withdraw when approached

Projects Programming
1

Hi, I'm new in robotics, start with an Arduino Uno, and can't find my error in my program:

//Arduino Uno goes backward when you approach at the front
//Ultrasound Sensor 1 (beam 60o) mounted at the front and in Mode 2 (automatic)
//PWMUS1 is input US 1 (lateron I want more sensors), DCLpin = relay left motor, DCRpin = relay right motor
//KAwaarde is value to determine whether the approacher is at less than 1 meter
int PWMUS1 = 4;
int DCLpin = 5;
int DCRpin = 6;
int KAwaarde8;

void setup()
{
Serial.begin(9600); //Serie zetten op 9600 bytes per sec

pinMode (PWMUS1, INPUT);
pinMode (DCLpin, OUTPUT);
pinMode (DCRpin, OUTPUT);

}

void loop ()
{
int KAwaarde8;

KAwaarde8 = analogRead(PWMUS1);

{
if KAwaarde8 <= 51
int motorBackward();
digitalWrite(DCLpin, HIGH);
digitalWrite(DCRpin, HIGH);

delay (1000);
}
}

It keeps saying:

sketch_mar26a.cpp: In function 'void loop()':
sketch_mar26a:26: error: expected `(' before 'KAwaarde8'

What's wrong, someone can help me?

2

if (KAwaarde8 <= 51) {
motorBackward();

Then you'll get an error about an undefined function motorBackward, which you haven't shown us.

Be aware that you have a local variable KAwaarde8 and a global one of the same name.
This may cause you problems elsewhere.

3

thanks, it's working now !! , I used your '()' but also had to add 'int' before motorBackward

4

but also had to add 'int' before motorBackward

It is best not to declare functions where you use them.
Move it out.
The compiler will provide a prototype for it.