Arduino Hangman program issue

Projects Programming
1

Hello I`m making a physical hangman game and have a problem with coding.

The machine has a 5 leds in x-row and 6 leds in y-row.
and has an alphabet chart like below.

0,a,b,c,0
d,e,f,g,h
i,j,k,l,m
n,o,p,q,r
s,t,u,v,w
0,x,y,z,0

If I pick the 3rd x-row led and 2nd y-row led, the letter 'f' will be selected.
The part that Im struggling with is how I can match the letters from Random String Words.. I think I need to use 'for loops' but still cant figure out.
Need some help.
Thank you.

String Words[] = {
"STEAK", "BURGER", "SUSHI", "FRIES", "CHIPS",
"BERRY", "MANGO", "MELON", "APPLE", "GRAPE"};

String GRAPE[] = {
"G", "R", "A", "P", "E"};

char letter1, letter2, letter3, letter4, letter5;

//x
int led1 = 3;
int led2 = 4;
int led3 = 5;
int led4 = 6;
int led5 = 7;

//y
int led6 = 8;
int led7 = 9;
int led8 = 10;
int led9 = 11;
int led10 = 12;
int led11 = 13;

int buttonX = 0;
int buttonY = 1;
int buttonEnter = 2;

int countX = 0, countY = 0;

int letterIndex = -1;
int wordIndex = 0;

void setup () {

pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
pinMode(led3, OUTPUT);
pinMode(led4, OUTPUT);
pinMode(led5, OUTPUT);

pinMode(led6, OUTPUT);
pinMode(led7, OUTPUT);
pinMode(led8, OUTPUT);
pinMode(led9, OUTPUT);
pinMode(led10, OUTPUT);
pinMode(led11, OUTPUT);

pinMode(buttonX, INPUT);
pinMode(buttonY, INPUT);
pinMode(buttonEnter, INPUT);

randomSeed(analogRead(0));
wordIndex = random(0,10);
}

void loop () {
/*
if( Words[ wordIndex ][ letterIndex + 1] == letter )
letterIndex ++;
if(letterIndex > 4){
(Words[ wordIndex ][ letterIndex + 1] == letter);
// success
}
*/

if(letter 1 == grape[0]) {
digitalWrite(led1, HIGH);
}
if(letter 2 == grape[1]) {
digitalWrite(led2, HIGH);
}
if(letter 3 == grape[2]) {
digitalWrite(led3, HIGH);
}
if(letter 4 == grape[3]) {
digitalWrite(led4, HIGH);
}
if(letter 5 == grape[4]) {
digitalWrite(led5, HIGH);
}

if(countX == 1){
if(countY == 1) {
letter = ' '; // nothing
}
else if(countY == 2) {
letter = 'D';
}
else if(countY == 3) {
letter = 'I';
}
else if(countY == 4) {
letter = 'N';
}
else if(countY == 5) {
letter = 'S';
}
else if(countY == 6) {
letter = ' '; // nothing
}
}

if(countX == 2 && countY == 1) {
letter = 'A';
}
if(countX == 2 && countY == 2) {
letter = 'E';
}
if(countX == 2 && countY == 3) {
letter = 'J';
if(countX == 2 && countY == 4) {
letter = 'O';
}
if(countX == 2 && countY == 5) {
letter = 'T';
}
if(countX == 2 && countY == 6) {
letter = 'X';
}

if(countX == 3 && countY == 1) {
letter = 'B';
}
if(countX == 3 && countY == 2) {
letter = 'F';
}
if(countX == 3 && countY == 3) {
letter = 'K';
}
if(countX == 3 && countY == 4) {
letter = 'P';
}
if(countX == 3 && countY == 5) {
letter = 'U';
}
if(countX == 3 && countY == 6) {
letter = 'Y';
}

if(countX == 4 && countY == 1) {
letter = 'C';
}
if(countX == 4 && countY == 2) {
letter = 'G';
}
if(countX == 4 && countY == 3) {
letter = 'L';
}
if(countX == 4 && countY == 4) {
letter = 'Q';
}
if(countX == 4 && countY == 5) {
letter = 'V';
}
if(countX == 4 && countY == 6) {
letter = 'Z';
}

if(countX == 5 && countY == 1) {
letter = ''; //nothing
}
if(countX == 5 && countY == 2) {
letter = 'H';
}
if(countX == 5 && countY == 3) {
letter = 'M';
}
if(countX == 5 && countY == 4) {
letter = 'R';
}
if(countX == 5 && countY == 5) {
letter = 'W';
}
if(countX == 5 && countY == 6) {
letter = ''; //nothing
}

//LED X movement
int count = 0;

if( digitalRead(buttonX) == HIGH) {
count ++;
countX += count;
digitalWrite(countX + led1, HIGH);
if(countX > 4){
countX = 0;
digitalWrite(led5, LOW);
}else
digitalWrite(countX - 1 + led1, LOW);
}

count = 0;
//LED Y movement
if(digitalRead(buttonY) == HIGH) {
count ++;
countY += count;
digitalWrite(countY + led5, HIGH);
if(countY > 5){
countY = 0;
digitalWrite(led11, LOW);
}else
digitalWrite(countY - 1 + led5, LOW);
}
}
}

//enter and check
if(digitalRead(buttonEnter) == HIGH) {

//match letters from Random String Words

}

//False feedback (LEDs blink for a second)
/* if(wrong == true) {
digitalWrite(, HIGH);
delay(5000);
}
/*
//True feedback (LED blinks 3 times)
if(wrong == false) {
digitalWrite(, HIGH);
delay(1000);
digitalWrite(, LOW);
delay(1000);
digitalWrite(, HIGH);
delay(1000);
digitalWrite(, LOW);
delay(1000);
digitalWrite(, HIGH);
delay(1000);
digitalWrite(, LOW);
delay(1000);
}
*/

2

If I pick the 3rd x-row led and 2nd y-row led, the letter 'f' will be selected.

But, none of your words contain the letter f. F, yes, but not f.

The part that I`m struggling with is how I can match the letters from Random String Words..

A random value will be generated. That value is an index into the Words array, selecting a String instance from the array.

While this is an interesting project, the use of the String class is completely unnecessary. Change the declaration of Words to be

char *Words[] =
{ 
  "STEAK", "BURGER", "SUSHI", "FRIES", "CHIPS",
  "BERRY", "MANGO", "MELON", "APPLE", "GRAPE"
};

Then, add another (global) variable:

char *word = NULL;

In setup, assign a valid value to word:

word = Words[wordIndex];

In loop, then, use can use strlen(word) to determine how many characters in the word, and a for loop to see if word[n] is the letter chosen.

You don't need GRAPE at all, or any of the code that deals with GRAPE.