AQA AS考试等级 - COMP 1 VB

Question

我的程序工作似乎遇到了麻烦，我发现很难理解我做错了什么。

我需要以下方面的帮助：

1. 除了不允许用户不输入数字之外，我还需要它不允许用户在列/行部分输入字符串。我正在考虑与ASCII值相关的事情编辑这个我修好了我认为

2. 保存并加载游戏 - 我有这两个工作然后我不知道我做了什么，因为现在他们不再工作。我不知道在这里调用保存游戏文件。

这是AQA As Level的骨架代码。他们给你（这不违法！）请帮助我！

 Sub GetRowColumn(ByRef Row As Integer, ByRef Column As Integer)
        Dim validColumn, validRow As Boolean ' These are currently set for the user to define them
        Do
            Try
                Do
                    Console.Write("Please enter column: ")
                    Column = Console.ReadLine()
                    If Column < 0 Or Column > 9 Then
                        Console.WriteLine(" That is an Invalid Input")
                    End If
                    validColumn = True     'Sets value to true if the input is valid
                    Console.WriteLine()
                Loop Until Column < 10 And Column >= 0
            Catch Ex As Exception   'If the Exception code is run then the value is set to false and the code loops. 
                validColumn = False
                Console.WriteLine("Enter number from 0 to 9")
            End Try
        Loop Until validColumn = True   'Code will loop until the ValidCol = True
        ' Below is the exact same code, but for the row. 
        Do
            Try
                Do
                    Console.Write("Please enter row: ")
                    Row = Console.ReadLine()
                    If Row < 0 Or Row > 9 Then
                        Console.WriteLine(" That is an invalid Input")
                    End If
                    validRow = True  'Sets value to true if the input is valid
                    Console.WriteLine()
                Loop Until Row < 10 And Row >= 0 'This code above will loop intil row is below than 10 
            Catch Ex As Exception 'If the Exception code is run then the value is set to false and the code loops
                validRow = False
                Console.WriteLine()
                Console.WriteLine("Enter number from 0 to 9")
                Console.WriteLine()
            End Try
            'Code will loop until the ValidRow = True
        Loop Until validRow = True
    End Sub

其他代码

'Skeleton Program for the AQA AS Paper 1 Summer 2016 examination 'this code should be used in conjunction with the Preliminary Material 'written by the AQA Programmer Team 'developed in the Visual Studio 2008 programming environment 'Version Number 1.0 Imports System.IO Module Module1 Const TrainingGame As String = "Training.txt" ' Calls the training text file used by new players Structure TShip ' Starts a new structure for use later that includes a stringed name and a size as an integer Dim Name As String Dim Size As Integer End Structure Sub MakePlayerMove(ByRef Board(,) As Char, ByRef Ships() As TShip) ' This part of the code advances on their column and row selection from earlire Dim Row As Integer Dim Column As Integer GetRowColumn(Row, Column) If Board(Row, Column) = "m" Or Board(Row, Column) = "h" Then ' m is miss h is a hit Console.WriteLine("Sorry, you have already shot at the square (" & Column & "," & Row & "). Please try again.") ElseIf Board(Row, Column) = "-" Then ' Message to user to say that they have shot in a sqaure they habe already shot in Console.WriteLine("Sorry, (" & Column & "," & Row & ") is a miss.") Board(Row, Column) = "m" Else Console.WriteLine("Hit at (" & Column & "," & Row & ").") Board(Row, Column) = "h" End If End Sub
Sub SetUpBoard(ByRef Board(,) As Char)
    Dim Row As Integer
    Dim Column As Integer
    For Row = 0 To 9
        For Column = 0 To 9
            Board(Row, Column) = "-"
        Next
    Next
End Sub

Sub LoadGame(ByVal Filename As String, ByRef Board(,) As Char)
    Dim Row As Integer
    Dim Column As Integer
    Dim Line As String
    Using FileReader As StreamReader = New StreamReader(Filename)
        For Row = 0 To 9
            Line = FileReader.ReadLine()
            For Column = 0 To 9
                Board(Row, Column) = Line(Column)
            Next
        Next
    End Using
End Sub

