C++ Exercises: Check if a given array of integers contains 5 next to a 5 somewhere

C++ Basic Algorithm: Exercise-102 with Solution

Write a C++ program to check if a given array of integers contains 5 next to a 5 somewhere.

Sample Solution:

C++ Code :

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

using namespace std;  // Using standard namespace

// Function definition that checks if the array contains two consecutive 5s
static bool test(int nums[], int arr_length)
{
    // Loop through the array to check for two consecutive 5s
    for (int i = 0; i < arr_length - 1; i++)
    {
        if (nums[i] == 5 && nums[i] == nums[i + 1])  // Checking if two consecutive elements are both equal to 5
            return true;  // Returning true if two consecutive 5s are found
    }

    return false;  // Returning false if no two consecutive 5s are found
}

int main() 
{  
    int nums1[] = { 1, 5, 6, 9, 10, 17 };  // Initializing array nums1 with various integers
    int arr_length = sizeof(nums1) / sizeof(nums1[0]);  // Calculating length of array nums1

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

    int nums2[] = { 1, 5, 5, 9, 10, 17 };  // Initializing array nums2 with two consecutive 5s
    arr_length = sizeof(nums2) / sizeof(nums2[0]);  // Calculating length of array nums2

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

    int nums3[] = { 1, 5, 5, 9, 10, 17, 5, 5 };  // Initializing array nums3 with multiple consecutive 5s
    arr_length = sizeof(nums3) / sizeof(nums3[0]);  // Calculating length of array nums3

    // Calling test function with nums3 and displaying the result (true or false)
    cout << test(nums3, arr_length) << endl;

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

Sample Output:

0
1
1

Visual Presentation:

Flowchart:

C++ Code Editor:

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