数组下标的无效类型'uint8_t {aka unsigned char} [int]'

Question

我从YouTube视频中复制了一个脚本，因为没有脚本的下载链接，但现在我总是得到相同的错误消息，我不知道该怎么做。你能帮帮我吗？

这是我的代码：

#include <VirtualWire.h>

int ledPassive = 5;
int ledActive = 7;
int motor = 8;

void setup() {
  // put your setup code here, to run once:
pinMode(ledPassive,OUTPUT);
pinMode(ledActive,OUTPUT);
pinMode(motor,OUTPUT);
vw_set_ptt_inverted(true);
vw_set_rx_pin(12);
vw_setup(4000);
vw_rx_start();

}

void loop()
{
  
digitalWrite(ledPassive,HIGH);
digitalWrite(motor,LOW);
digitalWrite(ledActive,LOW);
uint8_t buf(VW_MAX_MESSAGE_LEN);
uint8_t buflen = VW_MAX_MESSAGE_LEN;

if (vw_get_message(buf, &buflen)) {
  if (buf[0]=='X'){
    digitalWrite(ledPassive,LOW);
    for (int i=0;i<10;i++){
      digitalWrite(motor,LOW);
      digitalWrite(ledActive,HIGH);
      delay(200);
      digitalWrite(motor,HIGH);
      digitalWrite(ledActive,LOW);
      delay(200);
    }
}
  else if (buf[0]!='x'){
    digitalWrite(ledPassive,HIGH);
  }
}
}

这是错误消息：

Arduino: 1.6.10 (Windows 10), Board:"Arduino Nano, ATmega328"

In function 'void loop()':

sketch_aug18e_self_made:29: error: invalid types 'uint8_t {aka unsigned char}[int]' for array subscript

   if (buf[0]=='X'){

            ^

sketch_aug18e_self_made:40: error: invalid types 'uint8_t {aka unsigned char}[int]' for array subscript

   else if (buf[0]!='x'){

                 ^

exit status 1
invalid types 'uint8_t {aka unsigned char}[int]' for array subscript

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

对不起，我的荷兰语不好，而且英语不太好

Answer 1

尝试替换

uint8_t buf(VW_MAX_MESSAGE_LEN);

与

uint8_t buf[VW_MAX_MESSAGE_LEN];

您使用不正确的语法来声明数组。