C : write a function doesn't know how many parameter

Question

When learning C I see that printf can receive many arguments as it is passed.

And I don't know how C can implement a function like this, where the user can type as many parameters as the user wants. I have thought about pointers, too but still have no bright idea. If anyone has any ideas about this type of function, please tell me.

Answer 1

You need to use va_args, va_list and the like. Have a look at this tutorial. http://www.cprogramming.com/tutorial/c/lesson17.html

That should be helpful.

Answer 2

You have to use the ... notation in your function declaration as the last argument.

Please see this tutorial to learn more: http://www.cprogramming.com/tutorial/c/lesson17.html