Vb6 类型与随机数生成器不匹配 [英] Vb6 type mismatch with random number generator

问题描述

我想为我正在创建的游戏生成一个 1 到 20 之间的随机数，但由于某种原因，此代码已停止工作并出现类型不匹配错误，我尝试了游戏中的其他生成器，但我得到了同样的错误.

I wanted to generate a random number between 1 and 20 for a game that I am creating and for some reason this code has stopped working and gives me a type mismatch error, I have tried other generators in the game but I get the same error.

Public Counter1 As Integer ' Counters for each reel
Public ArrayImgMid1 As Integer ' Store number to iterate over image arrays
Public ReelPic1 As Variant ' Array of images for each reel
Public Reel1Spin As Long ' Spins for each reel
Public ImgBeth, ImgWallow, ImgDan, ImgChris, ImgCatBug As StdPicture ' Images for reels

Private Sub CmdSpin_Click()

'Enable all timers to imitate spinning
TimerReel1.Enabled = True
TimerReel1.Interval = 100

' Disable spin button
CmdSpin.Enabled = False

' Set all counters to 0
Counter1 = 0

' Generate random number for the first reel to spin
Reel1Num = (CLng(Rnd * 20) + 1) ' This is highlighted when I press debug

推荐答案

这样写:

Dim Reel1Num As Long

Reel1Num = (CLng(Rnd * 20) + 1)

不要在 VB6 中使用 Integer - 它代表一个 16 位有符号整数，它的性能略低于 Long ，后者实际上是一个 32 位有符号整数.这样您也不会遇到 16 位数据类型的限制.

Don't use Integer in VB6 - it represents a 16-bit signed integer and it has slightly less performance than Long which is really a 32-bit signed integer. This way you also won't run into limits with the 16-bit data type.

您的代码不起作用的原因是 Int() 函数不会将值的数据类型转换为 Integer 类型 - 它会舍入指定的value 为整数值但保留其数据类型.

The reason your code doesn't work is because the Int() function doesn't convert the data type of a value to type Integer - it rounds the specified value to an integer value but keeps its data type.

要将值转换为特定数据类型，请使用 CInt()、CLng() 等函数.但正如我所说，除非您特别需要，否则避免使用 Integer - Long 在大多数情况下更好.

To convert a value to a particular data type, use the CInt(), CLng(), etc. functions. But as I said, avoid using Integer unless you specifically need it - Long is better in most cases.

在您发布代码后，我看不到 Reel1Num 变量的定义 - 它在哪里定义?是 Reel1Spin 吗?如果是这种情况，请确保启用 Tools->Options 中的 Require variable declaration 选项 - 默认情况下它是关闭的.如果你没有戴上它，这是一种很容易射中自己脚的方法.

After you posted your code, I can't see a definition of the Reel1Num variable - where is it defined? Is it Reel1Spin? If that's the case, make sure you enable the Require variable declaration option in Tools->Options - it's off by default. If you don't have it on, it's a very easy way to shoot yourself in the foot.

与您的错误无关，但您的大多数图像对象定义不正确 - 在 VB6 中，必须为每个变量指定变量的类型，而不是每行一次.所以在这一行:

Unrelated to your error, but most of your image objects are defined incorrectly - in VB6, the type of a variable must be specified for every variable, not once per line. So on this line:

Public ImgBeth、ImgWallow、ImgDan、ImgChris、ImgCatBug As StdPicture

您只真正创建了 1 个 StdPicture 对象，所有其他对象都将是变体.正确的做法是:

you only really create 1 StdPicture object, all others will be variants. The right way to do it is:

Public ImgBeth As StdPicture, ImgWallow As StdPicture, ImgDan As StdPicture, _
    ImgChris As StdPicture, ImgCatBug As StdPicture

除此之外，我看不出你的代码有什么问题——我的电脑上没有安装 VB6.请记住，VB6 有一种处理类型不匹配的时髦方式，在某些情况下，突出显示的行可能不是导致实际错误的行.这曾经让我发疯.

Aside from these, I can't see anything wrong with your code - I don't have VB6 installed on my computer. Keep in mind, that VB6 had a funky way of dealing with type mismatch and in some cases the highlighted line may not be the one that causes the actual error. This used to drive me crazy.

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