VB.net 數(shù)組怎么按任意元素的順序排序輸出

你直接傳一個數(shù)組進去，而且是一個結(jié)構(gòu)體數(shù)組，array.sort怎么知道根據(jù)結(jié)構(gòu)中的哪一個屬性進行排序？放一個c#的代碼你看看，VB和C#很相似的

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class Program

{

static void Main(string[] args)

{

People[] p = new People[3]

{

new People{name="張三"},

new People{name="李四"},

new People{name="張二名"}

};

//重點傳一個實現(xiàn)了IComparer接口的類進去，告訴Array.Sort怎么排序

Array.Sort(p, new PeopleCompare());

foreach (var item in p)

{

Console.WriteLine(item.name);

}

Console.ReadKey();

}

}

//People結(jié)構(gòu)體，換成類一樣的

public struct People

{

public string name { get; set; }

}

//實現(xiàn)了IComparer接口的類

public class PeopleCompare : IComparer

{

public int Compare(object x, object y)

{

People p1 = (People)x ;

People p2 = (People)y;

return p1.name.CompareTo(p2.name);

}

}

vb.net 排列組合 代碼

第一題:

不需要任何控件,代碼如下:

Private Sub Form_Click()

Dim A() As Integer, N As Integer

Dim St As String, I As Integer, J As Integer

Randomize

Do

St = InputBox("數(shù)字的個數(shù)", "輸入", Int(Rnd * 100))

If St = "" Then

MsgBox "請輸入數(shù)字!"

Else

N = Int(Val(St))

If N 1 Then

MsgBox "請輸入大于0的數(shù)字!"

Else

Exit Do

End If

End If

Loop

ReDim A(N)

For I = 1 To N

Do

St = InputBox("第" + Str(I) + "個數(shù)字", "輸入", Int(Rnd * 100))

If St = "" Then

MsgBox "請輸入數(shù)字!"

Else

A(I) = Int(Val(St))

Exit Do

End If

Loop

Next

For I = 1 To N - 1

For J = I + 1 To N

If A(I) A(J) Then

A(0) = A(I)

A(I) = A(J)

A(J) = A(0)

End If

Next

Next

For I = 1 To N

Open App.Path "\" Trim(Str(I)) ".txt" For Output As #1

Print #1, A(I)

Close #1

Next

Print "已經(jīng)把"; N; "個數(shù)寫入到"; App.Path; "\1.txt 到 "; N; ".txt中.請查看."

End Sub

'已經(jīng)運行過.

第二題:

DIM 是變量聲明語句,它的格式為:

dim 變量名[as 格式] [,變量名[as 格式][,變量名[as 格式]......]

其中:

變量名:以字母或漢字開始的字串,代表一個變量

格式有以下幾種:

屬于數(shù)字的有五種:

(1)字節(jié)型:byte可取值0-255

(2)整形:integer可取值-32768至32767

(3)長整形:long(可取值范圍很大的正負整數(shù))

(4)單精度型:single(可取值小數(shù))

(5)雙精度型:double(可取值范圍更大,小數(shù)位數(shù)更多的小數(shù))

字符串型:string(可代表由字母\數(shù)字或漢字組成的字符集合)

布爾型:boolean(取值為ture\false)

日期型:date(可表示形如2009-5-26 02:36這樣的組合)

如果要用姓名\住址\單位名稱...等用字符串型(string)

eg:dim name as string(用name變量表示名字時,聲明成字符串變量)

如果是用數(shù)字需要做計算,如工資\合計\人數(shù)....等要用數(shù)字型,但有一個原則,優(yōu)先選用范圍小的(按照字節(jié)型(byte)\整形(integer)\長整形(long)\單精度型(single)\雙精度型(double)的順序選擇),夠用就可以了,這樣可以占用內(nèi)存少,運算速度快.

eg:dim count as integer(用integer表示員工人數(shù)時,可聲明成整形變量)

eg:dim sum as single(用sum表示工資時,可聲明成單精度型變量)

不知是否說得清楚了.

VB.NET 2維數(shù)組排序排序和賦值問題

窗體上添加3個標簽，1個按鈕，在按鈕的單擊事件里寫代碼，如下：

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Dim a(,) As Integer = {{5, 6}, {1, 3}, {8, 9}, {72, 1}, {63, 4}}

Dim Temp As Integer

Dim i As Integer

Dim j As Integer

Dim x As Integer

Dim y As Integer

'顯示排序前的數(shù)據(jù)

Label1.Text = "排序前數(shù)據(jù)：" vbCrLf

For i = 0 To 4

Label1.Text = Label1.Text a(i, 0) " " a(i, 1) vbCrLf

Next

For i = 0 To 3

For j = i + 1 To 4

If a(i, 0) a(j, 0) Then

Temp = a(i, 0)

a(i, 0) = a(j, 0)

a(j, 0) = Temp

Temp = a(i, 1)

a(i, 1) = a(j, 1)

a(j, 1) = Temp

End If

Next

Next

'顯示排序前的數(shù)據(jù)

Label2.Text = "排序后數(shù)據(jù)：" vbCrLf

For i = 0 To 4

Label2.Text = Label2.Text a(i, 0) " " a(i, 1) vbCrLf

Next

'把第3行元素賦予X,Y

x = a(2, 0)

y = a(2, 1)

'輸出X,Y

Label3.Text = "X=" x vbCrLf "Y=" y

End Sub

vb.net的隨機3個數(shù)字，然后排序一下

給你一個最簡單的冒泡排序代碼：

將三個數(shù)放到一個數(shù)組中。

a(0)=val(text1.text):a(1)=val(text2.text):a(2)=val(text3.text)

dim flag as Boolean,temp as Integer

for i = 0 to 2

flag = true

for j = 2 to 1

if a(j)a(j-1) then

temp = a(j-1)

a(j-1) = a(j)

a(j) = temp

flag = false

end if

next j

if flag then Exit For

next i

text4.text=a(0):text5.text=a(1):text6.text=a(2)

編寫一個 VB.NET 程序,產(chǎn)生 100 個 100 以內(nèi)的隨機數(shù)，將他們從大到小排序后輸出

Private Sub Command1_Click()

Dim a(1 To 100) As Integer

Dim i As Integer, j As Integer, k As Integer

For i = 1 To 100 '給數(shù)組a一百個元素賦值，并換每行十個數(shù)字輸出來窗體上

a(i) = Int(Rnd * 101)

k = k + 1

Print Tab((k - 1) * 5); a(i);

If k = 10 Then k = 0: Print

Next i

Print

Print

For i = 100 To 2 Step -1 '用冒泡排序法對數(shù)組進行排序

For j = 1 To i - 1

If a(j) a(j + 1) Then

t = a(j): a(j) = a(j + 1): a(j + 1) = t

End If

Next j

Next i

For i = 1 To 100 '輸出排好序的數(shù)組

k = k + 1

Print Tab((k - 1) * 5); a(i);

If k = 10 Then k = 0: Print

Next i

End Sub

vb.net冒泡排序法代碼

試試看：

For?i?=?LBound(moto)?To?UBound(moto)?-?1

For?j?=?LBound(moto)?To?UBound(moto)?-?1?-?i

If?moto(j)??moto(j?+?1)?Then

t?=?moto(j)

moto(j)?=?moto(j?+?1)

moto(j?+?1)?=?t

End?If

Next?j

Next?i

For?i?=?LBound(moto)?To?UBound(moto)

Print?moto(i);

Next?i

當前名稱：vb.net排序代碼,vb排序算法
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