you have to calculate the number of appearences of a digit in a range of numbers. you have to create a function named "calculate_digit" which receives this parameters: initiation: the number that starts the range final: the number that ends the range digit: the digit requested by the user the function has to return the amount of appearences of the digit that the user said. you cant use for, only while

int calculate_digit(int initial, int final, int digit)
{
  int cont = 0;

  while (initial<=final)
  {
    int temp = initial;
    while (temp>0)
    {
      if (temp%10==digit)
      {
        cont++;
      }
      temp = temp/10;
    }
    initial++;
  }

  return cont;
}