How can I find an element in a C++ STL vector?

How can I find an element in a C++ STL vector?

You can use the std::find algorithm from the <algorithm> header to find an element in a vector.

Can you show me an example of using std::find?

Sure! Here's a simple example:

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

int main() {
    std::vector<int> vec = {1, 2, 3, 4, 5};
    auto it = std::find(vec.begin(), vec.end(), 3);
    if (it != vec.end()) {
        std::cout << "Element found: " << *it << std::endl;
    } else {
        std::cout << "Element not found." << std::endl;
    }
    return 0;
}

What if the element is not in the vector?

If the element is not found, std::find will return vec.end(), which you can check to determine if the element exists.

Are there other ways to search in a vector?

Yes, you can also use binary search with std::binary_search if the vector is sorted, or you can implement your own search algorithm.