C++ Exercises: Check if a given array of integers contains no 3 or a 5

Last update on December 20 2024 12:21:20 (UTC/GMT +8 hours)

Check if Array Contains No '3' or '5'

Write a C++ program to check if a given array of integers contains no 3 or 5.

Sample Solution:

C++ Code :

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

using namespace std;  // Using standard namespace

// Function definition that checks for the presence of both 3 and 5 in an array
static bool test(int nums[], int arr_length)
{
    bool three = false;  // Initializing a boolean variable to track presence of 3
    bool five = false;   // Initializing a boolean variable to track presence of 5

    // Loop through the array to check for the presence of 3 and 5
    for (int i = 0; i < arr_length; i++)
    {
        if (nums[i] == 3) { three = true; }  // Setting 'three' to true if element is 3
        if (nums[i] == 5) { five = true; }   // Setting 'five' to true if element is 5
        if (three && five) { return false; } // Returning false if both 3 and 5 are found
    }

    return true;  // Returning true if either 3 or 5 is absent or both are absent in the array
}

int main() 
{  
    int nums1[] = {5, 5, 5, 5, 5};  // Initializing array nums1 with all elements as 5
    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[] = {3, 3, 3, 3};  // Initializing array nums2 with all elements as 3
    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[] = {3, 3, 3, 5, 5, 5};  // Initializing array nums3 with elements as both 3 and 5
    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;

    int nums4[] = {1, 6, 8, 10};  // Initializing array nums4 with elements other than 3 and 5
    arr_length = sizeof(nums4) / sizeof(nums4[0]);  // Calculating length of array nums4

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

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

Sample Output:

1
1
0
1

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