#Include <Stdarg.h>
To declare a function that will use a variable number of arguments, you must make sure you have at least one defined argument in the argument list; that is, a specific argument with a name and type associated with it. You can have as many real arguments as you would like; you just have to have at least one.
To declare a function that will use a variable number of arguments, you must make sure you have at least one defined argument in the argument list; that is, a specific argument with a name and type associated with it. You can have as many real arguments as you would like; you just have to have at least one.
Following the last defined argument, you should place the C-symbol that
indicates your use of a variable number of arguments, the
ellipsis, or ... (three periods in a row).
An example would look like this:
type FunctionName ( defined_args,... )
type FunctionName ( defined_args,... )
You control the access of the variable arguments with the following
definitions/functions/macros provided. All of these
references must only appear inside the body of a function that will
have a variable number of arguments (as denoted by the ellipsis):
va_list varname;
va_list varname;
This is the name of a structure that will maintain the
information about the variable argument list, and it is
therefore used in each of the following functions/macros.
NOTE that the va stands for variable arguments.
And example might be:
va_list args;
va_start (varname, last_defined_arg;
This function initializes the processing of the variable
argument list. The first parameter corresponds to the variable
name you used when you defined the va_list structure.
The second parameter corresponds to the variable name of the
last defined argument in the argument list in the
function's definition.
This function must be called before you try to reference
any of the variable arguments. If it is called more than one
time inside a function, the processing of the list of variable
arguments will start over again at the first variable argument.
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