The Program in C++ Program to check whether a number is a Strong Number or not is given below:

#include <iostream>
#include <cmath>

using namespace std;

int factorial(int n) {
    int result = 1;
    for (int i = 1; i <= n; i++) {
        result *= i;
    }
    return result;
}

int sum_of_factorials(int n) {
    int sum = 0;
    while (n != 0) {
        int digit = n % 10;
        sum += factorial(digit);
        n /= 10;
    }
    return sum;
}

bool is_Strong(int n) {
    return n == sum_of_factorials(n);
}

int main() {
    int n;
    cout << "Hello Codeauri Family,Enter a number here to check whether the number is strong number or not!: \n";
    cin >> n;
    if (is_Strong(n)) {
        cout << n << " is a Strong Number" << endl;
    } else {
        cout << n << " is not a Strong Number" << endl;
    }
    return 0;
}

Output:

Hello Codeauri Family,Enter a number here to check whether the number is strong number or not!:
145
145 is a Strong Number

Pro-Tips💡

The program defines two functions, factorial and sum_of_factorials.

The factorial function takes an integer n as input and returns its factorial.

The sum_of_factorials function takes an integer n as input and returns the sum of the factorials of its digits.

The is_Strong function takes an integer n as input and returns a Boolean indicating whether n is a Strong number or not.

It does this by calling the sum_of_factorials function with n as input and comparing the result with n.

In the main function, the program prompts the user to enter a number and stores the input in the n variable.

Then it calls the is_Strong function with n as input and prints whether n is a Strong number or not based on the result.