sum +=va_arg( arguments,double);// Adds the next value in argument list to sum. va_end( arguments );// Cleans up the list returnsum / num;// Returns the average } intmain() { // this computes the average of 13.2, 22.3 and 4.5 (3 indicates the number of values to 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...
Average of 2, 3, 4, 5 = 3.500000 Average of 5, 10, 15 = 10.000000 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 argumen...
C - Access Global Variables Is exit() & return Statements are Same? C - Print Float Value C - Print Multiple Lines Using printf() C - Argument Index Specification C - Value Returned by scanf() C - Returned Values of printf() & scanf() What do 'lvalue' & 'rvalue' Mean Automatic ...
In the C Programming Language, the vprintf function writes a formatted string to the stdout stream using arg as the variable argument list.
/*C program to demonstrate example of Variable Arguments.*/ #include <stdio.h> #include <stdarg.h> /*find sum of numbers*/ int sum(int N, ...) { int loop, sum; va_list va; /*for argument list*/ va_start(va, N); /*init with number of arguments*/ /*access arguments & ...
C Language:va_arg function (Fetch Argument from Variable Argument List) In the C Programming Language, theva_arg functionfetches an argument in a variable argument list. The va_arg function updatesapso that the next call to the va_arg function fetches the next argument. You must call theva...
Value parameters come into existence upon invocation of a function. It is initialized with the value of the argument given in the invocation. function_params.c #include <stdio.h> int add(int, int); int main() { printf("%d\n", add(4, 5)); printf("%d\n", add(8, 9)); return ...
What's the difference: variable vs. argument? Although both variables and arguments hold values within a program, there are some key differences. Arguments are generally used when calling functions or methods, while variables store information that can then be used within those functions or methods...