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#include <Servo.h>
 
Servo servo;//サーボのインスタンス
 
void setup() {
  Serial.begin(9600);
  servo.attach(3);
}
 
void loop(){
  if(Serial.available() > 0){  
    int rotate = (int)Serial.read();  
    servo.write(rotate);
   }
}
 

prog.cpp:1:19: error: Servo.h: No such file or directory
prog.cpp:3: error: ‘Servo’ does not name a type
prog.cpp: In function ‘void setup()’:
prog.cpp:6: error: ‘Serial’ was not declared in this scope
prog.cpp:7: error: ‘servo’ was not declared in this scope
prog.cpp: In function ‘void loop()’:
prog.cpp:11: error: ‘Serial’ was not declared in this scope
prog.cpp:13: error: ‘servo’ was not declared in this scope

Standard output is empty