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Write a program using functions to print armstrong series numbers.

Source Code

#include <stdio.h>
int is_armstrong (int num)
{
  int sum = 0, temp, remainder;
  temp = num;
  while( temp != 0 )
  {
10      /* Get the digit */
11      remainder = temp % 10;
12      /* calculate cube and sum up */
13      sum = sum + (remainder * remainder * remainder);
14      /* Shift right by one digit */
15      temp = temp / 10;
16    }
17 
18    if ( num == sum ) {
19      return 1; /* armstrong number */
20    } else {
21      return 0; /* not armstrong number */
22    }
23  }
24 
25  /* Printing Armstrong number series */
26  int main(int argc, char *argv[])
27  {
28    int range;
29    printf ("Enter Max range: ");
30    scanf ("%d", &range);
31    printf ("Printing armstrong numbers from 0 - %d\n", range);
32    for (number = 0; number <= range; number++) {
33      if ( is_armstrong(number) ) {
34        printf ("%d, ", number);
35      }
36    }
37    return 0;
38  }
39 

Output

Enter Max range: 15000
Printing armstrong numbers from 0 - 15000
0, 1, 153, 370, 371, 407,

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