C++ Exercises: Find Strong Numbers within a range of numbers
C++ Numbers: Exercise-40 with Solution
Write a C++ program to find Strong Numbers within a range of numbers.
Sample Solution:
C++ Code:
#include <iostream>
using namespace std;
int main()
{
int i, n, n1, s1 = 0, j, k, en, sn; // Declare variables for iteration and range of numbers
long fact; // Declare a variable to store factorial
// Prompt the user to input the range of numbers to find Strong numbers
cout << "\n\n Find Strong Numbers within a range of numbers:\n";
cout << "----------------------------------------------------\n";
cout << " Input the starting range of numbers: ";
cin >> sn; // Input starting range
cout << " Input the ending range of numbers: ";
cin >> en; // Input ending range
cout << " The Strong numbers within the range are: ";
// Loop through the numbers within the specified range
for (k = sn; k <= en; k++)
{
n1 = k; // Store the current number in n1
s1 = 0; // Initialize sum of factorials as 0
// Loop to calculate the sum of factorials of digits for each number
for (j = k; j > 0; j = j / 10)
{
fact = 1; // Initialize factorial as 1 for each digit
// Calculate factorial for each digit
for (i = 1; i <= j % 10; i++)
{
fact = fact * i; // Multiply each digit's factorial
}
s1 = s1 + fact; // Accumulate the sum of factorials for each digit
}
// Check if the sum of factorials of digits is equal to the original number
if (s1 == n1)
cout << n1 << " "; // Print the Strong number if found within the range
}
cout << endl;
}
Sample Output:
Check whether a number is Strong Number or not: ------------------------------------------------------- Input starting range of number: 1 Input ending range of number: 500 The Strong numbers are: 1 2 145
Flowchart:
C++ Code Editor:
Contribute your code and comments through Disqus.
Previous: Print the first 20 numbers of the Pell series.
Next: Check if a number is Keith or not.
What is the difficulty level of this exercise?
It will be nice if you may share this link in any developer community or anywhere else, from where other developers may find this content. Thanks.
https://www.w3resource.com/cpp-exercises/numbers/cpp-numbers-exercise-46.php
- Weekly Trends and Language Statistics
- Weekly Trends and Language Statistics