This project is about building my own printf function.

//regular function
int is_even(int number);

//variadic function
int are_all_even(int n, ...);

To create a variadic function, we need the tools provided by the <stdarg.h> library. These tools will allow us to create a variadic function and manipulate the variadic number of arguments. I believe these functions will create and manipulate a singly linked list (although I have not confirmed, it makes a lot of sense). Among these tools, the most useful for this project are:

• va_start: Start the list of arguments, receiving two arguments: A variable from a type provided by the library: va_list and the last fixed argument.
• va_arg: Will return the current argument from the list, receiving two arguments: the variable that initialized the arguments list and the type that the current argument from the list should have.
• va_end: Will terminate the arguments list, freeing all the memory allocated in the list.