想做一个检测到物体电机自动停转的程序

我就是阳光

本人菜鸟，所以对这个语言方面还有诸多不熟悉的地方，就大神检查一下，这应该是个很简单的程序，我不知道哪不对，反正就是不工作。
代码如下：

int yellowtrig = 8;
int blackecho = 9;
int distance = 0;

int motorPin1 = 3;
int motorPin2 = 4;


void setup(){
pinMode(yellowtrig, OUTPUT);
pinMode(blackecho, INPUT);
Serial.begin(9600);
}

void loop(){
{
digitalWrite(8,LOW);
delayMicroseconds(2);
digitalWrite(8,HIGH);
delayMicroseconds(10);
digitalWrite(8,LOW);
distance = pulseIn(9, HIGH);
distance = distance/58;
Serial.print(distance);
Serial.print("cm");
Serial.println(" ");
delay(1000);
}

if(distance <= 15){
digitalWrite(3,LOW);
digitalWrite(4,LOW);
}else{
digitalWrite(3,HIGH);
digitalWrite(4,LOW);
}
}

ChunYong

真心没看懂

绿林网页

这个编译过了？好像多个}吧

1. 
   
2. int TrigPin = 8;
   
3. int EchoPin = 9;
   
4. int motorPin1 = 3;
   
5. int motorPin2 = 4;
   
6. float distance = 0;
   
7. void setup(){
   
8.   pinMode(motorPin1, OUTPUT);
   
9.   pinMode(motorPin2, OUTPUT);   
   
10.   pinMode(TrigPin, OUTPUT);
    
11.   pinMode(EchoPin, INPUT);
    
12.   Serial.begin(9600);
    
13. }
    
14. void loop(){
    
15.   distance=MeasuringDistance();
    
16.   Serial.print(distance);
    
17.   Serial.print("cm");
    
18.   Serial.println(" ");
    
19.   if(distance <= 15){
    
20.     digitalWrite(motorPin1,LOW);
    
21.     digitalWrite(motorPin2,LOW);
    
22.   }
    
23.   else{
    
24.     digitalWrite(motorPin1,HIGH);
    
25.     digitalWrite(motorPin2,LOW);
    
26.   }
    
27.   delay(1000);
    
28. }
    
29. long MeasuringDistance() {  //测量距离 单位厘米
    
30.   long duration;
    
31.   digitalWrite(TrigPin, LOW);
    
32.   delayMicroseconds(2);
    
33.   digitalWrite(TrigPin, HIGH);
    
34.   delayMicroseconds(5);
    
35.   digitalWrite(TrigPin, LOW);
    
36.   duration = (pulseIn(EchoPin, HIGH))/29/2;
    
37.   return duration;
    
38. }
    

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