Useva_argmacro andva_listvariable to access each item in argument list. Use a macrova_endto clean up the memory assigned tova_listvariable. Example Let us now follow the above steps and write down a simple function which can take the variable number of parameters and return their average ...
http://www.cprogramming.com/tutorial/c/lesson17.html #include <stdarg.h>#include<stdio.h>/*this function will take the number of values to average followed by all of the numbers to average*/doubleaverage (intnum, ... ) { va_list arguments;doublesum =0;/*Initializing arguments to store...
C语言支持va函数,作为C语言的扩展--C++同样支持va函数,但在C++中并不推荐使用,C++引入的多态性同样可以实现参数个数可变的函数。不过,C++的重载功能毕竟只能是有限多个可以预见的参数个数。比较而言,C中的va函数则可以定义无穷多个相当于C++的重载函数,这方面C++是无能为力的。va函数的优势表现在使用的方便性和易...
Variable Argument Lists in C using va_listBy Alex Allain Perhaps you would like to have a function that will accept any number of values and then return the average. You don't know how many arguments will be passed in to the function. One way you could make the function would be to ...
one at a time as the loop cycles. Its second parameter is a Cdatatype; in this case,int. As we cycle the loop using va_arg(), we are actually moving through a series of sequential bytes on the stack. var_arg knows how many bytes are in an argument and how far to move after ea...
This week I'll talk about methods that take variable numbers of arguments, also known as variadic methods. I'll show you the Objective-C syntax and implementation, give a quick rundown of the ways that Cocoa classes provide variable argument support and
In the C Programming Language, the va_arg function fetches an argument in a variable argument list. The va_arg function updates ap so that the next call to the va_arg function fetches teh next argument.
Both prints out each argument passed to it. However, the first accepts variable arguments using the params keyword.code 复制 static void Print1(params int[] args) { foreach (int arg in args) { Console.WriteLine(arg); } } static void Print2(int[] args) { foreach (int arg in args...
This annoys me more than just about anything I see in Managed code. It's like a license to write sloppy code. Thethiskeyword has its place, but it shouldn't be abused to allow name reuse. I do see an argument for this when using it for Visual Studio Intellisense lookups, but I wo...
one argument = SQRT(A2) two arguments = ROUND(A2, 2) variable number = SUM(A1:A20) or = SUM(A1:A10,B3,B4) View chapterExplore book C Programming Essentials Martin P. Bates, in Programming 8-bit PIC Microcontrollers in C, 2008 Integers We have seen the integer (whole number) variable...