此代码应该输出说
的行trex（2腿）恐龙（灭绝）
获取从文件中获取的动物列表。 如果动物没有灭绝，则会被if语句跳过。
一切正常，除了最后一点，应该说（灭绝）。
相反，它说＆＃34;是＆＃34;或＆＃34;假＆＃34;取决于我如何设置isExtinct属性。现在我已将if语句放入isExtinct属性中以输出＆＃34; extinct＆＃34;但我在编译后得到错误
Stacktrace:
Native stacktrace:
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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)
以下代码
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);
}
}
}
答案 0 :(得分：2)
快速修复
好timestamp属性看起来像个问题......试试这个：
isExtinct应该修复它，但我想你可能想考虑清理......
清理
例如，我认为根本没有吸气剂。只需在public string isExtinct
{
get { return extinct ? "extinct" : "" }
}
方法中执行逻辑（因为这可能是唯一需要使用它的地方），然后您也可以使括号成为条件。类似的东西：
ToString建议代码
此外，您的属性public override string ToString()
{
string result = String.Format("{0} ({1} legged) {2}", species, legs, genus);
if(extinct)
result += " (extinct)";
return result;
}
，Species和Legs没有任何用处，无论如何它们都与您的字段无关。我建议删除字段并坚持使用4个属性：
Genus答案 1 :(得分：2)
您的属性逻辑错误 - 您不希望两个单独的可写属性和语法不正确。
试试这个：
public string isExtinct {
get
{
if (extinct == true) {
return "extinct";
} else {
return "";
}
}
}