01 #include<stdio.h>
02 
03 int main()
04 {
05  int a,n,b=0,t; 
06 
07  printf("Enter the no");
08  scanf("%d",&n); 
09  t=n;
10   
11  while(n>0) 
12  {
13   a=n%10; 
14   b=b+a*a*a; 
15   n=n/10; 
16  }
17  if(b==t) 
18  {
19  printf("Armstrong no");
20  }
21  else
22  {
23   printf("Not an armstrong no");
24  }
25  
26  return 0;
27 }

 
 OUTPUT :
 
 (1st Run)
 
 Enter the no 153
 Armstrong no
 
 (2nd Run)
 
 Enter the no 123
 Not an armstrong no