Split an Integer into its digits c++

Question

I\'m trying to learn c++ on my own and I\'ve hit a bit of a road block. The problem is I need to take an integer,split it into its digits and get the sum of the digits and

Answer 1

Let's not forget the stringstream approach, which I also find elegant.

#include 
#include 

int main()
{
    int num = 123456789;
    std::cout << "Number: " << num << std::endl;

    std::stringstream tmp_stream;
    tmp_stream << num;
    std::cout << "As string: " << tmp_stream.str() << std::endl;

    std::cout << "Total digits: " << tmp_stream.str().size() << std::endl;


    int i;
    for (i = 0; i < tmp_stream.str().size(); i++)
    {
        std::cout << "Digit [" << i << "] is: " << tmp_stream.str().at(i) << std::endl;
    }

    return 0;
}

Outputs:

Number: 123456789
As string: 123456789
Total digits: 9
Digit [0] is: 1
Digit [1] is: 2
Digit [2] is: 3
Digit [3] is: 4
Digit [4] is: 5
Digit [5] is: 6
Digit [6] is: 7
Digit [7] is: 8
Digit [8] is: 9