C++ Exercises: Find Duck Numbers between 1 to 500

Last update on April 12 2025 13:00:38 (UTC/GMT +8 hours)

27. Find Duck Numbers Between 1 and 500

Write a C++ program to find Duck Numbers between 1 and 500.

Visual Presentation:

C++ Exercises: Find Duck Numbers between 1 to 500

Sample Solution:

C++ Code :

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

using namespace std; // Using the standard namespace

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

    cout << "\n\n Find Duck Numbers between 1 to 500: \n"; // Display a message
    cout << " ----------------------------------------\n";
    cout << " The Duck numbers are: " << endl;

    for (dkno = 1; dkno <= 500; dkno++) // Loop through numbers from 1 to 500
    {
        dno = dkno; // Store the current number in 'dno'
        flg = 0; // Reset the flag for each iteration

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

        if (dkno > 0 && flg == 1) // Check if the number is positive and contains a zero
        {
            cout << dkno << " "; // Display the Duck Number
        }
    }
    cout << endl;
}

Sample Output:

 Find Duck Numbers between 1 to 500:                                   
 ----------------------------------------                              
 The Duck numbers are:                                                 
10 20 30 40 50 60 70 80 90 100 101 102 103 104 105 106 107 108 109 110 
120 130 140 150 160 170 180 190 200 201 202 203 204 205 206 207 208 209
 210 220 230 240 250 260 270 280 290 300 301 302 303 304 305 306 307 30
8 309 310 320 330 340 350 360 370 380 390 400 401 402 403 404 405 406 4
07 408 409 410 420 430 440 450 460 470 480 490 500

Flowchart:

For more Practice: Solve these Related Problems:

Write a C++ program to list all duck numbers in a given range by processing each number as a string.
Write a C++ program to generate duck numbers between 1 and 500 using iterative string analysis.
Write a C++ program to display duck numbers by filtering an array of numbers with custom conditions.
Write a C++ program to identify duck numbers in a range with error-checking for numeric conversion issues.

C++ Code Editor:

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