// MAIN.C____________________________________________________________

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

int main(int argc, char **argv) {
    Array arr = init_arr(5);
    for (int i = 0; i < arr.length; i++) {
        arr.n[i] = i;
    }
    print_arr(arr); // prints 0 1 2 3 4
    add_to_arr(&arr, 228);
    print_arr(arr); // prints 0 1 2 3 4 228
    remove_from_arr(&arr, 0);
    print_arr(arr); // prints 1 2 3 4 228
    free_arr(arr);
    // ? free_arr_IDK(arr.n);
    // ? free(arr.n);
    print_arr(arr); // ??? prints 1 2 3 4 228
}

// FUNC.C______________________________________________________________
#include <stdio.h>
#include <stdlib.h>
#include "myheader.h"

Array init_arr(int size) {
    int i;
    Array a;
    a.length = 0;
    a.n = (int*) malloc(size * sizeof(int));
    for (i = 0; i < size; i++) {
        a.n[i] = 0;
        a.length++;
    }
    return a;
}

void print_arr(Array a) {
    int i;
    printf("Array size: %d {", a.length);
    for (i = 0; i < a.length; i++) {
        printf("%d ", a.n[i]);
    } printf("}\n");
}

void free_arr(Array a) {
    free (a.n);
}

void free_arr_IDK(Array *a) {
    free (a->n);
}

void add_to_arr(Array *arr, int n) {
    arr->length++;
    arr->n = (int*) realloc(arr->n, arr->length * sizeof(int));
    arr->n[arr->length-1] = n;
    printf("-- added <%d> to end of array\n", n);
}

void remove_from_arr(Array *arr, int id) {
    int i, *temp;
    temp = (int*) malloc(arr->length * sizeof(int));
    for (i = 0; i < arr->length; i++) {
        temp[i] = arr->n[i];
    }
    arr->length--;
    arr->n = (int*) malloc (arr->length * sizeof(int));
    for (i = 0; i < id; i++) {
        arr->n[i] = temp[i];
    }
    for (i = id; i < arr->length; i++) {
        arr->n[i] = temp[i+1];
    }
    free(temp);
    printf("-- removed element #%d\n", id);
}

// MYHEADER.H _____________________________________________________________
typedef struct Array {
    int length;
    int *n;
} Array;

Array init_arr(int);
void print_arr(Array);
void free_arr(Array);
void free_arr_IDK(Array*);
void add_to_arr(Array*, int);
void remove_from_arr(Array*, int);