I need help with this project

#include <Wire.h> //
#include <SparkFunSX1509.h> //
#include <FastLED.h>

int wrong =0;
int extra =0;
int count =0;
int i, H=0, T=0 , Z=0 ,key;
char LEDpins[5][5]= {
{'a','b','c','d','e'},
{'f','g','h','i','j'},
{'k','l','m','n','o'},
{'p','q','r','s','t'},
{'u','v','w','x','y'},
};

int randomNumber[5]; //a variable to hold a random number

const byte SX1509_ADDRESS = 0x3E; // SX1509 I2C address (00)
SX1509 io; // Create an SX1509 object

#define KEY_ROWS 5
#define KEY_COLS 5

// Handy array we'll use to map row/column pairs to
// character values:
char keyMap[KEY_ROWS][KEY_COLS] = {
{'a','b','c','d','e'},
{'f','g','h','i','j'},
{'k','l','m','n','o'},
{'p','q','r','s','t'},
{'u','v','w','x','y'},
};

// ARDUINO pin 2 connected to SX1509 interrupt
#define INTERRUPT_PIN 2

#define LED_PIN 7
#define NUM_LEDS 25
CRGB leds[NUM_LEDS];

const int buzzer = 7; //buzzer to arduino pin 7

void setup() {

randomSeed(analogRead(A0)); //generate a random seed

Serial.begin(9600); //start serial communication

// What is all these line below for?
/////////////////////////////////////////////////////////////////////////
for (int a=0; a<5; a++)
{
pinMode(LEDpins[a],OUTPUT); //set LED as output
}

for (int b=0; b<5; b++)
{
pinMode(LEDpins[b],OUTPUT); //set LED as output
}
uint8_t x[25];
for (size_t i = 0; i < 25; i++) x[i] = i+1;

for (size_t i = 0; i < 25; i++)
{
size_t j = random(i, 25);

// swap x[i] and x[j]
auto t = x[i];
x[i] = x[j];
x[j] = t;
}
////////////////////////////////////////////////////////////////////////

if (!io.begin(SX1509_ADDRESS))
{
Serial.println("Failed to communicate.");
while (1);
}

// defining scan time, debounce time, and sleep time:
// Sleep time range: 128 ms - 8192 ms (powers of 2) 0=OFF
unsigned int sleepTime = 0;
// Scan time range: 1-128 ms, powers of 2
byte scanTime = 32 ; // Scan time per row, in ms
// Debounce time range: 0.5 - 64 ms (powers of 2)
byte debounceTime = 64; // Debounce time
io.keypad(KEY_ROWS, KEY_COLS, sleepTime, scanTime, debounceTime);

// Set the ARDUINO pin as an input, to monitor the interrupt
pinMode(INTERRUPT_PIN, INPUT_PULLUP);
Serial.println("Row | Col | Key");6;

FastLED.addLeds<WS2812, LED_PIN, GRB>(leds, NUM_LEDS);

pinMode(buzzer, OUTPUT); // Set buzzer - pin 7 as an output
} //End of void setup

void loop() {

// 1. Generate random lights on the LED
FastLED.clear();
for (i=0; i<5; i++)
{

randomNumber[i] = (random(0,24));
leds[randomNumber[i]] = CRGB(10, 10, 10);
delay(50);

}
FastLED.show();

// KP: Print out the random numbers you generated to check
for (i=0; i<5; i++)
{
Serial.println(randomNumber[i]);
}

// 2. Clear the lights and start the games
delay(6000);
FastLED.clear(); //
FastLED.show();

wrong=0;


while( count<5 && wrong==0)
{

 // 3. Read
    // If the interrupt pin goes active-low, a keypad button
    // is begin pressed:

while(digitalRead(INTERRUPT_PIN));

count++;
// Use readKeypad() to get a binary representation for
// which row and column are pressed
unsigned int keyData = io.readKeypad();

    // Use the getRow, and getCol helper functions to find
    // which row and column keyData says are active.
byte row = io.getRow(keyData);
byte col = io.getCol(keyData);
char key = keyMap[row][col];
Serial.print(String(row) + " | " + String(col) + " | ");
Serial.println(key);


// 4. Check and score

key=key-97;

Serial.print("I pressed: ");
Serial.println(key,DEC);

for (int i=0; i<5; i++) // KP: You are looping 5 times and checking if there is a match between key and the elements in the array. [FIXED]
{
Serial.print("Random Number: ");
Serial.println(randomNumber[i]);
if(key==randomNumber[i]) //1
{
Serial.print(T);
Serial.println("Match");
}

 else    {
   	if (key==randomNumber[i++]) //2
 {
	Serial.print(T);
    Serial.println("Match");
 }        
          	}
else      { 
  	 if(key==randomNumber[i+2])  //3
  {
    Serial.print(T);
    Serial.println("Match");
  }
             }
else      { 
  	 if(key==randomNumber[i+3])  //4
  {
    Serial.print(T);
    Serial.println("Match");
  }
             }
else      { 
  	 if(key==randomNumber[i+4])  //5
  {
    Serial.print(T);
    Serial.println("Match");
  }
             
else  // else wo a previous ‘if’    {

T=0;

