Error message on humidity sensor/ ultrasonic distance sensor program

Projects Programming
1

I have written a code for a project that will use the known distance to something and an ultrasonic distance sensor to record the speed of light. I have combined a known code for that with another code for the DHT11 humidity and temperature sensor. I am getting an error message which states: "error: expected initializer before 'const' ". Can someone help me with what the error is trying to say?

Here are all the error messages:

Science_Research_Code:7: error: expected initializer before 'const'
Science_Research_Code.ino: In function 'void setup()':
Science_Research_Code:17: error: 'trigPin' was not declared in this scope
Science_Research_Code.ino: In function 'void loop()':
Science_Research_Code:24: error: 'trigPin' was not declared in this scope
Science_Research_Code:41: error: 'DHT' was not declared in this scope
Science_Research_Code:41: error: 'DHT11_PIN' was not declared in this scope
Here is the code:

#include <dht.h>

dht DHT

#define DHT11_PIN 7

const int trigPin = 13; //Sensor Trip pin connected to Arduino pin 13
const int echoPin = 11; //Sensor Echo pin connected to Arduino pin 11
float pingTime;
float speedOfSound;
float distanceMeasurement;
int targetDistance = 6; //Distance to Target in cm, must input before running program

void setup() {
    //Put your setup code in here to run once
Serial.begin(9600);
     pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
}

void loop() {
//put your main code here to run repeatedly

digitalWrite(trigPin, LOW); //Set trigger pin low
delayMicroseconds(2000); //Let signal settle
digitalWrite(trigPin, HIGH); //Set trigger pin high
delayMicroseconds(2000); //delay in high state
digitalWrite(trigPin, LOW); //ping has now been sent

pingTime = pulseIn(echoPin, HIGH); //pingTime is presented in microseconds

distanceMeasurement = (343*100) * (pingTime/1000000)/2; //this is the distance that the computer calculates with adjusted speed of sound
speedOfSound = (targetDistance*2)/pingTime*(1000000)/100; //finds speed in m per s
       Serial.print("The Speed of Sound is: ");
Serial.print(speedOfSound);
Serial.println("m/s. ");
Serial.print("The measured distane is: ");
Serial.print(distanceMeasurement);
Serial.print("cm.");

int chk = DHT.read11 (DHT11_PIN);
Serial.print("Temperature = ");
Serial.println(DHT.temperature);
Serial.print("Humidity = ");
Serial.println(DHT.humidity);
delay(1000);
}

Science_Research_Code.ino (1.45 KB)

2 
#define DHT11_PIN7

You are missing something here. DHT11_PIN7 needs a value or should it be DHT11_PIN 7 ( the space matters)?

Please read the "how to use this forum-please read" stickies to see how to format and post code. Please include the entire text of any error messages (copy and paste) as the message(s) contains information on the location of the error.

3

Thank you @groundFungus!

I fixed the forum formatting and also edited the part you said. It is still giving me the error messages that I edited into the message.

4 
dht DHT

Need a semi colon after this. Like so.

dht DHT;
5

OMG. Thank you so much!!! That is literally the first thing they tell you to look for in programming classes. I can't believe I missed that.