va_arg打印随机字符

Question

我的打印功能使用va_arg函数打印随机字符。我无法弄清楚为什么它不起作用。感谢您的帮助！

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

int myprint(const char *str, ...) {
  va_list args;
  int counter = 0;
  va_start (args, str);
  while (*str) {
    if (*str == '&') {
      fputc(va_arg(args, int), stdout);
      counter++;
    } else {
      fputc(*str, stdout);
    }
    str++;
  }
  va_end(args);
  fputc('\0', stdout);
  return counter;
}

int main(void)
{
    myprint("Hello!\n");
    myprint("Number: &\n", 5);
    myprint("Number one: &, number two: &\n", 120, 1345);
    int ret = myprint("Three numbers: & & &\n", 12, 444, 5555);
    myprint("I just printed & integers\n", ret);

    return 0;
}