C Exercises: Generate and show the first 15 narcissistic decimal numbers

Last update on August 05 2025 12:55:45 (UTC/GMT +8 hours)

10. Narcissistic Numbers Variants

Write a program in C to generate and show the first 15 narcissistic decimal numbers.

Sample Solution:

C Code:

#include <stdio.h>
#include <math.h>
#include <stdlib.h>

int main() 
{
    printf("\n\n Find the first 15 narcissistic decimal numbers: \n");
    printf(" -----------------------------------------------------\n");
    printf(" The first 15 narcissistic decimal numbers are: \n");

    int i, ctr, j, orn, n, m, sum;
    orn = 1; // Initialize the original number to check

    for (i = 1; i <= 15;) // Loop to find the first 15 narcissistic decimal numbers
    {
        ctr = 0; // Initialize digit counter for each number
        sum = 0; // Initialize sum of digits raised to power 'ctr'

        n = orn; // Assign original number to 'n'

        // Count the number of digits in the number 'n'
        while (n > 0) 
        {
            n = n / 10;
            ctr++;
        }

        n = orn; // Reset 'n' to the original number

        // Calculate the sum of digits raised to power 'ctr'
        while (n > 0) 
        {
            m = n % 10; // Extract individual digits
            sum = sum + pow(m, ctr); // Add the digit raised to the power 'ctr' to 'sum'
            n = n / 10; // Move to the next digit
        }

        // Check if the sum of digits raised to power 'ctr' equals the original number
        if (sum == orn) 
        {
            printf("%d ", orn); // Print the narcissistic number
            i++; // Increment the count of narcissistic numbers found
        }
        orn++; // Move to the next number to check
    }

    printf("\n");
    return 0;
}

Sample Output:

 The first 15 narcissistic decimal numbers are:                                                               
1 2 3 4 5 6 7 8 9 153 370 371 407 1634 8208

Visual Presentation:

C programming: Generate and show the first 15 narcissistic decimal numbers.

Flowchart:

For more Practice: Solve these Related Problems:

Write a C program to generate narcissistic numbers for numbers with varying digit lengths.
Write a C program to check if a number is narcissistic by summing the powers of its digits.
Write a C program to list the first n narcissistic numbers based on user input.
Write a C program to verify narcissistic numbers using recursive digit extraction.

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