C++ Exercises: Find the Authomorphic numbers between 1 to 1000

C++ Numbers: Exercise-25 with Solution

Write a C++ program to find the Authomorphic numbers between 1 and 1000.

Sample Solution:

C++ Code :

#include<iostream> // Including the input/output stream library
using namespace std; // Using the standard namespace

// Function to check if a number is an Automorphic Number
bool chkAutomor(int num1)
{
    int sqno = num1 * num1; // Computing the square of the input number
    while (num1 > 0) // Loop to check the digits
    {
        if (num1 % 10 != sqno % 10) // Checking the last digits
            return false; // If not equal, it's not an Automorphic Number
        num1 /= 10; // Move to the next digit in the input number
        sqno /= 10; // Move to the next digit in the square of the input number
    }
    return true; // If all digits match, it's an Automorphic Number
}

// Main function
int main()
{
    int i; // Variable for iteration

    cout << "\n\n Find the the Authomorphic numbers between 1 to 1000 \n"; // Displaying a message
    cout << " -------------------------------------------------------\n";
    cout << " The Authomorphic numbers are: "<<endl;

    // Checking numbers from 1 to 1000 for being Automorphic Numbers and displaying the result
    for(i=1;i<=1000;i++)
    {
        if( chkAutomor(i))
            cout << i<<" "; // Displaying the number if it's an Automorphic Number
    }
    cout<<endl;
    return 0; // Return 0 to indicate successful completion
}

Sample Output:

Find the the Authomorphic numbers between 1 to 1000                                                 
 -------------------------------------------------------                                             
 The Authomorphic numbers are:                                                                       
1 5 6 25 76 376 625

Flowchart:

C++ Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a program in C++ to check if a number is Authomorphic or not.
Next: Write a program in C++ to check whether a number is a Duck Number or not.