Sub PlaceRandomShips(ByRef Board(,) As Char, ByVal Ships() As TShip)
    Dim Valid As Boolean
    Dim Row As Integer
    Dim Column As Integer
    Dim Orientation As Char
    Dim HorV As Integer
    For Each Ship In Ships
        Valid = False
        While Not Valid
            Row = Int(Rnd() * 10)
            Column = Int(Rnd() * 10)
            HorV = Int(Rnd() * 2)
            If HorV = 0 Then
                Orientation = "v"
            Else
                Orientation = "h"
            End If
            Valid = ValidateBoatPosition(Board, Ship, Row, Column, Orientation)
        End While
        Console.WriteLine("Computer placing the " & Ship.Name)
        PlaceShip(Board, Ship, Row, Column, Orientation)
    Next
End Sub

Sub PlaceShip(ByRef Board(,) As Char, ByVal Ship As TShip, ByVal Row As Integer, ByVal Column As Integer, ByVal Orientation As Char)
    Dim Scan As Integer
    If Orientation = "v" Then
        For Scan = 0 To Ship.Size - 1
            Board(Row + Scan, Column) = Ship.Name(0)
        Next
    ElseIf Orientation = "h" Then
        For Scan = 0 To Ship.Size - 1
            Board(Row, Column + Scan) = Ship.Name(0)
        Next
    End If
End Sub

Function ValidateBoatPosition(ByVal Board(,) As Char, ByVal Ship As TShip, ByVal Row As Integer, ByVal Column As Integer, ByVal Orientation As Char)
    Dim Scan As Integer
    If Orientation = "v" And Row + Ship.Size > 10 Then
        Return False
    ElseIf Orientation = "h" And Column + Ship.Size > 10 Then
        Return False
    Else
        If Orientation = "v" Then
            For Scan = 0 To Ship.Size - 1
                If Board(Row + Scan, Column) <> "-" Then
                    Return False
                End If
            Next
        ElseIf (Orientation = "h") Then
            For Scan = 0 To Ship.Size - 1
                If Board(Row, Column + Scan) <> "-" Then
                    Return False
                End If
            Next
        End If
    End If
    Return True
End Function

Function CheckWin(ByVal Board(,) As Char)
    Dim Row As Integer
    Dim Column As Integer
    For Row = 0 To 9
        For Column = 0 To 9
            If Board(Row, Column) = "A" Or Board(Row, Column) = "B" Or Board(Row, Column) = "S" Or Board(Row, Column) = "D" Or Board(Row, Column) = "P" Then
                Return False
            End If
        Next
    Next
    Return True
End Function

Sub PrintBoard(ByVal Board(,) As Char)
    Dim Row As Integer
    Dim Column As Integer
    Console.WriteLine()
    Console.WriteLine("The board looks like this: ")
    Console.WriteLine()
    Console.Write(" ")
    For Column = 0 To 9
        Console.Write(" " & Column & "  ")
    Next
    Console.WriteLine()
    For Row = 0 To 9
        Console.Write(Row & " ")
        For Column = 0 To 9
            If Board(Row, Column) = "-" Then
                Console.Write(" ")
            ElseIf Board(Row, Column) = "A" Or Board(Row, Column) = "B" Or Board(Row, Column) = "S" Or Board(Row, Column) = "D" Or Board(Row, Column) = "P" Then
                Console.Write(" ")
            Else
                Console.Write(Board(Row, Column))
            End If
            If Column <> 9 Then
                Console.Write(" | ")
            End If
        Next
        Console.WriteLine()
    Next
End Sub

Sub DisplayMenu()
    Console.WriteLine("MAIN MENU") ' Main Menu Screen that is displayed to the user
    Console.WriteLine()
    Console.WriteLine("1. Start new game")
    Console.WriteLine("2. Load training game")
    Console.WriteLine(" 3. Change game limit")
    Console.WriteLine("4. Load Saved Game")
    Console.WriteLine("9. Quit")
    Console.WriteLine()
End Sub
Function GetMainMenuChoice() ' Will check if the menu choice is picked can go through
    Dim Choice As Integer ' Dim choice as an integer
    Try
        Console.Write("Please enter your choice: ") ' Ask user to enter their choice for the menu option
        Choice = Console.ReadLine() ' User enters here
        Console.WriteLine()
        If Choice <> "1" And Choice <> "2" And Choice <> "9" And Choice <> "10" Then
            Console.WriteLine("ERROR: Invalid input!") ' If their choice doesnt fit 1, 2 or 9 then it says this message
        End If
        Return Choice ' Return the choice to another part of code
    Catch Ex As Exception
        Console.WriteLine("Please enter a valid input (1, 2,9 or 10)")
    End Try
End Function

