#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <time.h>
struct IntArrayStr{
  int *data;
  size_t length;
  size_t capacity;
};

void read_int_array_str(struct IntArrayStr *in_str) {
  for (size_t i = 0; i < in_str->length; i++) {
	printf("digit:%zu = %d\n", i, in_str->data[i]);
  }
}

struct IntArrayStr *create_int_array_str(size_t in_capacity) {
  struct IntArrayStr *mystr = malloc(sizeof(struct IntArrayStr));	//allocate memory for struct

  mystr->data = malloc(sizeof(int) * in_capacity);					//make sure the pointer in the struct points to the array
  mystr->length = 0;												//forgot to actually assign a value to the struct
  mystr->capacity = in_capacity;
  
  if (mystr->data == NULL) {
	exit(0);
  }

  return mystr;
}

/* push value to struct, also handle realloc */
void push_int_array_str(int in_int, struct IntArrayStr *in_str){
  if (in_str->length == in_str->capacity) {						//check if already full
    in_str->capacity*=2;										//if so we should double
	printf("intarray capacity is now:%zu\n", in_str->capacity);
	int *temp;													//create a temporary pointer 
    temp = realloc(in_str->data, sizeof(int)*in_str->capacity); //realloc the data into a new bucket
	if(temp == NULL){exit(0);};									//check if actually valid
	in_str->data = temp;										//if valid, make sure the pointer in the struct points to the realloced block
  }
  in_str->data[in_str->length] = in_int;
  printf("number:%zu = %d\n", in_str->length, in_str->data[in_str->length]);
  in_str->length++; //didn't read the flow when transferring and accidentally put this in the if block
  printf("intarray length is now:%zu\n", in_str->length);
  //also had an off-by-one error because I increased length before doing anything
}

int main() {
  srand(time(NULL));
  printf("input numbers:\n");

  struct IntArrayStr *myintarraystr = create_int_array_str(2);

  int input;
  size_t length = 10;
  
  while (input != -1) {
	scanf("%d", &input);
	push_int_array_str(input, myintarraystr);
  }

  read_int_array_str(myintarraystr);

  free(myintarraystr->data);
  free(myintarraystr);

  return 0;
}