How to make an element finder function/class?

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This is kind of a problem since I try this with functions and templates but I figure I may as well take any advice and help those with more experience can give me. So how would I be able to make a function or class to find an element in a vector? Any help given is appreciated!

What I have tried:

Google, Documentation, wiki upon wiki.

Posted 14-Aug-23 0:33am

Brennon Nevels

Updated 14-Aug-23 1:07am

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2 solutions

Solution 1

You could use std::find: How to find out if an item is present in a std::vector?[^]

A very quick google would have got you that half an hour ago ... I searched for "vector.find c++" and it was the top hit.

Posted 14-Aug-23 1:04am

OriginalGriff

Updated 14-Aug-23 1:05am

v2

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Andre Oosthuizen · Accepted Answer · 2023-08-14T01:07:00

Google is your friend, not sure what you searched for. I found this link with sample code - C++ Find Element in Vector [^]

Your code will look something like -

C++

#include <iostream>
#include <vector>

// Function to find an element in a vector
template <typename T>
bool findElementInVector(const std::vector<T>& vec, const T& element) {
    //Iterate through the vector...
    for (const T& item : vec) {
        //Check if the current element matches the target element...
        if (item == element) {
            return true; //Element found, all good...
        }
    }
    return false; //Element not found,...
}

int main() {
    // Example usage
    std::vector<int> numbers = {1, 2, 3, 4, 5};

    int target = 3;
    if (findElementInVector(numbers, target)) {
        std::cout << "Element " << target << " found in the vector." << std::endl;
    } else {
        std::cout << "Element " << target << " not found in the vector." << std::endl;
    }

    target = 6;
    if (findElementInVector(numbers, target)) {
        std::cout << "Element " << target << " found in the vector." << std::endl;
    } else {
        std::cout << "Element " << target << " not found in the vector." << std::endl;
    }

    return 0;
}

Using an online compiler like -
C++ Online Compiler [^], I get an output of -

Output

Element 3 found in the vector.
Element 6 not found in the vector