arduino程序编译后提示expected unqualified-id before ‘while'

[qq_42531074]

const int moto1=2; const int moto2=3; const int moto3=4; const int moto4=5; const int moto5=6; const int moto6=7; const int moto7=8; const int moto8=9; char buff; void setup() { // put your setup code here, to run once: Serial.begin(9600); pinMode(moto1,OUTPUT); pinMode(moto2,OUTPUT); pinMode(moto3,OUTPUT); pinMode(moto4,OUTPUT); pinMode(moto5,OUTPUT); pinMode(moto6,OUTPUT); pinMode(moto7,OUTPUT); pinMode(moto8,OUTPUT); digitalWrite (moto1,LOW); digitalWrite (moto2,LOW); digitalWrite (moto3,LOW); digitalWrite (moto4,LOW); digitalWrite (moto5,LOW); digitalWrite (moto6,LOW); digitalWrite (moto7,LOW); digitalWrite (moto8,LOW); } while(1) { i=analogRead(8) a=analogRead(6) b=analogRead(7) digitalWrite (moto5,HIGH); digitalWrite (moto6,HIGH); digitalWrite (moto7,LOW); if(i>200) //有重物时时前进，即按钮按下，高电平 { if(a<100) //前壁障返回低电平时前进 { digitalWrite(moto1,LOW); digitalWrite(moto2,HIGH); digitalWrite(moto3,LOW); digitalWrite(moto4,HIGH); } else //前壁障返回高电平停止 { digitalWrite(moto1,LOW); digitalWrite(moto2,LOW); digitalWrite(moto3,LOW); digitalWrite(moto4,LOW); } } else //无重物时后退，即按钮松开，低电平 { if(b<100) //后壁障返回低电平时后退 { digitalWrite(moto1,HIGH); digitalWrite(moto2,LOW); digitalWrite(moto3,HIGH); digitalWrite(moto4,LOW); } else //后壁障返回高电平停止 { digitalWrite(moto1,LOW); digitalWrite(moto2,LOW); digitalWrite(moto3,LOW); digitalWrite(moto4,LOW); } } } void loop() { // put your main code here, to run repeatedly: if(Serial.available()>0) { buff=Serial.read(); } if(buff=='1')//停车 { digitalWrite(moto1,LOW); digitalWrite(moto2,LOW); digitalWrite(moto3,LOW); digitalWrite(moto4,LOW); } if(buff=='2')//前进 { digitalWrite(moto1,LOW); digitalWrite(moto2,HIGH); digitalWrite(moto3,LOW); digitalWrite(moto4,HIGH); } if(buff=='3')//后退 { digitalWrite(moto1,HIGH); digitalWrite(moto2,LOW); digitalWrite(moto3,HIGH); digitalWrite(moto4,LOW); } if(buff=='4')//左转 { digitalWrite(moto1,HIGH); digitalWrite(moto2,LOW); digitalWrite(moto3,LOW); digitalWrite(moto4,LOW); } if(buff=='5')//右转 { digitalWrite(moto1,LOW); digitalWrite(moto2,LOW); digitalWrite(moto3,HIGH); digitalWrite(moto4,LOW); } }