structure « header « C File Q&A

1. How to declare a structure in a header that is to be used by multiple files in c?    stackoverflow.com

If I have a source.c file and it uses a structure like

struct a
{ 
    int i;
    struct b
    {
    ...

2. We have C structures in header files and we want to have an XML schema generated from the header files    stackoverflow.com

I have a twenty year old legacy application and want to connect it to a web front end. I need to pass a rather large deeply nested data structure that ...

3. Should I put a structure delcaration in a header file?    cboard.cprogramming.com