如何在std::vector中查找多个元素

#include <iostream>
#include <vector>
#include <algorithm>

int main() {
    std::vector<int> vec = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
    std::vector<int> elementsToFind = {3, 6, 9};

    std::vector<int> foundIndices;

    for (const auto& element : elementsToFind) {
        auto it = std::find(vec.begin(), vec.end(), element);
        if (it != vec.end()) {
            foundIndices.push_back(std::distance(vec.begin(), it));
        }
    }

    std::cout << "Found indices: ";
    for (const auto& index : foundIndices) {
        std::cout << index << " ";
    }
    std::cout << std::endl;

    return 0;
}