小编Ale*_*vid的帖子

FMT fmt=new FMT();    

public void ReadFmtHeader()
{
    fmt.s_Sub_Chunk_ID_1 = reader.ReadBytes(4);
    fmt.ui_Sub_Chunk_Size_ID_1 = reader.ReadBytes(4);
    fmt.us_Audio_Format = reader.ReadBytes(2);
    fmt.us_Num_Channels = reader.ReadBytes(2);
    fmt.ui_Sample_Rate = reader.ReadBytes(4);
    fmt.ui_Byte_Rate = reader.ReadBytes(4);
    fmt.us_Block_Align = reader.ReadBytes(2);
    fmt.us_Bits_Per_Sample = reader.ReadBytes(2);

    if (Convert.ToInt32(fmt.ui_Sub_Chunk_Size_ID_1) == 18)// Exception thrown on this line
    {
        // Read any extra values
        int fmtExtraSize = reader.ReadInt16();
        reader.ReadBytes(fmtExtraSize);
    }
}

我正在尝试读取波形文件,然后使用标题信息重新创建它并保存到文件.我不知道是什么问题.任何人都可以帮我吗？

为什么我无法从Derived访问M3方法？Intellisense仅显示基类中的M1和M2.如何将bc的参考从Base类型更改为Refernce Type,以便我可以访问M3方法.

class Program
{
    static void Main(string[] args)
    {
        Base bc = new Derived();
        bc.M3():// error
    }
}

class Base
{
    public void M1()
    {
        Console.WriteLine("M1 from BASE.");
    }
    public void M2()
    {
        Console.WriteLine("M2 from BASE.");
    }
}

class Derived : Base
{
    public void M3()
    {
        Console.WriteLine("M3 from DERIVED.");
    }
}

<Canvas x:Key="myCanvas" 
    MinHeight="30" MinWidth="30" Clip="F1 M 0,0L 48,0L 48,48L 0,48L 0,0" >
    <Path Data="F1M1737.61,7339.85C1720.49,7342.44 1709.83,7334.36 1709.83,7334.36  1701.44,7341.47 1682.84,7340.17 1682.84,7340.17 1682.66,7388.31 1709.83,7397.03 1709.83,7397.03 1741.17,7386.37 1737.61,7339.85 1737.61,7339.85 M1709.54,7386.88C1707.5,7386.88 1705.85,7385.23 1705.85,7383.18 1705.85,7381.14 1707.5,7379.49 1709.54,7379.49 1711.58,7379.49 1713.23,7381.14 1713.23,7383.18 1713.23,7385.23 1711.58,7386.88 1709.54,7386.88 M1712.37,7367.58C1712.37,7367.58 1712.28,7370.72 1710.94,7372.06 1710.94,7372.06 1709.33,7373.48 1707.54,7371.61 1707.54,7371.61 1707.09,7370.31 1706.47,7366.75L1705.48,7352.56 1705.48,7348.72C1705.48,7348.72 1705.59,7345.14 1709.61,7344.51 1709.61,7344.51 1713.36,7344.34 1713.53,7348.27 1713.53,7348.27 1713.98,7352.56 1712.37,7367.58" Stretch="Uniform" Fill="#FFF1A603" Width="26" Height="26" Margin="0,0,0,0" RenderTransformOrigin="0.5,0.5">
        <Path.RenderTransform>
            <TransformGroup>
                <TransformGroup.Children>
                    <RotateTransform Angle="0" />
                    <ScaleTransform ScaleX="1" ScaleY="1" />
                </TransformGroup.Children>
             </TransformGroup>
        </Path.RenderTransform>
    </Path>
</Canvas>

如何将wpf的Image Source属性设置为canvas而不是image url？

像这样的东西 …

我有一个下面定义的数组类型 -

TYPE INPUT_ARRAY_NUM IS TABLE OF NUMBER INDEX BY BINARY_INTEGER;

我已将上述类型的变量定义为 -

temp INPUT_ARRAY_NUM;

用以下值填充它们 -

temp(0) := 1;
temp(1) := 1;
temp(2) := 3;

如何获得不同的值(1,3)？

如何将View属性的类型重写为我的自定义类型。我的CustomGroupListCollectionView类型为Groups属性添加了额外的属性。在运行时，当我观察到View属性的类型为ListCollectionView时，我想将其更改为CustomGroupListCollectionView。

public class CollectionViewSourceCustom : CollectionViewSource
{
    public new  CustomGroupListCollectionView View { get; set; }
}

public class CustomGroupListCollectionView : ListCollectionView
{
    private readonly CustomGroup _allGroup;

    public CustomGroupListCollectionView(IList list)
        : base(list)
    {
        _allGroup = new CustomGroup("All");
        foreach (var item in list)
        {
            _allGroup.AddItem(item);
        }
    }

    public override ReadOnlyObservableCollection<object> Groups
    {
        get
        {
            var group = new ObservableCollection<object>(base.Groups.ToList());
            group.Add(_allGroup);
            return new ReadOnlyObservableCollection<object>(group);
        }
    }
}

public class CustomGroup : CollectionViewGroup
{
    public CustomGroup(object name)
        : base(name)
    {
    }

    public void AddItem(object …

我有一个名为Sample的类,其名称为Name,ToString()的字符串属性被重写以返回Name属性.

