检查std :: vector是否包含某个对象？

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

int main() {
    std::vector<int> vec = {1, 2, 3, 4, 5};

    int target = 3;
    auto it = std::find(vec.begin(), vec.end(), target);

    if (it != vec.end()) {
        std::cout << "Vector contains " << target << std::endl;
    } else {
        std::cout << "Vector does not contain " << target << std::endl;
    }

    return 0;
}

Vector contains 3