Armstrong number

Armstrong number is a number that is equal to the sum of cubes of its digits. For example 0, 1, 153, 370, 371 and 407 are the Armstrong numbers.

Let's try to understand why 153 is an Armstrong number.

153 = (1*1*1)+(5*5*5)+(3*3*3)

where:

(1*1*1)=1

(5*5*5)=125

(3*3*3)=27

1+125+27=153 it is an Armstrong number

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

#include<stdio.h>

int main()

{

int n,r,sum=0,temp;

printf("enter the number=");

scanf("%d",&n);

temp=n;

while(n>0)

{

    r=n%10;

    sum=sum+(r*r*r);

    n=n/10;

}

if(temp==sum)

    printf("armstrong number ");

else

    printf("Given number is not a armstrong number");

return 0;

}

OUTPUT:

enter the number=371

armstrong number

enter the number=45

Given number is not a armstrong number