Serial.println("Try Again");
tone(buzzer, 1000); // Send 1KHz sound signal...
delay(1000);        // ...for 1 sec
noTone(buzzer);     // Stop sound...
delay(1000);        // ...for 1sec
 wrong = 1;

}
[/quote]

So basically for our project we want to create a toy where there would be 5 random LED that will light up randomly in a 5x5 led strip.User have to key in all 5 position of the LED correct on the keypad for the SCORE to increment by 1. So i have to use arduino to generate the 5 numbers which will sync to the LED and the exact position of the number corresponding to the respective LED will light up. When the LED lights up there will be a 5x5 keypad connected to the arduino, where user will have to click the position of the LED on the keypad. The problem now is my arduino only checks the input from the keypad twice then it will exit to generate another 5 sets of random number. I want to ask for your help to edit this code because even though i key in the same values on the keypad as generated on the serial monitor output. My program will not check through the 5 sets of random number before deciding whether my user input all the values on the keypad correct or not. It will always just check till the 2 nd set of number and exit the program to generate a new set of random numbers.

  • List item

Read the forum guidelines to see how to properly post code.
Use the IDE autoformat tool (ctrl-t or Tools, Auto format) before posting code in code tags.

Post the whole code.

Please break your questions out of embedded comments in the code, and provide a short paragraph explaining what the program does or doesn't do, and explain what your actual problem is...

Please read and follow the instruction in the how to use the forum post.

Edit your post to add code tags.

Use the IDE autoformat tool (ctrl-t or Tools, Auto format) before posting code in code tags.

You might want to begin by giving us code that actually compiles.

You can't have more than one else per if:

      if (key == randomNumber[i]) //1
      {
        Serial.print(T);
        Serial.println("Match");
      }

      else    {
        if (key == randomNumber[i++]) //2
        {
          Serial.print(T);
          Serial.println("Match");
        }
      }
      else      {
        if (key == randomNumber[i + 2]) //3
        {
          Serial.print(T);
          Serial.println("Match");
        }
      }
      else      {
        if (key == randomNumber[i + 3]) //4
        {
          Serial.print(T);
          Serial.println("Match");
        }
      }
      else      {
        if (key == randomNumber[i + 4]) //5
        {
          Serial.print(T);
          Serial.println("Match");
        }

        else  // else wo a previous ‘if’    {
          T = 0;

        Serial.println("Try Again");
        tone(buzzer, 1000); // Send 1KHz sound signal...
        delay(1000);        // ...for 1 sec
        noTone(buzzer);     // Stop sound...
        delay(1000);        // ...for 1sec
        wrong = 1;
      }

I can't answer what these lines are for because they don't make any sense for this program.

  // What is all these line below for?
  /////////////////////////////////////////////////////////////////////////
  for (int a = 0; a < 5; a++)
  {
    pinMode(LEDpins[a], OUTPUT); //set LED as output
  }

  for (int b = 0; b < 5; b++)
  {
    pinMode(LEDpins[b], OUTPUT); //set LED as output
  }
  uint8_t x[25];
  for (size_t i = 0; i < 25; i++) x[i] = i + 1;

  for (size_t i = 0; i < 25; i++)
  {
    size_t j = random(i, 25);

    // swap x[i] and x[j]
    auto t = x[i];
    x[i] = x[j];
    x[j] = t;
  }
  ////////////////////////////////////////////////////////////////////////

Is this homework?
Have you written any type of flow chart or plan besides the code itself?

You are allowed to use paragraphs and stuff like that to make a block of text more like readable.

Where did the code come from in the first place? Link, please.

It looks like someone has mashed together a few examples. Please supply links to all the code you are stealing attempting to repurpose.

Do you have any kind of schematic or wiring diagram?

a7

என்னை ஏன் நீங்கள் ஒரு திருட்டுத்தனமாக அழைக்கிறீர்கள்? என் இரத்த மூளையில் இருந்து குறியீடு வந்தது

Didn’t. All questions and requests for information remain.

If you want help here, you have to try a little harder.

a7

Well some of it landed on the Sparkfun page. I wonder how it got there?
https://learn.sparkfun.com/tutorials/sx1509-io-expander-breakout-hookup-guide/all