Question

How to find all the armstrong numbers in the range of 0 and 999 in C++

Answer 1

#include <iostream>

using namespace std;

// An Armstrong number of three digits is an integer that the sum 
// of the cubes of its digits is equal to the number itself

// 371 is an Armstrong number: 3**3 + 7**3 + 1**3 = 371

int main()
{
	int reminder, sum, tmp;

	for (int n = 0; n <= 999; n++)
	{
		tmp = n;
		sum = 0;

		while (tmp != 0)
		{
			reminder = tmp % 10;
			tmp = tmp / 10;
			sum = sum + (reminder * reminder * reminder);
		}
		if (sum == n)
			cout << n << endl;
	}

	return 0;
}

/*
run:

0
1
153
370
371
407

*/

 

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