DS-LAB(ARMSTRONG NUMBER)-EXPERIMENT-7

ALGORITHM TO CHECK ARMSTRONG NUMBER

CHECK ARMSTRONG (N)Let N be a three digit Integer. This algorithm checks that whether N is an Armstrong Number or not.

Step 1: Start

Step 2: Take Input N as Integer

Step 3: [ initializing SUM ] Set: SUM = 0

Step 4: Set: Number = N

Step 5: Repeat While Number ≠ 0

SUM = (Number%10)**3 + SUM

Number = Number/10

[ End of While Loop ]

Step 6: [ Checking ? ]

If SUM == N then

Print: N is an Armstrong Number.

Else

Print: N is not an Armstrong Number.

[End of If-Else Structure]

Step 7: Exit

FLOWCHART TO CHECK ARMSTRONG NUMBER

Source Code to Check Armstrong Number

/* C++ program to check whether a number entered by user is Armstrong or not. */

#include <iostream>
using namespace std;
int main()
{
  int n, n1, rem, num=0;
  cout << "Enter a positive  integer: ";
  cin >> n;
  n1=n;
  while(n1!=0)
  {
      rem=n1%10;
      num+=rem*rem*rem;
      n1/=10;
  }
  if(num==n)
    cout << n << " is an Armstrong number.";
  else
    cout << n << " is not an Armstrong number.";
  return 0;
}