vscanf

int vscanf(char * restrict format, va_list arg_ptr); 

The functions vscanf(), vfscanf(), and vsscanf() are functionally equivalent to scanf(), fscanf(), and sscanf(), respectively, except that the argument list has been replaced by a pointer to a list of arguments. This pointer must be of type va_list, which is defined in the header .

#include <stdio.h>
#include <stdarg.h>
 
  void get_message(char *format, ...)
  {
    va_list ptr;
 
    va_start(ptr, format);
 
    vscanf(format, ptr);
 
    va_end(ptr);
  }
 
  int main(void)
  {
 
    int i;
    printf("integer:");
    get_message(" %d ", &i);
 
    printf("%d", i);
 
    return 0;
  }