Address of Structure element, and struct malloc

Hi there,

I have 2 questsions:

1) How can I access the address of an element of a structure?

I'm trying to do some basic TCP server things, and I have the following struct defined:

Code:

---

struct clients
{
        char *name;
        char ip[IP]; /*12 digits, 3 '.' and a null character, is the max length of an IP*/
        int new_sd;
        struct sockaddr_in client;
        int client_len;

};
typedef struct clients Clients;

---

and then I am trying to do something like this:

Code:

---

int clientCount = 0; /*Keep track of the number of clients connected*/
Clients *clientTable; /*Memory will be dynamically allocated here, as clients connect*/
...
clientTable[clientCount -1].&client = &temp_client;

---

but I get a syntax error before the & token. I have tried various combinations of brackets, including the & at the beginning followed by brackets, etc.., and cannot get this to compile.
(Note: The -1 is because clientCount is the real number of clients connected. So if 1 client is connected, the actual structure that exists is at clientTable[0])

2) I have an array of these structures, and when I try to book off each element of the array, ie something like:

Code:

---

clientTable[clientCount -1] = (Clients)malloc(sizeof(Clients));

---

I get "error: conversion to non-scalar type requested".

Do I not have to malloc memory for this structure? Is it considered already malloc'd just by its creation?

Thanks very much for the help!

Quote:

---

Originally Posted by HellsChicken

and then I am trying to do something like this:

Code:

---

clientTable[clientCount -1].&client = &temp_client;

---

but I get a syntax error before the & token.

---

Perhaps you mean for the client member to be a pointer. You certainly can't reassign a variable's address.

Quote:

---

Originally Posted by HellsChicken

2) I have an array of these structures, and when I try to book off each element of the array, ie something like:

Code:

---

clientTable[clientCount -1] = (Clients)malloc(sizeof(Clients));

---

I get "error: conversion to non-scalar type requested".

---

If using C, just get rid of the cast. Then make sure that you are malloc'ing to a pointer of the correct type.

Use the preferred form and save yourself headaches:
FAQ > Explanations of... > Casting malloc