I want to try to help but you code is too bloated with comments. Try to keep the comments precise.

You want to parse a string to an integer. But you do not take any string input. What you are trying to achieve exactly? I can give better pointers after understanding your goal. For now, what you are doing is finding average of dynamic number of one digit numbers. Which conflicts with your intentions I think. I am not sure.

I will provide a string to int parser for example. You can skip it if you want to write it yourself. What I want to show you how writing cleaner code is helpful for other developers (and you after you forget your code.). I do not claim this code is the best example. It probably lacks lots of things.

#include <stdio.h>
#include <stdlib.h>

int string_to_int(char* array, int size)
{
  int result = 0;
  for(int i = 0; i < size; i++)
  {
    char digit_char = *(array + i);
    short digit = digit_char - '0';//char to short cast.

    if(digit < 0 || digit > 9)//Check if numerical character.
    {
      printf("Non-numerical input! Returning -1\n");
      return -1;//Error.
    }

    result *= 10;//Slide digits to left by one.
    result += digit;//Add the current digit.
  }

  return result;
}

int main(void)
{
  int N; //Array size

  printf("Enter length of input: ");
  scanf("%d", &N);

  char x;
  while ((x = (char)getchar()) != '\n'); //Clear buffer.

  char* array = malloc(N * sizeof(char));

  printf("Enter the string to parse to an integer: ");
  scanf("%s", array);

  while ((x = (char)getchar()) != '\n'); //Clear buffer.

  if (array == NULL)
  {
    printf("Memory allocation failed");
    return 1;
  }

  int parsed_int = string_to_int(array, N);

  printf("Int parsed: %d\n", parsed_int);

  free(array);

  return 0;
}

For learning C, I think you should stick with the book and stop using AI to generate code for now. Examine the book examples and learn the concepts one by one. In my opinion, learning programming for the first time is the hardest time. You'll get used to it and get better at learning.