C# 程序不会 运行 过去的对象实例
C# program won't run past object instance
我正在创建一个程序,它应该创建一个带有音符泛音的列表并将它们显示在控制台上。该程序运行时没有编译器错误,但输出不是预期的,我似乎不明白为什么。稍后我会添加其他功能,但首先我想完成这项工作。主要方法如下所示:
public static void Main (string[] args)
{
//test method before object instance
Console.WriteLine ("Test 1");
//creates object instance with frequency = 110f
CompositeWave myWave = new CompositeWave (110f);
//test method after object instance
Console.WriteLine ("Test 2");
//CompositeWave method that adds items to overtoneWavesList
myWave.createNaturalOvertones();
//prints all overtone frequencies in order
foreach (KeyValuePair<byte,SineWave> valuePair in myWave.overtoneWavesList) {
Console.WriteLine (valuePair.Key + " - " + valuePair.Value.tonicFrequecy);
}
}
预期的输出应该类似于
/*
* Test 1
* Test 2
* 0 - 220
* 1 - 330
* 2 - 440
* 3 - 550
* ... so on
* /
但输出只是
/*
* Test 1
* /
并且该计划永远不会完成,也不会再进一步。
这些是我在命名空间中使用的 classes(它们仍然具有未实现的功能,例如波的振幅):
声波的基本class(频率不能高于24K,因为那样就听不见了):
/// <summary>
/// Basic sound wave class.
/// </summary>
public abstract class Wave
{
//simple wave properties
public float tonicFrequecy
{
get
{
return tonicFrequecy;
}
set
{
if (value > 24000f) {
tonicFrequecy = 24000f;
} else {
tonicFrequecy = value;
}
}
}
public float tonicAmplitude { get; set;}
}
从基波class导出的正弦波class:
/// <summary>
/// Simple sine wave with frequency spectrum concentred in only one fundamental frequency.
/// </summary>
public class SineWave : Wave
{
//initializer
public SineWave (float frequency = 440f, float amplitude = 0f)
{
this.tonicFrequecy = frequency;
this.tonicAmplitude = amplitude;
}
}
以及从基波 class 派生的复合波 class(我在 Main 方法中实例化):
/// <summary>
/// Complex sound wave composed of multiple sine waves with different frequencies and amplitudes.
/// </summary>
public class CompositeWave : Wave
{
//initializer
public CompositeWave (float frequency = 440f, float amplitude = 0f)
{
this.tonicFrequecy = frequency;
this.tonicAmplitude = amplitude;
this.overtoneWavesList = new SortedList<byte, SineWave>(1);
}
//overtone list that compose the composite wave
public SortedList<byte,SineWave> overtoneWavesList { get; set;}
/// <summary>
/// Creates possible natural overtones and sets all amplitudes to zero.
/// </summary>
public void createNaturalOvertones ()
{
float overtoneFrequency = 0f;
for (byte i = 2; overtoneFrequency <= 24000f; i++) {
//sets overtone frequency as multiple of fundamental
overtoneFrequency = this.tonicFrequecy * (float)i;
//sets list key and add overtone to list
int key = (int)i - 2;
this.overtoneWavesList.Add ((byte)key, new SineWave(overtoneFrequency));
}
}
}
我已经尝试了几乎所有的方法,但不明白为什么它没有比测试 1 更进一步:(
我知道这是一个很长 post 的简单问题,对此我深表歉意,但在此先感谢您的任何答复!
您可能在构建 CompositeWave
实例期间遇到 Whosebug 异常,因为您的 tonicFrequency
属性 是自引用的:
public float tonicFrequecy
{
get
{
return tonicFrequecy; // this points back to itself
}
A 属性 是对 class 数据的抽象 - 它不为 class 数据提供实际的 存储 。您需要在 class 中有一个单独的字段用于存储。例如:
private float _tonicFrequency; // this private field stores the data
// the property uses the private field for storage
public float tonicFrequency {
get { return _tonicFrequency; }
set { if (value > 24000f) _tonicFrequency = 24000f; else _tonicFrequency = value; }
}
在 auto-properties 的情况下(就像你的 tonicAmplitude
),你没有这个问题,因为编译器会自动为你添加一个内部字段——但肯定有一个单独的私有字段字段支持 属性.
