Help with using Arrays with While loop and sentinel value in C

[welchbs]

#include<stdio.h>
#include<stdlib.h>
#define SIZE 50
main()
{
	int value = 0, num[SIZE] = { 0 };
	int i = 0;


	printf("Enter up to 50 numbers. (enter -999 to stop)\n");
	
	while (num[i] != -999 || value != 50)
	{
		scanf_s("%i", &num[i]);
		value++;
		printf("Enter a new number.\n");
	}


	for (i = 0; i < SIZE; i++)
	{
		printf("%i\n", num[i]);
	}




	system("pause");
}

i am having trouble getting my Array to work with the sentinel values i have placed in the while loop. the user is supposed to be able to input up to 50 numbers or type -999 to end the program and then the program outputs all the numbers entered; neither of the sentinel values i have placed are working though and i'm not sure why i would appreciate any kind of help or nudge in the right direction.

[Salem]

> scanf_s("%i", &num[i]);
> value++;
Your index never increments.