Identifying characters of a number

Question

To analyze every character of a given number, like 2002, to be able to separate them I need to convert it to a string. But, as soon as I do that, how to manage this string?(its name and size). Just like when I need to say if the given number is a palindrome for example, after I convert the number to a string, how to manage this string?

Answer 1

Use to_string(), like this for example (printing every digit of the number, after converting the number to string, printing every character of the string that is):

#include <iostream> // std::cout
#include <string> // std::string, std::to_string

int main ()
{
  std::string str = std::to_string(2002);
  for(auto c: str)
    std::cout << c << " ";
  std::cout << std::endl;
  return 0;
}

Output:

2 0 0 2

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PS: For the palindrome example you mention, please read Check if a string is palindrome.