C++ Exercises: Check a given array of integers of length 1 or more and return true if the first element and the last element are equal in the given array

Last update on December 20 2024 12:22:10 (UTC/GMT +8 hours)

First and Last Elements Match Check

Write a C++ program to check a given array of integers of length 1 or more. The program will return true if the first element and the last element are equal in the given array.

Sample Solution:

C++ Code :

#include <iostream> // Including the input/output stream library
using namespace std; // Using the standard namespace

// Function that checks if the first and last elements of an integer array are equal
bool test(int nums[], int arr_length)
{
    return arr_length > 0 && nums[0] == nums[arr_length - 1];
    // Return true if the array length is greater than 0 and the first element equals the last element
}

// Main function
int main() 
{
    int arr_length; // Declare variable to store array length

    int nums1[] = {10, 20, 40, 50 }; // Define an array nums1
    arr_length = sizeof(nums1) / sizeof(nums1[0]); // Calculate the length of nums1
    cout << test(nums1, arr_length) << endl; // Output result of test function for nums1

    int nums2[] = {10, 20, 40, 10}; // Define an array nums2
    arr_length = sizeof(nums2) / sizeof(nums2[0]); // Calculate the length of nums2
    cout << test(nums2, arr_length) << endl; // Output result of test function for nums2

    int nums4[] = {12, 24, 35, 55}; // Define an array nums4
    arr_length = sizeof(nums4) / sizeof(nums4[0]); // Calculate the length of nums4
    cout << test(nums4, arr_length) << endl; // Output result of test function for nums4

    return 0; // Return statement indicating successful termination of the program
}

Sample Output:

0
1
0

Visual Presentation:

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