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sergey_landar
sergey_landar
Inspiring
February 15, 2010
Question

How generate random letters?

  • February 15, 2010
  • 2 replies
  • 1409 views

I want generate random letter on the stage. Look to this letters and enter this letter on my keyboard.

How i can generate it?

And i try to generate numbers, but i always see wrong message. Why?

var myRandomNumber:Number = Math.ceil(Math.random() * 5);
my_txt.text=String(myRandomNumber);

my_keyboardText.text="Key Pressed:";

stage.addEventListener(KeyboardEvent.KEY_DOWN, keyPressed);
function keyPressed(event:KeyboardEvent)
{
     my_keyboardText.text="Key Pressed: "+String.fromCharCode(event.charCode);
     if (event.charCode==myRandomNumber)
     {
          my_txt.text="Correct";
     } else
     {
          my_txt.text="Wrong";
     }
}

Thank you.

This topic has been closed for replies.

2 replies

H
Harry Kunz
Inspiring
February 15, 2010

Looking at your question, the answer should be:

var nUpperCase:Number = 65;

var nLowerCase:Number = 97;

var nAscii:Number = nLowerCase + int(Math.random()*25);

var sChar:String = String.fromCharCode(nAscii);

This will generate a random lower case letter. If you want capital letters, use nUpperCase in the code instead of nLowerCase

Ned Murphy
Ned Murphy
Legend
February 15, 2010

I am not sure what you are trying to do, but you should learn to use the trace command so that you can see what things are and gain understanding.  Example:

function keyPressed(event:KeyboardEvent)
{
     my_keyboardText.text="Key Pressed: "+String.fromCharCode(event.charCode);

    trace(event.charCode,myRandomNumber);
     if (event.charCode==myRandomNumber)
     {
          my_txt.text="Correct";
     } else
     {
          my_txt.text="Wrong";
     }
}

sergey_landar
sergey_landarAuthor
Inspiring
February 15, 2010

yes, i'm tired:))

i was wrong.

i want make something like game 'learn to type in  the blind'.

so user will see letters on the monitor.

and try to repead, usign keyboard.

if user enter correct letter all will be ok:)

so, i dont know how generate random letters and how mach this letters with pressed keys?

Ned Murphy
Ned Murphy
Legend
February 15, 2010

Here's something you might be able to build upon...

var letters:Array = new Array("a","b","c","d","e");

var myRandomNumber:Number = Math.floor(Math.random() * 5);

my_txt.text= letters[myRandomNumber];

my_keyboardText.text="Key Pressed:";

stage.addEventListener(KeyboardEvent.KEY_UP, keyUsed);

function keyUsed(event:KeyboardEvent)
{
     var str:String = my_txt.text;
 
  my_keyboardText.text="Key Pressed: "+String.fromCharCode(event.charCode);
   
if (event.charCode == str.charCodeAt(0))
     {
          my_txt.text="Correct";
     } else
     {
          my_txt.text="Wrong";
     }
}

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