Question

PHP has a func_get_args() for getting all function arguments, and JavaScript has the functions object.

I’ve written a very simple max() in C

int max(int a, int b) {
    
    if (a > b) {
        return a;   
    } else {
        return b;
    }
}

I’m pretty sure in most languages you can supply any number of arguments to their max() (or equivalent) built in. Can you do this in C?

I thought this question may have been what I wanted, but I don’t think it is.

Please keep in mind I’m still learning too. 🙂

Many thanks.

Answer 1

You could write a variable-arguments function that takes the number of arguments, for example

#include <stdio.h>
#include <stdarg.h>

int sum(int numArgs, ...)
{
    va_list args;
    va_start(args, numArgs);

    int ret = 0;

    for(unsigned int i = 0; i < numArgs; ++i)
    {
        ret += va_arg(args, int);
    }    

    va_end(args);

    return ret;
}    

int main()
{
    printf("%d\n", sum(4,  1,3,3,7)); /* prints 14 */
}

The function assumes that each variable argument is an integer (see va_arg call).