converting an array of integers to string

Question

If I have an array that looks like

int digits[size] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 0, 4}

I want to remove the leading zeros and to d

Answer 1

you can use C++11 function std::to_string() here is an example

#include 
#include 

int main()
{
   int size = 15;
   int digits[size] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 0, 4};
   std::string result = "";

   for (int i = 0; i < size; i++)
   {
      if (!(digits[i] == 0 && result.size() == 0))
         result += std::to_string(digits[i]);
   }

   std::cout << result << std::endl;
}

you can check if a string is numeric using this function

bool isNb(std::string str)
{
  if (str.size() == 0)
    return false;

  for (int i = 0; i < str.size(); i++)
  {
    if (std::isdigit(str.at(i)) == false)
      return false;
  }

  return true;
}