Armstrong Number I

C++ PROGRAMS

An Armstrong number is a number which is equal to the sum of its digits raised to the power of total number of digits.

For example: 

153 = 1^3 + 5^3 + 3^3

The following program is for determining whether the 3-digit entered by the user is an Armstrong Number or not.

In the program I will use simple if-else statement. 

Code: 

#include<iostream.h>

#include<conio.h>

void main()

{

clrscr();

int a,b,c,d;

cout<<"Enter a 3 digit no.: ";

cin>>a;

b=a%10;  

c=a/10; 

c=c%10;

d=a/100;

b=b*b*b;

c=c*c*c;

d=d*d*d;

if(a==b+c+d)

cout<<"An Armstrong Number"<<"\n";

else

cout<<"Not an Armstrong Number"<<"\n";

getch();

}

Output:

First Run:

Second Run:

We can also find all the 3-digit Armstrong numbers. For that please go through Armstrong Number II

For any queries or suggestions please comment !