C++ Exercises: Check whether a number is a Duck Number or not

Last update on December 20 2024 12:30:49 (UTC/GMT +8 hours)

Write a C++ program to check whether a number is a Duck Number or not.

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Sample Solution:

C++ Code :

#include <bits/stdc++.h> // Includes all standard C++ libraries

using namespace std; // Using the standard namespace

int main()
{
    int dno, dkno, r, flg; // Declaring integer variables
    flg = 0; // Initializing flag variable

    cout << "\n\n Check whether a number is a Duck Number or not: \n"; // Displaying a message
    cout << " ----------------------------------------------------\n";
    cout << " Input a number: ";
    cin >> dkno; // Taking input from the user

    dno = dkno; // Storing the original number in 'dno'

    while (dkno > 0) // Loop to check if there is any zero digit in the number
    {
        if (dkno % 10 == 0) // If the last digit is zero
        {
            flg = 1; // Set flag to indicate the presence of zero
            break; // Exit the loop
        }
        dkno /= 10; // Move to the next digit by removing the last digit
    }

    if (dno > 0 && flg == 1) // Checking if the original number is positive and if there is a zero digit
    {
        cout << " The given number is a Duck Number." << endl; // Display if it's a Duck Number
    }
    else
    {
        cout << " The given number is not a Duck Number." << endl; // Display if it's not a Duck Number
    }
}

Sample Output:

Check whether a number is a Duck Number or not:                       
 ----------------------------------------------------                  
 Input a number: 30                                                    
 The given number is a Duck Number. 

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