Question

write a program to print the magical number
​

Answer 1

Answer:

// CPP program to check if a number is Magic

// number.

#include<iostream>

using namespace std;

bool isMagic(int n)

{

int sum = 0;

// Note that the loop continues

// if n is 0 and sum is non-zero.

// It stops when n becomes 0 and

// sum becomes single digit.

while (n > 0 || sum > 9)

{

if (n == 0)

{

n = sum;

sum = 0;

}

sum += n % 10;

n /= 10;

}

// Return true if sum becomes 1.

return (sum == 1);

}

// Driver code

int main()

{

int n = 1234;

if (isMagic(n))

cout << "Magic Number";

else

cout << "Not a magic Number";

return 0;

}