The below program checks for an Armstrong number using a loop. The CPP cout object is used to output the result on the screen. A number is called as an Armstrong number if the sum of the cubes of its digits is equal to the number itself.
Armstrong Number:
abc = (a*a*a) + (b*b*b) + (c*c*c)
Example: 0, 1, 153, 371, 407, etc.
Code:
#include <iostream.h> using namespace std; int main() { int num,x; int sum = 0; cout << "Enter a number:"; cin >> num; int i = num; while(i!=0) { x = i%10; sum= sum + x*x*x; i = i/10; } if(num==sum) cout << num << " is an Armstrong Number."; else cout << num << " is not an Armstrong Number."; return 0; } |
Output
Enter a number:407 407 is an Armstrong Number. |
