macro « struct « C Data Type Q&A

1. is there a simple way (macro?) to tell structure alignment?    stackoverflow.com

I understand the structure alignment is 'implementation specific', but just wondering if there is any simple way to calculate the structure alignment, for example:

typedef struct
{
    char c;
  ...

2. What is the logic behind defining macros inside a struct?    stackoverflow.com

As apparent in the title, I'm questioning the reason behind defining the macros inside a struct. I frequently see this approach in network programming for instance following snippet:

struct sniff_tcp {
  ...

3. Help with 2 C macros    stackoverflow.com

I've defined 2 macros:

#define HCL_CLASS(TYPE) typedef struct TYPE { \
                      ...

4. Struct initialisation through macro overuse    stackoverflow.com

I've got some structs to initialise, which would be tedious to do manually. I'd like to create a macro that will help me with it... but I'm not sure C preprocessor ...

5. C macro concatenation to create a struct    stackoverflow.com

I'm trying to create a macro to automate the creation of accessors for different types of variables in a simple "database" in C. This is done via a struct:

typedef struct ...

6. Is there a C preprocessor macro to print out a struct?    stackoverflow.com

As far as I can tell, there's no way to print out a struct value in C. ie, this doesn't fly:

typedef struct {
    int a;
    double ...

7. C - Macro problem with nested structures    bytes.com

8. offsetof macro and non-POD structures. Solution.    bytes.com

Pawel Hallo group members. //p1.cpp #include #include struct Person { int m_age; char* m_name; }; struct Child: public Person { unsigned short m_school_year; }; int main() { printf ("offset to m_name: %d\n", offsetof(Child, m_name)); printf ("offset to m_length: %d\n", offsetof(Child, m_school_year)); } As You know the program above compiles with a warning: prompt$ g++ -g -O0 -o /tmp/p1 p1.cpp ...