tonicFrequency 的 set 实现正在为自身设置一个值,因此程序进入无限循环。
您必须为 Wave class 编写如下代码。
public abstract class Wave
{
private float _tonicFrequency;
//simple wave properties
public float tonicFrequecy
{
get { return _tonicFrequency; }
set
{
if (value > 24000f)
{
_tonicFrequency = 24000f;
}
else
{
_tonicFrequency = value;
}
}
}
public float tonicAmplitude { get; set; }
}
我正在创建一个程序,它应该创建一个带有音符泛音的列表并将它们显示在控制台上。该程序运行时没有编译器错误,但输出不是预期的,我似乎不明白为什么。稍后我会添加其他功能,但首先我想完成这项工作。主要方法如下所示:
public static void Main (string[] args)
{
//test method before object instance
Console.WriteLine ("Test 1");
//creates object instance with frequency = 110f
CompositeWave myWave = new CompositeWave (110f);
//test method after object instance
Console.WriteLine ("Test 2");
//CompositeWave method that adds items to overtoneWavesList
myWave.createNaturalOvertones();
//prints all overtone frequencies in order
foreach (KeyValuePair<byte,SineWave> valuePair in myWave.overtoneWavesList) {
Console.WriteLine (valuePair.Key + " - " + valuePair.Value.tonicFrequecy);
}
}
预期的输出应该类似于
/*
* Test 1
* Test 2
* 0 - 220
* 1 - 330
* 2 - 440
* 3 - 550
* ... so on
* /
但输出只是
/*
* Test 1
* /
并且该计划永远不会完成,也不会再进一步。
这些是我在命名空间中使用的 classes(它们仍然具有未实现的功能,例如波的振幅):
声波的基本class(频率不能高于24K,因为那样就听不见了):
/// <summary>
/// Basic sound wave class.
/// </summary>
public abstract class Wave
{
//simple wave properties
public float tonicFrequecy
{
get
{
return tonicFrequecy;
}
set
{
if (value > 24000f) {
tonicFrequecy = 24000f;
} else {
tonicFrequecy = value;
}
}
}
public float tonicAmplitude { get; set;}
}
从基波class导出的正弦波class:
/// <summary>
/// Simple sine wave with frequency spectrum concentred in only one fundamental frequency.
/// </summary>
public class SineWave : Wave
{
//initializer
public SineWave (float frequency = 440f, float amplitude = 0f)
{
this.tonicFrequecy = frequency;
this.tonicAmplitude = amplitude;
}
}
以及从基波 class 派生的复合波 class(我在 Main 方法中实例化):
/// <summary>
/// Complex sound wave composed of multiple sine waves with different frequencies and amplitudes.
/// </summary>
public class CompositeWave : Wave
{
//initializer
public CompositeWave (float frequency = 440f, float amplitude = 0f)
{
this.tonicFrequecy = frequency;
this.tonicAmplitude = amplitude;
this.overtoneWavesList = new SortedList<byte, SineWave>(1);
}
//overtone list that compose the composite wave
public SortedList<byte,SineWave> overtoneWavesList { get; set;}
/// <summary>
/// Creates possible natural overtones and sets all amplitudes to zero.
/// </summary>
public void createNaturalOvertones ()
{
float overtoneFrequency = 0f;
for (byte i = 2; overtoneFrequency <= 24000f; i++) {
//sets overtone frequency as multiple of fundamental
overtoneFrequency = this.tonicFrequecy * (float)i;
//sets list key and add overtone to list
int key = (int)i - 2;
this.overtoneWavesList.Add ((byte)key, new SineWave(overtoneFrequency));
}
}
}
我已经尝试了几乎所有的方法,但不明白为什么它没有比测试 1 更进一步:( 我知道这是一个很长 post 的简单问题,对此我深表歉意,但在此先感谢您的任何答复!
您可能在构建 CompositeWave
实例期间遇到 Whosebug 异常,因为您的 tonicFrequency
属性 是自引用的:
public float tonicFrequecy
{
get
{
return tonicFrequecy; // this points back to itself
}
A 属性 是对 class 数据的抽象 - 它不为 class 数据提供实际的 存储 。您需要在 class 中有一个单独的字段用于存储。例如:
private float _tonicFrequency; // this private field stores the data
// the property uses the private field for storage
public float tonicFrequency {
get { return _tonicFrequency; }
set { if (value > 24000f) _tonicFrequency = 24000f; else _tonicFrequency = value; }
}
在 auto-properties 的情况下(就像你的 tonicAmplitude
),你没有这个问题,因为编译器会自动为你添加一个内部字段——但肯定有一个单独的私有字段字段支持 属性.
tonicFrequency 的 set 实现正在为自身设置一个值,因此程序进入无限循环。
您必须为 Wave class 编写如下代码。
public abstract class Wave
{
private float _tonicFrequency;
//simple wave properties
public float tonicFrequecy
{
get { return _tonicFrequency; }
set
{
if (value > 24000f)
{
_tonicFrequency = 24000f;
}
else
{
_tonicFrequency = value;
}
}
}
public float tonicAmplitude { get; set; }
}