[LinLinLin]

PHP Code:

enum struct test
{
    int  type;
    char info[128];
    char file[128];
    char name[128];

    ArrayList looking;
}

ArrayList mytest = new ArrayList( sizeof(test) ); 


By reading and writing to this arraylist i am sure the code work well.
My question is why we can use sizeof to a enum struct which contain a arraylist? It's size is dynamic!

[little_froy]

an ArrayList(or more than 1) each is a cell as the variable. for a cell, you can use sizeof, just like C pointer, itself is always 4 or 8 byte, but it's unrelated to how many memory it allocated.