Armstrong number is a number which is equal to sum of digits raise to the power total number of digits in the number. For example, 371 is an Armstrong number since 3*3*3 + 7*7*7 + 1*1*1 = 371.

#include<iostream>
using namespace std;
int main()
{
int sum = 0, t, r;
int num = 371; //Change the number here
t = num;
while( t != 0 )
{
r = t%10;
sum = sum + r*r*r;
t = t/10;
}
if ( num == sum )
cout<< num <<" is an armstrong number";
else
cout<< num <<" is not an armstrong number";
return 0;
}

## Output :

371 is armstrong number

## Notes :

371 = 3*3*3 + 7*7*7 + 1*1*1

153 = 1*1*1 + 5*5*5 + 3*3*3

371 and 153 are Armstrong numbers

## Comments :