initializer element is not a constant

Altera_Forum · ‎09-06-2006

How can I get rid of the following error: initializer element is not a constant?

I use NIOS II IDE in the C programming language.

Before I had the code:

# define ip1 134# define ip2 35# define ip3 134# define ip4 112

.

const struct ip_settings eth_ip =

{

interfacetype, ((UINT32) ip4<<24 | ((UINT32) ip3 <<16) | ((UINT32)ip2<<8) |((UINT32) ip1 <<0))

}

---

Now I want to reload the values for ip1, ip2,ip3 and ip4 during operation.

So I put:

int ip1 = 134;

int ip2 = 35;

int ip3 = 134;

int ip4 = 112;

instead of the defines.

Compiling this leads to the error "initializer element is not a constant" http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/sad.gif How do I get around without this error message?

Thanks for your help in advance.

andy

Altera_Forum · ‎09-06-2006

--- Quote Start ---

originally posted by andy@Sep 6 2006, 03:18 PM

how can i get rid of the following error: initializer element is not a constant?

i use nios ii ide in the c programming language.

before i had the code:

# define ip1 134# define ip2 35# define ip3 134# define ip4 112

.

const struct ip_settings eth_ip =

{

interfacetype, ((uint32) ip4<<24 | ((uint32) ip3 <<16) | ((uint32)ip2<<8) |((uint32) ip1 <<0))

}

---

now i want to reload the values for ip1, ip2,ip3 and ip4 during operation.

so i put:

int ip1 = 134;

int ip2 = 35;

int ip3 = 134;

int ip4 = 112;

instead of the defines.

compiling this leads to the error "initializer element is not a constant" http://forum.niosforum.com/work2/style_emoticons/<#emo_dir#>/sad.gif how do i get around without this error message?

thanks for your help in advance.

andy

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--- quote end ---

--- Quote End ---

look at the "const" before your variable inistialization.

Altera_Forum · ‎09-06-2006

I assume you are using C not C++? A quick test showed that it should work in a *.cpp file but not in a *.c file. If you really want to get rid of the defines you could use something like

enum ip {
  ip1 = 134,
  ip2 = 35,
  ip3 = 134,
  ip4 = 112
};