/* 24/07/2021
   mathematicsv1

   Addition,
   how to make something run once in the main loop.
   importance of commenting code
   How integers can over run with addition

*/

int q;
int w;
int myAnswer;
long myLongAnswer;

void setup() {
  // Serial.begin(9600) starts serial communication. 9600bps bits per second = 1200 characters per second
  Serial.begin(9600);
  //Send script name
  Serial.println("mathematicsv1...");
  //this will print a blank line
  Serial.println(" ");

}

void loop() {
  if (q < 1) {
    //Example 1
    //add 1 to the value of q so the if statement will fail next time round
    q++;
    Serial.print("q = ");
    Serial.println(q);
    //Simple addition
    Serial.println("Simple addition");
    for (w = 0; w < 10; w++) {
      myAnswer =  w + q;
      Serial.print(" w =");
      Serial.print(w);
      Serial.print(" myAnswer =");
      Serial.println(myAnswer);
    }
    
    //Example 2
    //change the value of q to 32760
    q = 32760;
    Serial.println("Simple addition...The problem of overflowing the variable type");
    Serial.print("q = ");
    Serial.print(q);
    for (w = 0; w < 10; w++) {
      myAnswer =  w + q;
      Serial.print(" w =");
      Serial.print(w);
      Serial.print(" myAnswer =");
      Serial.println(myAnswer);
    }
    //Example 3
    q = 32760;
    Serial.println("Simple addition... 2 integers don't make a long");
    Serial.print("q = ");
    Serial.print(q);
    for (w = 0; w < 10; w++) {
      myLongAnswer =  w + q;
      Serial.print(" w =");
      Serial.print(w);
      Serial.print(" myLongAnswer =");
      Serial.println(myLongAnswer);
    }
    
    //Example 4
    q = 32760;
    Serial.println("Simple addition... 2 integers converted to a long");
    Serial.print("q = ");
    Serial.print(q);
    for (w = 0; w < 10; w++) {
      myLongAnswer =  long(w) + long(q);
      Serial.print(" w =");
      Serial.print(w);
      Serial.print(" myLongAnswer =");
      Serial.println(myLongAnswer);
    }

  }

}