Find the sum of digits of given number in C plus plus?

Answer 1

#include<iostream>

unsigned sum_of_digits(unsigned num)

{

unsigned sum = 0;

do

{

sum += num%10;

} while(num/=10);

return sum

}

int main()

{

unsigned num = 42;

unsigned sum = sum_of_digits (num);

std::cout << sum; // output: 6

}