program to demonstrate between the given intervals using pow() an armstrong number

// C program to demonstrate an armstrong number
// between the given intervals using pow()

#include <math.h>
#include <stdio.h>
int main()
{

	int s = 1, e = 500, num1, n, arm = 0, i, num2, c;
	// iterating the for loop using the given intervals
	for (i = s; i <= e; i++) {
		num1 = i;
		num2 = i;
		// finding the number of digits
		while (num1 != 0) {
			num1 = num1 / 10;
			++c;
		}
		// finding the armstrong number
		while (num2 != 0) {
			n = num2 % 10;
			arm = arm + pow(n, 3);
			num2 = num2 / 10;
		}
		// if number is equal to the arm then it is a
		// armstrong number
		if (arm == i) {
			printf("%d\n", i);
		}
		arm = 0;
		c = 0;
	}
	return 0;
}