C Program for Armstrong Number - C program to check whether number is Armstrong or not

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C program to check whether number is Armstrong or not

Armstrong Number - An Armstrong Number is a Number which is equal to it’s sum of digit’s cube. For example - 153 is an Armstrong number: here 153 = (1*1*1) + (5*5*5) + (3*3*3).
Following program will read an integer and check whether it is Armstrong Number or Not.
To check Armstrong number, we have to calculate sum of each digit’s cube and then compare number is equal to Sum or not.

Sample Code

#include <stdio.h>
int Power(int n, int r)
{
    int k, p = 1;
    for (k = 1; k <= r; k++)
        p = p*n;
    return p;
}
int main()
{
    int a=371,sum = 0,temp,remainder,digit = 0;
    temp = a;
    while (temp != 0) 
    {
        digit++;
        temp = temp/10;
    }
    temp = a;
    while (temp != 0)
    {
        remainder = temp%10;
        sum = sum + Power(remainder, digit);
        temp = temp/10;
    }
    if (a == sum)
        printf("%d is an Armstrong number.\n", a);
    else
        printf("%d is not an Armstrong number.\n",a);
    return 0;
}

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