C++ Exercises: Check whether a given array of integers contains 5's and 7's

C++ Basic Algorithm: Exercise-103 with Solution

Check if Array Contains Both '5' and '7'

Write a C++ program to check whether a given array of integers contains 5's and 7's.

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 5 or 7
static bool test(int nums[], int arr_length)
{
    // Loop through the array to check for the presence of 5 or 7
    for (int i = 0; i < arr_length; i++)
    {
        if (nums[i] == 5 || nums[i] == 7)  // Checking if the element is either 5 or 7
            return true;  // Returning true if 5 or 7 is found
    }

    return false;  // Returning false if neither 5 nor 7 is found in the array
}

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, 4, 7, 9, 10, 17 };  // Initializing array nums2 with 7
    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, 1, 2, 9, 10, 17 };  // Initializing array nums3 with no 5 or 7
    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:

1
1
0

Visual Presentation:

Flowchart:

C++ Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a C++ program to check if a given array of integers contains 5 next to a 5 somewhere.
Next: Write a C++ program to check if the sum of all 5' in the array exactly 15 in a given array of integers.