[libmicrohttpd] Can a C function can formatted print selected members of a struct array

[lingweicai]

Dear: 

I have a struct array, for example struct user { int id; char name[]; unsigned char age }; and array of the struct user with 100 records(items). 

I can write for a function for each selected members, but I want to write a function, with selected struct members as the function arguments, like a sql select to print a table. 

for example, general_fun (  struct user * user_array[100] , ... )   

if I want print qty 100 of user ID, I call general_fun ( array, id);

if I want to print qty 100 of user id and name, I call general_fun( array, id, name); 

are there these kind of functions in C ?

Thanks,

Forrest Ling