Question

I want to solve this question in C program, Please.

Answer 1

Answer:

#include <stdio.h>

#include <math.h>

int is_armstrong(int n) {

int cubedSum = 0;

int r = n;

while (r) {

         cubedSum += (int)pow(r % 10, 3);

          r = r / 10;

}

return cubedSum == n;

}

int stack_count(int n) {

int sum = 0;

while (n) {

         sum += n % 10;

         n = n / 10;

}

return sum;

}

int is_magical(int n) {

while (n > 9) {  

 n = stack_count(n);

 printf("%d ", n);

}

return n == 1;

}

int main()

{

int input = 0;

int isMagical, isArmstrong;

while (true) {

 printf("Enter a number: ");

 scanf_s("%d", &input, sizeof(int));

 if (input == -1) break;

 isArmstrong = is_armstrong(input);

 isMagical = is_magical(input);  

 if (isArmstrong && isMagical) {

  printf("%d is both an armstrong and a magical number.\n", input);

 } else if (isArmstrong) {

  printf("%d is an armstrong number\n", input);

 } else if (isMagical) {

  printf("%d is a magical number\n", input);

 } else {

  printf("%d is neither an armstrong or a magical number.\n", input);

 }

}

}

Explanation:

Here is a starting point. What's the definition of a magical number?