声明的二维阵列 [英] declaring two-dimensional array

问题描述

我有几个大学的任务我有麻烦。真的我只是困惑关于数组的一件事。我需要声明一个三栏，5排阵。前两列是整数，并且所述第三列是字母等级。所以，我对因为它们是不同的声明的数据类型非常困惑。这是我第一次去，周围的阵列，所以请原谅我的无知。这里是一个什么我的数组应该是什么样子。

I have a couple of college assignments I am having trouble with. Really I am just confused about one thing regarding an array. I need to declare a three column, 5 row array. The first two columns are integers and the third column is the letter grade. So I am very confused about declaring the data type since they are different. This is my first go-around with arrays, so please excuse my ignorance. Here is an what my array is supposed to look like.

Column 1 {0,300,350,400,450}
Column 2 {299,349,399,449,500}
Column 3 {F,D,C,B,A}

（这是一个分级的应用程序）

(It's a grading app)

我能解决自己的问题的其余部分，我只是困惑这个阵列部分。所以我的问题是严格如何声明这样一个数组。它说的使用二维阵列仅混淆我更多，因为有三列。谢谢！

I can solve the rest of the problem myself, I am just confused about this array portion. So my question is strictly about how to declare such an array. It say's to use a two-dimensional array which only confuses me more since there are three columns. Thank you!

推荐答案

2维数组是正确的。一是指数为列，第二个索引是行的。

2-dimensional array is correct. First index is column, second index is row.

Dim strData(,) As String 'Use String variable type, even for the numbers
Dim intRowCount As Integer = 5
Dim intColumnCount As Integer = 3
ReDim strData(intColumnCount - 1, intRowCount - 1) 'subtract 1 because array indices are 0-based. Column 0 = Range start, Column 1 = Range End, Column 2 = Grade
'first row
strData(0, 0) = "0" 'Range start
strData(1, 0) = "299" 'Range end
strData(2, 0) = "F" 'Grade
'second row
strData(0, 1) = "300"
strData(1, 1) = "349"
strData(2, 1) = "D"
'third row
strData(0, 2) = "350"
strData(1, 2) = "399"
strData(2, 2) = "C"
'fourth row
strData(0, 3) = "400"
strData(1, 3) = "449"
strData(2, 3) = "B"
'fifth row
strData(0, 4) = "450"
strData(1, 4) = "500"
strData(2, 4) = "A"
'Add a row
intRowCount = intRowCount + 1
ReDim Preserve strData(intColumnCount - 1, intRowCount - 1)
'sixth row
strData(0, 5) = "501"
strData(1, 5) = "600"
strData(2, 5) = "A+"

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