Example: FindLargestVectorMaxElement in C++

// FindLargestVectorMaxElement
#include <iostream>
#include <vector>       // Required for std::vector
#include <algorithm>    // Required for std::max_element
#include <limits>       // Required for std::numeric_limits

int main() {
    int size;

    // Step 1: Get array size from user
    std::cout << "Enter the number of elements: ";
    std::cin >> size;

    // Step 2: Validate size
    if (size <= 0) {
        std::cout << "Array size must be positive." << std::endl;
        return 1;
    }

    // Step 3: Declare a std::vector of integers with the specified size
    std::vector<int> numbers(size);

    // Step 4: Get elements from the user
    std::cout << "Enter " << size << " elements:" << std::endl;
    for (int i = 0; i < size; ++i) {
        std::cout << "Element " << i + 1 << ": ";
        std::cin >> numbers[i];
    }

    // Step 5: Find the largest element using std::max_element
    // std::max_element returns an iterator to the largest element.
    // Dereference it to get the value.
    int largest;
    if (size > 0) {
        largest = *std::max_element(numbers.begin(), numbers.end());
    } else {
        // Handle case for empty vector if size was initially 0
        // (though we already checked for size <= 0)
        largest = std::numeric_limits<int>::min(); // Or throw an exception
        std::cout << "Cannot find largest element in an empty array." << std::endl;
        return 1;
    }

    // Step 6: Display the largest element
    std::cout << "The largest element is: " << largest << std::endl;

    return 0; // std::vector automatically deallocates memory
}