<p>Say I have a C function which takes a variable number of arguments: How can I call another function which expects a variable number of arguments from inside of it, passing all the arguments that got into the first function?</p>

<p>Example:</p>

<pre><code>void format_string(char *fmt, ...);

void debug_print(int dbg_lvl, char *fmt, ...) {
    format_string(fmt, /* how do I pass all the arguments from '...'? */);
    fprintf(stdout, fmt);
 }
</code></pre>

To pass the ellipses on, you initialize a
```
va_list
```
as usual and simply pass it to your second function. You don't use
```
va_arg()
```
. Specifically;
```
```
void format_string(char *fmt,va_list argptr, char *formatted_string);

void debug_print(int dbg_lvl, char *fmt, ...) 
{    
 char formatted_string[MAX_FMT_SIZE];

 va_list argptr;
 va_start(argptr,fmt);
 format_string(fmt, argptr, formatted_string);
 va_end(argptr);
 fprintf(stdout, "%s",formatted_string);
}
```
```