GCC一直以来支持可变参数宏,并且使用不同的语法来允许为这些可变参数定义一个名字,就像任何其他参数一样。这里有一例子: #definedebug(format, args...) fprintf (stderr, format, args) 这个例子在各个方面都与上面的ISO C例子等价,但更具可读性和描述性。 GNU CPP提供两种进一步的可变宏扩展,以允许使用上面的...
To call a function with a variable number of arguments, simply specify any number of arguments in the function call. An example is the printf function from the C run-time library. The function call must include one argument for each type name declared in the parameter list or the list of...
then [tt]argc[/tt] is the number of arguments passed, plus one for the command name. Upvote 0 Downvote May 10, 2005 #3 sidhujay Programmer May 10, 2005 2 US hi you can use <stdarg.h> header file for variable argument passing to c/c++ program,and macros you will have to use...
It should be noted that the functionaverage()has been called twice and each time the first argument represents the total number of variable arguments being passed. Only ellipses are used to pass variable number of arguments. Print Page
You may be thinking, no problem, C# can cope with a variable number of arguments using its "params" keyword, which leads you to try the following code. using System; using System.Text.RegularExpressions; class Test { static void Main() { string str = "1 + 2 = ...
All the arguments specified in the function call are placed on the stack unless the __fastcall calling convention is specified. The number of parameters declared for the function determines how many of the arguments are taken from the stack and assigned to the parameters. You are responsible for...
(Reference: The C programming Language by K & R) Lets know the printf in detail. The prototype of printf() is: int printf(char *format, arg1, arg2, ...); printf converts, formats, and prints its arguments on the standard output. It returns the number of characters printed. The ...
Variable Numbers of Arguments Lisp, Python, and C and its descendants are unusual in that they allow the user to define subroutines that take a variable number of arguments. Examples of such subroutines can be found in Section 7.9.3: the printf and scanf functions of C's stdio I/O library...
memsize-types, are dangerous for the functions with the variable number of arguments. PVS-Studio static analyzer warns the programmer about such types with the help of the V111 diagnostic warning.If the types of the arguments have not changed their sizes, the code is considered correct and no ...
Suppose lastarg is the last named parameter of a function f with a variable number of arguments. Then declare within f a variable of type va_list that will point to each argument in turn: va_list ap; ap must be initialized once with the macro va_start before any unnamed argument is ...