: set_intersection
 
#include <bits/stdc++.h>
 
int main()
{
    int first[] = { 5, 10, 15, 20, 25 };
    int second[] = { 50, 40, 30, 20, 10 };
    int n = sizeof(first) / sizeof(first[0]);
 
    std::vector<int> v1(5);
    std::vector<int> v2(5);
    std::vector<int>::iterator it, ls;
 
    std::sort(first, first + 5);
    std::sort(second, second + 5);
 
    // Print elements
    std::cout << "First array :";
    for (int i = 0; i < n; i++)
        std::cout << " " << first[i];
    std::cout << "
";
 
    // Print elements
    std::cout << "Second array :";
    for (int i = 0; i < n; i++)
        std::cout << " " << second[i];
    std::cout << "

";
 
    // std :: set_intersection
    ls = std::set_intersection(first, first + 5, second, second + 5, v1.begin());
 
    std::cout << "The intersection has " << (ls - v1.begin()) << " elements:";
    for (it = v1.begin(); it != ls; ++it)
        std::cout << ' ' << *it;
    std::cout << "
";
 
    return 0;
}