ask $3$: Add a new Post

$//$ Adds a new post in the posts array of pointers. $//$ This function takes as input: $//1)$ the posts array $//2)$ the post id $//3)$ the content of the post $//4)$ the posts array size $//$ And works as follows: $//1)$ If the post exists $($there is a post with the post$\_$id$),$ return false. $//2)$ Otherwise: $//$ a$)$ if there is empty space: $//$ i$)$ Insert the post $($in the next empty cell$)//$ ii$)$ return true. $//$ b$)$ Else: $//$ i$)$ Double the array size $($e$.$g$.,$ if the array has size $16,$ then increase it to size $32)$ and then add the post $//$ ii$)$ return true. bool add$\_$post$($Post $**$&posts$\_$array, const unsigned int pid, const char content$[$MAX$\_$CHAR$\_$NUM$],$ unsigned int &posts$\_$array$\_$size$)\{//$ TODO: Write code to implement add$\_$post return false; $\}$

For example, here are some examples of post insertion steps:

Example $1$: The posts$\_$array is empty and contains two entries

Example $2$: Add new post

Example $3$: Add new post

Example $4$: Increase the size of post array and Add new post