如何在basic4android中从数组中提取随机数？

Question

我对Basic4Android编程非常陌生。我只想知道如何从数组中画一个随机数。

Answer 1

如果条目为10，则可以通过随机化数组示例中的项目总数来做到这一点，然后先将其随机化并传递给变量。稍后使用该变量调用数组值。复制下面的代码并粘贴到并运行

Dim myArray As List  ' Declare your Array
myArray.Initialize() ' Initialize array

myArray.AddAll(Array As String("January","February","March","April"))

'Since array values index starts from zero, then four items in a list will be from 0 to 3. 
'So randomize 0 to 4    
Dim randNum As Int

randNum = Rnd(1,4)  'Generating random number 

Log ("Current RAndom Number is " & randNum) 'This will print the random number

    '=========PRINT RESULT TO LOGCAT ======
'Since we are generating from 1 to 4, we use -1 (4-1=3 ie April ==Array index starts from 0 to 3)
Log(myArray.Get(randNum-1)) 

Answer 2

Dim arrayLength as int = 100     ' an arbitrary integer >0 
Dim myArray(arrayLength) as int  ' or double, float, long, byte...

' ... fill the array ...

Log(myArray(Rnd(0,arrayLength)))  ' "Rnd" goes from 0 (incl) to arrayLength (excl)