Write a program to find whether the number is Armstrong number.

Dr. A.P.J. Abdul Kalam Technical University, Lucknow

KCS151 / KCS251 Programming for Problem Solving - Using C Language

Lab Exercises

8. Write a program to find whether the number is Armstrong number.

/*

 File: Prgrm08.c

 Author: Aditya Saini

 Date: Jan 16, 2021

 Description: Program to find whether the number is Armstrong number.

*/

#include <stdio.h>

#include <math.h>

int main (void)

{

     int num;

     int number_of_digits;

     int ArmStrong;

     int temp;

     //Input number

     printf ("Input number: ");

     scanf ("%d", &num);

     //Count number of digits

     temp = num;

     number_of_digits = 0;

     while (temp != 0)

     {

          temp = temp / 10;

          number_of_digits++;

     }

     //Finding if the number is Armstrong or not

     temp = num;

     ArmStrong = 0;

     while (temp != 0)

     {

          ArmStrong = ArmStrong + pow (temp % 10, number_of_digits);

          temp = temp / 10;

     }

     if (num == ArmStrong)

          printf ("%d is an Armstrong number.", num);

     else

          printf ("%d is not an Armstorng number.", num);

     return 0;

};

Output

Input number: 407

407 is an Armstrong number.