然后我创建了两个实例s1和s2,s1初始化,它的Name属性设置为"ABC",s2设置为null.

当我尝试使用??打印值时 对于s2,不打印c#的运算符,值字符串"Null".

class Program
{
    static void Main(string[] args)
    {
        Sample s1 = new Sample();
        s1.Name = "ABC";

        Sample s2 = null;

        Console.WriteLine("Some Sample Name : " + s1 ?? "Null");
        Console.WriteLine("Some Sample Name : " + s2 ?? "Null");
        Console.ReadLine();
    }
}

class Sample 
{
    string _Name;
    public string Name
    {
        get { return _Name; }
        set { _Name = value; }
    }

    public override string ToString()
    {
        return Name;
    }
}

输出:

Some Sample Name : …

为什么使用on和off宏会产生问题.我是新手使用c宏.宏声明是否正确或代码是否存在其他问题.请帮忙 ？？

#include<stdio.h>
#include<stdint.h>

#define ONE 1;             //  OR BY   1 [ 0 0 0 0 0 0 0 1 ] TO insert 1 at LSB position             
#define TWO_FIVE_FOUR 254; // AND BY 254 [ 1 1 1 1 1 1 1 0 ] TO insert 0 at LSB position

#define on(x) (x|ONE)
#define off(x) (x & TWO_FIVE_FOUR)

int main()
{
    uint8_t a=53;

    printf("\nValue of byte a : %d",a );

    printf("\nValue of byte b : %d",on(a)); //Error

    printf("\nValue of byte …

float f=44268/107402;
printf("\n%f",f);

输出:

0.000000

怎么会发生这种情况!

我在win 7上使用了pelles c ide.

我想在c中创建一个文件(.bmp)的精确副本

#include<stdio.h>

int main()
{
    FILE *str,*cptr;

    if((str=fopen("org.bmp","rb"))==NULL)
    {
        fprintf(stderr,"Cannot read file\n");
        //return 1;
    }

    if((cptr=fopen("copy.bmp","wb"))==NULL)
    {
        fprintf(stderr,"Cannot open output file\n");
        //return 1;
    }

    fseek(str, 0, SEEK_END);
    long size=ftell(str);
    printf("Size of FILE : %.2f MB \n",(float)size/1024/1024);
    char b[2];

    for(int i=0;i<size;i++)
    {
        fread(b,1,1,str);
        fwrite(b,1,1,cptr);
    }

    fseek(cptr, 0, SEEK_END);
    long csize=ftell(str);
    printf("Size of created FILE : %.2f MB \n",(float)csize/1024/1024);
    fclose(str);
    fclose(cptr);

    return 0;
}

虽然它创建了一个大小相同的文件,但是在尝试查看新创建的位图副本时,Windows会引发错误.为什么会这样？

我有3个java类.堆栈 - 实现堆栈.Stackserver - 实现基于用户操作创建Stack对象并返回结果的服务器StackClient - 实现发送操作请求并从服务器接收reslut的客户端.

动作是推,弹出,显示和退出.

当我输入动作时,它总是说无效操作.任何人都可以在程序中找到错误吗？

堆栈类

public class Stack
{
    private int maxSize;
    private int[] stackArray;
private int top,i;

public Stack(int s)
{
        maxSize = s;
        stackArray = new int[maxSize];
        top = -1;
}

public void push(int j) 
{
        stackArray[++top] = j;
}

    public String display()
    {
        i=top;
        String s="";
        while(i>=0)
        {
            s=s+" "+stackArray[i--];
        }
        return s;
    }    

public int pop()
{
        return stackArray[top--];
}

public int peek()
{
        return stackArray[top];
}

public boolean isEmpty()
{ …

do
{
    swap=false;
    for(int i=0; i<256; i++)
    {
    if(pd[i]<pd[i+1])
    {
        int temp=pd[i];
            pd[i]=pd[i+1];
            pd[i+1]=temp;
        swap=true;
        }
    }
}
while(swap);

它只能正确返回前两个结果,其余为0.我正在排序浮点数.