C# 得到一个我不知道的非常奇怪的逻辑错误'；我不明白

这段代码应该输出这样的行

特雷克斯（双腿）恐龙（已灭绝）

获取从文件中获取的动物列表。 如果动物没有灭绝，If语句将跳过它

一切正常，除了最后一点，应该是（灭绝）

相反，它说“true”或“false”，这取决于我如何设置isExtinct属性

现在，我在isExtinct属性中放入了一个if语句以输出“灭绝”，但编译后出现了一个错误

Stacktrace:


Native stacktrace:

mono() [0x8105b4a]
mono() [0x8153274]
mono() [0x806a20b]
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mono() [0x8153224]
mono() [0x806a20b]
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Debug info from gdb:


=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================

Aborted (core dumped)

代码如下

class MainClass
{
    public static void Main (string[] args)
    {

        StreamReader input = new StreamReader ("animals.txt");

        while (!input.EndOfStream) {    
            string line = input.ReadLine ();
            string[] data = line.Split (',');
            if (data [3] == "true") {
                Animal myAnimal = new Animal (data[0], Convert.ToInt32(data[1]), data[2], Convert.ToBoolean(data[3]));
                Console.WriteLine (myAnimal);
                }
        }
    }
}
}

public class Animal
{
    string species;
    int legs;
    string genus;
    bool extinct;

    public Animal (string species, int legs, string genus, bool extinct)
    {
        this.species = species;
        this.legs = legs;
        this.genus = genus;
        this.extinct = extinct;
    }

    public string Species{ get; set;}
    public int Legs{ get; set;}
    public string Genus{ get; set;}
    public string isExtinct{ 
        get
        {
            return isExtinct;
        }
        set 
        {
            if (extinct == true) {
                isExtinct = "extinct";
            } else {
                isExtinct = "";
            }
        }
    }

    public override string ToString(){
        return String.Format("{0} ({1} legged) {2} ({3})", species, legs, genus, isExtinct);
    }
}
}

---

快速修复

嗯，

isExtinct

属性看起来像个问题。。。试试这个：

public string isExtinct
{
    get { return extinct ? "extinct" : "" }
}

<>这应该解决问题，但我想你可能想考虑一下清理……p>

---

清理

例如，我认为根本没有getter。只需执行

ToString

方法中的逻辑（因为这可能是唯一需要使用它的地方），然后也可以使括号有条件。比如：

public override string ToString()
{
    string result = String.Format("{0} ({1} legged) {2}", species, legs, genus);
    if(extinct)
        result += " (extinct)";

    return result;
}

---

建议代码

此外，您的属性

种类

、

腿

、和

属

没有任何用处，它们与您的字段没有任何关联。我建议删除字段，只保留4个属性：

public string Species{ get; set;}
public int Legs{ get; set;}
public string Genus{ get; set;}
public string IsExtinct { get; set;}

public Animal (string species, int legs, string genus, bool isExtinct)
{
    Species = species;
    Legs = legs;
    Genus = genus;
    IsExtinct = isExtinct;
}

public override string ToString()
{
    string result = String.Format("{0} ({1} legged) {2}", Species, Legs, Genus);
    if(IsExtinct )
        result += " (extinct)";

    return result;
}

---

快速修复

嗯，

isExtinct

属性看起来像个问题。。。试试这个：

public string isExtinct
{
    get { return extinct ? "extinct" : "" }
}

<>这应该解决问题，但我想你可能想考虑一下清理……p>

---

清理

例如，我认为根本没有getter。只需执行

ToString

方法中的逻辑（因为这可能是唯一需要使用它的地方），然后也可以使括号有条件。比如：

public override string ToString()
{
    string result = String.Format("{0} ({1} legged) {2}", species, legs, genus);
    if(extinct)
        result += " (extinct)";

    return result;
}

---

建议代码

此外，您的属性

种类

、

腿

、和

属

没有任何用处，它们与您的字段没有任何关联。我建议删除字段，只保留4个属性：

public string Species{ get; set;}
public int Legs{ get; set;}
public string Genus{ get; set;}
public string IsExtinct { get; set;}

public Animal (string species, int legs, string genus, bool isExtinct)
{
    Species = species;
    Legs = legs;
    Genus = genus;
    IsExtinct = isExtinct;
}

public override string ToString()
{
    string result = String.Format("{0} ({1} legged) {2}", Species, Legs, Genus);
    if(IsExtinct )
        result += " (extinct)";

    return result;
}

---

您的属性逻辑错误-您不希望有两个单独的可写属性，并且语法不正确

试试这个：

public string isExtinct { 
        get
        {
            if (extinct == true) {
                return "extinct";
            } else {
                return "";
            }        
        }
}

---

您的属性逻辑错误-您不希望有两个单独的可写属性，并且语法不正确

试试这个：

public string isExtinct { 
        get
        {
            if (extinct == true) {
                return "extinct";
            } else {
                return "";
            }        
        }
}

---

第一个猜测是，你肯定只需要一个获得者。。使用“set”信息，例如如果为true，则返回“execute”，如果为空，则返回“empty”。您会得到一个

StackOverflowException

，因为

isExtinct

的getter返回

isExtinct

（相同的属性），从而导致无限递归。首先猜测是isExtinct肯定您只需要一个getter。。使用“set”信息，例如如果为true，则返回“execute”，如果为空，则返回“empty”。您将获得一个

StackOverflowException

，因为

isExtinct

的getter返回

isExtinct

（相同的属性），从而导致无限递归。谢谢。我不得不在末尾加上set{}。出于某种原因，C#不允许使用空集；陈述天哪，我想念爪哇@hggohh-C#允许属性没有

集

。你有错误吗？这很有效，谢谢。我不得不在末尾加上set{}。出于某种原因，C#不允许使用空集；陈述天哪，我想念爪哇@hggohh-C#允许属性没有

集

。你有错误吗？我同意这一点，通常不会在属性中应用逻辑，但我被指示在这里。来自java，我刚刚添加了一个方法来比较2，然后通过…public override String toString（）{}将输出管道化。我同意这一点，通常不会在属性中应用逻辑，但这里已经指示我。来自java，我刚刚添加了一个方法来比较2，然后通过…public override String toString（）{}管道输出