I am unable to implement pointers in this code

Question

I am asked to use the pointers provided in the functions' prototypes, but I don't know how to use them in this case. Here's the link to my code:
https://code.sololearn.com/c1a90A1A11a3

This code is error-free.

Answer 1

The code has lot of errors.
Function calling is in wrong way..
Ex:
void print(int i); //this is function prototype

int main()
{
int j=12345;
print(j); //this is calling function
}

//this is function definition or implementation
void print(int i )
{
printf("%d", i);
}

Observe how it is used.
In your code, you function calling is wrong way.. and all passed variables must be declared and initialized before passing to function..

For 1st one :

calculate_mean(temperatures, N, &mean);

Here you must initialize N, mean .
Do the same for next one...

Answer 2

I can correct it but this looks like you are trying to implement something you didn't even try.

You are assuming and passing wrong arguments , defining a function in main instead of calling it. It's not just about "pointers" . can you maybe go through basics of C again ?

Obviously i will correct it later on or someone else will for you.