Arduino function can't edit array - c++

Question

Background
I've written an Arduino function which receives strings in the format "a,b,c,d,e" over a serial connection, where a,b,c,d,e are integers, and I'm trying to update an array with these integers every time a new string is received. The data is received and parsed into individual integers fine, but the array won't update properly.
Attempt
Below is the code, I've left the getData() function out as all it does is receive the string from the serial connection and store it in an array of characters input (that part is working fine).
void setup() {
Serial.begin(9600);
}
void loop() {
getData();
if(parsed == false){
parseData(readings);
}
}
void parseData(int readings[]) {
x = 0;
char * split;
split = strtok(input,",");
while (split != NULL)
{
readings[x] = split;
split = strtok (NULL, ",");
x++;
}
parsed = true;
}
Problem
If I send a string like "6,7,8,9,0", the array readings[] is updated to [289,291,293,295,297] no matter what values I send, I have checked what values split takes inside the function and they are correct, however the line readings[x] = split; fails to update the array elements to anything other than those 5 numbers in that order. This is the case when the value of readings[n] is checked inside or outside the parseData function.
Also, if I send fewer than 5 integers in the string, e.g. a,b,c, only the first array elements will change and the others will remain at 0, e.g. [289,291,293,0,0]
Before I found out about passing array pointers to functions, the exact same thing was happening with slightly different code - when I called the function in the loop, I just used parseData();, and when I defined the function I just used void parseData(){
Question
Why isn't the array updating properly and how can I fix it?

Answer 1

Your readings is an array of integers.
And split is a pointer-to-char.
The statement
readings[x] = split
stores split, which is the address of a character, as an integer value.
If I write
const char *pointer = "42";
int address = pointer;
I am not storing the integer value 42 in address - I'm storing the number identifying the memory location of the first character in my string.
If you want to convert a string into an integer, you need to parse it with a function like strtol.