C++ Exercises: Find the largest value from first, last, and middle elements of a given array of integers of odd length

Last update on December 20 2024 12:28:43 (UTC/GMT +8 hours)

Find Largest of First, Last, Middle Elements in Odd-Length Array

Write a C++ program to find the largest value from the first, last, and middle elements of a given array of integers of odd length (at least 1).

Sample Solution:

C++ Code :

#include <iostream>  // Including input-output stream header file

using namespace std;  // Using standard namespace

// Function definition that finds the maximum value among the first, middle, and last elements of an array
static int test(int numbers[], int arr_length)
{
    int first, middle_ele, last_ele, max_ele;  // Declaring integer variables

    first = numbers[0];  // Storing the first element of the array
    middle_ele = numbers[arr_length / 2];  // Storing the middle element of the array
    last_ele = numbers[arr_length - 1];  // Storing the last element of the array
    max_ele = first;  // Initializing max_ele with the first element of the array

    // Checking if middle element is greater than max_ele
    if (middle_ele > max_ele)
    {
        max_ele = middle_ele;  // Updating max_ele if middle element is greater
    }

    // Checking if last element is greater than max_ele
    if (last_ele > max_ele)
    {
        max_ele = last_ele;  // Updating max_ele if last element is greater
    }

    return max_ele;  // Returning the maximum element among first, middle, and last
}

int main() 
{  
    int nums1[] = {1};  // Initializing array nums1 with a single element
    int arr_length = sizeof(nums1) / sizeof(nums1[0]);  // Calculating length of array nums1

    // Calling test function with nums1 and displaying the result
    cout << test(nums1, arr_length) << endl; 

    int nums2[] = {1,2,9};  // Initializing array nums2 with three elements
    arr_length = sizeof(nums2) / sizeof(nums2[0]);  // Calculating length of array nums2

    // Calling test function with nums2 and displaying the result
    cout << test(nums2, arr_length) << endl;

    int nums3[] = {1,2,9,3,3};  // Initializing array nums3 with five elements
    cout << test(nums3, arr_length) << endl;  // Calling test function with nums3 and displaying the result

    int nums4[] = {1,2,3,4,5,6,7};  // Initializing array nums4 with seven elements
    arr_length = sizeof(nums4) / sizeof(nums4[0]);  // Calculating length of array nums4

    // Calling test function with nums4 and displaying the result
    cout << test(nums4, arr_length) << endl;

    int nums5[] = {1,2,2,3,7,8,9,10,6,5,4};  // Initializing array nums5 with eleven elements
    arr_length = sizeof(nums5) / sizeof(nums5[0]);  // Calculating length of array nums5

    // Calling test function with nums5 and displaying the result
    cout << test(nums5, arr_length) << endl;

    return 0;  // Returning 0 to indicate successful completion of the program
}

Sample Output:

1
9
9
7
8

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