[SOLVED] Array declare Problem

Projects Programming
1

I'm making a little program in C++ (i don't really know how to code C++, i use to code scripts with BASH and it's totally different)
that program should have 3 buttons (2-3-4 pins) and 4 leds (5-6-7-8)
8 is not essential...

the program should make leds on 5-6-7 blink randomly and memorize the sequence into an array, and then you got to reproduce it with leds, then it blinks led on 8 pin to signale if right button is pressed, nothing else in the end.

Here is the code:

void setup (){

	pinMode(2,INPUT);
	pinMode(3,INPUT);
	pinMode(4,INPUT);
	pinMode(5,OUTPUT);
	pinMode(6,OUTPUT);
	pinMode(7,OUTPUT);
	pinMode(8,OUTPUT);
}


void loop ()
{
	

		
		//First Stage
		
		int cyclenumtoexe = rand()%5+1; //Gets a number Lower than 5 Increased by one (1-5)
		int cyclenum = 0;
		
		while (cyclenum<cyclenumtoexe)
		{
			//get a random number in each sequence... (cyclenumtoexe = sequences)
			int ledON = rand()%7+1;
			digitalWrite(ledON,HIGH);
			delay (250);
			digitalWrite(ledON,LOW);
			

			int a_memory[cyclenumtoexe]; 
			int svar1 = 0; 
			
			a_memory[svar1] = ledON; //Store Pin Number in array position.
			svar1++; 
			cyclenum++;
			
		}
		
		int svar2 = 0;
		char pincheck;


		while (svar2<=cyclenumtoexe)
		{
			pincheck = digitalRead(a_memory[svar2]);
			while (pincheck==LOW)
			{
				delay (25);
			}
			svar2++;

			
			digitalWrite(8,LOW);
			digitalWrite(8,HIGH);
			delay (75);
			digitalWrite(8,LOW);
			delay (75);
			digitalWrite(8,HIGH);
			delay (75);
			digitalWrite(8,LOW);
			
		}
		

}

but when i try to verify the sketch i got this error:

sketch_jan11a.ino: In function 'void loop()':
sketch_jan11a:76: error: 'a_memory' was not declared in this scope

There were lots of errors but i can't/don't know how to solve this one. Please help me.

2

On each pass through the while loop, do you really want to create a new array, and store the value in the first position of that array?

That hardly seems likely.

3

Damn i solved it! Tank you very much!

In Facts i declared the array into the while loop, now it's outsite it (it's in the void loop function).
Should i declare it outside the void loop function? Yes right?

4

If you declare a variable inside a function (loop() is a function) and you want the data to stay when the function is done then you make the variable static.
You can also make the variable global by declaring it outside of the functions.

When you deal with sharing variables between interrupt and main code, you will need to use the word volatile as well.