/* Armstrong number 1 to 1000 - Write a function to check whether a given number is an armstrong number. Use this function to generate all armstrong numbers from 1 to 1000 */

#include  <stdio.h>
#include  <conio.h>

int check_armstrong(int  n) ;

void  main()
{
    int  n ;
    clrscr() ;
    printf("Armstrong numbers from 1 to 1000 are as shown: \n") ;
    for(n=1 ; n<=1000 ; n++)
        if(check_armstrong(n) == 1)
            printf("%d ", n) ;
    getch() ;
}

int check_armstrong(int  n)
{
    int  sum=0, r, temp ;
    temp=n ;
    while(n!=0)
        {
            r=n%10 ;    /* Extract the last digit */
            sum=sum+r*r*r ;  /* Finding sum */
            n=n/10 ;    /* Reduce number by 1 digit */
        }
    if(sum==temp)
        return 1 ;
    else
        return 0 ;
}

/*
Output :

Armstrong numbers from 1 to 1000 are as shown:
1 153 370 371 407
*/