C Exercises: Find narcissistic decimal numbers within a specific range

Last update on December 20 2024 13:19:33 (UTC/GMT +8 hours)

Write a program in C to find narcissistic decimal numbers within a specific range.

Sample Solution:

C Code:

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

int main() 
{
    int nl, nu; // Variables for lower and upper limit of the range
    printf("\n\n Find the narcissistic decimal numbers between a specific range: \n");
    printf(" --------------------------------------------------------------------\n");
    printf(" Input the lower limit: ");
    scanf("%d", &nl); // Reading the lower limit from the user
    printf(" Input an upper limit: ");
    scanf("%d", &nu); // Reading the upper limit from the user
    printf(" The narcissistic decimal numbers between %d and %d are: \n", nl, nu);

    int i, ctr, j, orn, n, m, sum; // Variables for iteration, counting, number manipulation, and sum

    // Loop through numbers in the range [nl, nu] to find narcissistic decimal numbers
    for (orn = nl; orn <= nu; orn++)
    {
        ctr = 0; // Counter to count digits in the number
        sum = 0; // Variable to store the sum of digits powered by the number of digits

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

        // Calculate the sum of digits raised to the power of the count of digits
        n = orn;
        while (n > 0) 
        {
            m = n % 10;
            sum = sum + pow(m, ctr);
            n = n / 10;
        }

        // Check if the sum of powered digits is equal to the original number 'orn'
        if (sum == orn)
        {
            printf(" %d ", orn); // Print the narcissistic decimal number found
        }
    }
    printf("\n");
}

Sample Output:

 Input the lower limit: 100                                                                                   
 Input a upper limit: 1000                                                                                    
 The narcissistic decimal numbers between 100 and 1000 are:                                                   
 153  370  371  407

Visual Presentation:

Flowchart:

C Programming Code Editor:

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