Thread: Structs in C

Hi,
I am trying to do the following:

Code:

typedef struct _STRUCT1
{
        integer var1[SIZE];

} STRUCT1

typedef struct _STRUCT2
{
       STRUCT1 var2(100);
       STRUCT1 var3(200);
} STRUCT2

I want that var2.var1 will have the array size=100
and var3.var1 will have the array size=200;
is it posible, or must i do this:

Code:

typedef struct _STRUCT1
{
        integer var1[100];

} STRUCT1

typedef struct _STRUCT3
{
        integer var1[200];

} STRUCT3

typedef struct _STRUCT2
{
       STRUCT1 var2;
       STRUCT3 var3;
} STRUCT2

have you compiled and see it yourself? tho i saw some problems with your struct definition

Code:

typedef int hun1[100];
typedef int hun2[200];

typedef struct _MYSTRUCT
{
    hun1 var1;
    hun2 var2;
} MYSTRUCT;

obvious that It's not working..
it was just an hypothetical example.

I am trying to do this now:

Code:

#define MACRO1(_SIZE,_NAME)    struct _NAME        \
                                                     {                                        \
                                                           INT32   var1[_SIZE];    \
                                                      }; 


typedef struct _STRUCT2
{
       MACRO1(100,var2)
       MACRO1(200,var3)
} STRUCT2

maybe struct templates?
any ideas?

Code:

#define MACRO1(_SIZE,_NAME) int _NAME[_SIZE];

typedef struct _STRUCT2
{
    MACRO1(100,var2)
    MACRO1(200,var3)
} STRUCT2;

its just not possible to have 1 type representing 2 different sizes. other means are needed here.
What would sizeof(struct _NAME) be?

Originally Posted by quzah

Look at the macro again. "_NAME" isn't a struct. It's the name of the variable you want your array to be called. Were I to use this, I'd probably reverse the arguments, but that's just me.


Quzah.

ah, I was responding to amitbern's post where _NAME is a struct. Theres many options to do this, but having 1 struct with 2 different sizes is just not one of them.