When a function ends are its local variables deallocated?

Question

If not does that mean that I would have to end each function by deleting all local variables if I wanted to prevent 100% of memory leak?

Answer 1

If you manually allocate memory you must deleted it whenever you need,

Example:

char* foo()
{
    char* manually_allocated_char  = new char(); // this will 'live' outside the function
    char  autamically_allocated    = 'a'; // this will be 'deleted'
    return manually_allocated_char;
}


void main()
{
    char* a_new_char = foo();
    delete a_new_char; // You must free memory you have allocated for not having memory leaks
}