guess.ino

#include <Keypad.h>
#include <LiquidCrystal.h>

LiquidCrystal lcd(13, 12, 11, 10, A0, A1);

const byte ROWS = 4;
const byte COLS = 4;
char keys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

byte rowPins[ROWS] = {A2, A3, 9, 8};
byte colPins[COLS] = {7, 6, 5, };

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS); 

int LCDROW = 0;
int RED = A5;
int GREEN = A4;
int BLUE = 2;

int randomNumber;
int inputNumber;
String inputString = "";
int playCount = 0;

void setup()
{
  lcd.begin(16,2);
  lcd.setCursor(0,0);
  lcd.print("GAME START");
  randomSeed(analogRead(5));
  
  
  Serial.begin(9600);
  pinMode(RED, OUTPUT);
  pinMode(BLUE, OUTPUT);
  pinMode(GREEN, OUTPUT);
  
  delay(1000);
  resetGame();
}

void loop(){
  char key = keypad.getKey();
    
  // Start game
  if(playCount == 0 && key != NO_KEY) {
    randomNumber = random(1,10);
    lcd.clear();
    lcd.print("Enter a number");
    lcd.setCursor(0,1);
    lcd.print("Between 1-10");
  }
  
  // Confirm input
  if(key>47 && key<58 && key != NO_KEY) {
    lcd.clear();
    lcd.print("Your guess: ");
    lcd.print(key);
    parseInt(key);
    lcd.setCursor(0,1);
    lcd.print("# to confirm");
  } 
  
  // Check input on confirm
  if(key == '#' && key != NO_KEY) {

    // Increment playCount
    playCount++;

    // Clear LCD and turn off all LED
    lcd.clear();
    resetLED();

    // Loading
    lcd.print("Let me check...");
    delay(1000);
    lcd.clear();

    // Evaluate input
    evaluateInput();
  }
  
  // No more chance
  if (playCount == 3) {
    lcd.clear();
    lcd.print("GAME OVER!");
    delay(1500);
    lcd.clear();
    lcd.print("The number was: ");
    lcd.setCursor(0, 1);
    lcd.print(randomNumber);
    delay(1000);
    resetGame();
  }
  
  
}


// Parse string to int
void parseInt(char key) {
  inputString += key;
  inputNumber = inputString.toInt();
} 


void evaluateInput(){
  
  // Input is less than secret
  if(randomNumber > inputNumber){    
    digitalWrite(RED, HIGH);
    displayChances();
  } 
  
  // Input is more than secret
  if(randomNumber < inputNumber){
    digitalWrite(BLUE, HIGH);
    displayChances();
  } 
  
  // Correct guess
  if(randomNumber == inputNumber){
    digitalWrite(GREEN, HIGH);
    lcd.print("It's Right");
    lcd.setCursor(0,1);
    lcd.print("Congrats");
    
    delay(1000);
    resetGame();
    
  }
  
  // Reset input for next guess
  inputString = "";
}

// Display chances left
void displayChances(){
  lcd.print("Sorry :)");
  delay(1000);
  lcd.clear();
  lcd.print(3 - playCount);
  lcd.setCursor(1,0);
  lcd.print(" more tries");
  delay(2000);
  lcd.clear();
  lcd.print("Try again");
}

// Reset game
void resetGame(){
  resetLED();
  playCount = 0;
  lcd.clear();
  lcd.print("Press to start");
  lcd.setCursor(0,1);
  lcd.print("*");
}

// Reset LED
void resetLED(){
  digitalWrite(GREEN, LOW);
  digitalWrite(BLUE, LOW);
  digitalWrite(RED, LOW);
}