请问为什么inputc可以重定向printf,可以重定向inputs吗？

yanandren

scanf之类的可以重定向吗？

int fputc(int ch, FILE *f)
{
  while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET) {}
    USART_SendData(USART1, ch);

  return(ch);
}


extern _ARMABI int fputc(int /*c*/, FILE * /*stream*/) __attribute__((__nonnull__(2)));
   /*
    * writes the character specified by c (converted to an unsigned char) to
    * the output stream pointed to by stream, at the position indicated by the
    * asociated file position indicator (if defined), and advances the
    * indicator appropriately. If the file position indicator is not defined,
    * the character is appended to the output stream.
    * Returns: the character written. If a write error occurs, the error
    *          indicator is set and fputc returns EOF.
    */
extern _ARMABI int fputs(const char * __restrict /*s*/, FILE * __restrict /*stream*/) __attribute__((__nonnull__(1,2)));
   /*
    * writes the string pointed to by s to the stream pointed to by stream.
    * The terminating null character is not written.
    * Returns: EOF if a write error occurs; otherwise it returns a nonnegative
    *          value.
    */

yanandren

自顶一下
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