C++ Program to display Armstrong Numbers between 1 and 1000

An integer number is known as Armstrong number if the sum of cubes of its individual digits is equal to the number itself. Here we will write a program to display armstrong numbers upto 1000, if you are looking for a program to check armstrong number then refer: C++ program to check whether input number is armstrong or not.

Example: Prints Armstrong numbers upto 1000

This program prints the armstrong numbers between 1 and 100. To understand this program you should have the knowledge of nested for loop.

#include <cmath>
using namespace std;
int main(){
   int sum, num;
   cout<<"Armstrong numbers between 1 and 1000: ";
   for(int i = 0; i < 10; i++) {
      for(int j = 0; j < 10; j++) {
         for(int k = 0; k < 10; k++) {
            num = i * 100 + j * 10 + k;
            sum = pow(i, 3) + pow(j, 3) + pow(k, 3);
            if(num == sum)
               cout<<num<<"  ";
         }
      }
   }
   return 0;
}

Output:

Armstrong numbers between 1 and 1000: 0  1  153  370  371  407