Sub PlayGame(ByVal Board(,) As Char, ByVal Ships() As TShip)
    Dim GameWon As Boolean = False
    Dim score As Integer = 0
    Dim gamelimit As Integer = 50
    Do
        PrintBoard(Board)
        MakePlayerMove(Board, Ships)
        score = score + 1
        Console.WriteLine("You have taken {0} number of moves,", score)
        GameWon = CheckWin(Board)
        If GameWon Then
            Console.WriteLine("All ships sunk!")
            Console.WriteLine()
        End If
    Loop Until GameWon Or score = 50
    If score = 50 Then
        Console.WriteLine("You used all your moves up. Try again ")

    End If

End Sub
Sub SaveGame(ByRef Board(,) As Char)
    Dim SaveGameWrite As StreamWriter
    SaveGameWrite = New StreamWriter("TEST.txt", True)

    For x As Integer = 0 To 9
        For y As Integer = 0 To 9
            SaveGameWrite.Write(Board(x, y))
        Next
    Next
    SaveGameWrite.Close()
End Sub
Sub LoadSavedGame(ByVal Filename As String, ByRef Board(,) As Char)
    Dim Row, Column As Integer
    Dim Line As String

    Console.WriteLine("Load training game or open a saved game? T for training or S for saved")

    If Console.ReadLine = "" Then
        Console.WriteLine("Enter the filename: ")
        Filename = Console.ReadLine
    End If
    Using FileReader As StreamReader = New StreamReader("C:\" & Filename)
        For Row = 0 To 9
            Line = FileReader.ReadLine()
            For Column = 0 To 9
                Board(Row, Column) = Line(Column)
            Next
        Next
    End Using
End Sub
Sub SetUpShips(ByRef Ships() As TShip)
    Ships(0).Name = "Aircraft Carrier"
    Ships(0).Size = 5
    Ships(1).Name = "Battleship"
    Ships(1).Size = 4
    Ships(2).Name = "Submarine"
    Ships(2).Size = 3
    Ships(3).Name = "Destroyer"
    Ships(3).Size = 3
    Ships(4).Name = "Patrol Boat"
    Ships(4).Size = 2
End Sub

Sub Main()
    Dim Board(9, 9) As Char
    Dim Ships(4) As TShip
    Dim MenuOption As Integer
    Do
        SetUpBoard(Board)
        SetUpShips(Ships)
        DisplayMenu()
        MenuOption = GetMainMenuChoice()
        If MenuOption = 1 Then
            PlaceRandomShips(Board, Ships)
            PlayGame(Board, Ships)
        ElseIf MenuOption = 2 Then
            LoadGame(TrainingGame, Board)
            PlayGame(Board, Ships)
        ElseIf MenuOption = 3 Then
            PlaceRandomShips(Board, Ships)
            PlayGame(Board, Ships)
        End If
    Loop Until MenuOption = 9
End Sub

End Module

提前致谢，

Answer 1

对于您的第一段代码，为什么要麻烦自己使用ASCII？它已经过时，可以避免

    Dim validCol As Boolean = False
    Dim column As Integer
    While validCol = False
        Console.Write("Please enter column: ")
        Dim columnValue As String = Console.ReadLine

        If (Integer.TryParse(columnValue, column)) Then
            If column >= 0 AndAlso column < 10 Then
                validCol = True
            Else
                Console.WriteLine("Number must be between 0 and 9")
            End If
        Else
            Console.WriteLine("This is not a number.")
        End If
    End While

    'Do whatever with column

Integer.TryParse将尝试将用户提供的字符串解析为Integer，如果失败，您将获得＆＃34;这不是数字。＆＃34;消息，否则它将继续检查该号码是否在您想要的范围内。

Answer 2

您的保存游戏子未指定路径

SaveGameWrite = New StreamWriter("TEST.txt", True)

当你的加载游戏

时

Using FileReader As StreamReader = New StreamReader("C:\" & Filename)

您的游戏很可能不会保存到C：\，而是保存到项目文件夹中的目录。您应该指定C：\的路径（将程序数据保存到驱动器的根目录不好）或将文件保存到Application.CommonAppDataPath - 所以代码中的两行现在是..

SaveGameWrite = New StreamWriter(Application.CommonAppDataPath & "TEST.txt", True)

和

Using FileReader As StreamReader = New StreamReader(Application.CommonAppDataPath & Filename)