c - Mindstorms 的 Robotc **错误** :Undefined variable 'sonarSensor' . 假设为 'short'

Question

理论上，这段代码应该永远循环，直到声纳传感器检测到高于 10 厘米的值，但是当我尝试编译此程序时，会出现消息

错误:

Undefined variable 'sonarSensor'. 'short' assumed. I'm not sure why it does not see that sonar has been initialized.

代码:

//Program: Bridge Layer
//Date: 12/14/19

#pragma config(Sensor, S4, sonar, sensorSONAR); //Enable sonar to sensor pin 4 on the NXT

task main()
{
    int distance_in_cm = 10; //Initialize sensor value variable
    while(SensorValue[sonar] < distance_in_cm){ //Creat a loop checking if the sonar sensor ever sees a value above 10 cm's
        motor[motorB]= 50;  //Start motor B forwards att 50% power
        motor[motorC]= 50;  //Start motor C forwards att 50% power
    }
    motor[motorB]= 50;  //Stop motor B
    motor[motorC]= 50;  //Stop motor C
}

Answer 1

好吧，我现在很好，我发现您必须完成配置向导并设置声纳传感器的端口和类型。谢谢您的帮助。