public int Continue():(不是所有代码路径都返回值)

Question

我已经编写了这个函数，将其用于另一个类，但是代码生成了一个错误，并说:不是所有的代码路径都返回值。我也试着去寻找这个问题的解决方案，但大多数的答案都与实际问题无关。希望能碰到对这类错误的逻辑理解。

using System;
namespace Practice
{
class ContinueAgain
{
public int Continue()    //    (Not all code paths return a value)
{
rerun:
try {
char chAgain;
//  user guiding message and then taking input
Console.WriteLine("nAgain? (y/n)n");
chAgain = char.Parse(Console.ReadLine());
//  filtering the condition if the user wants to continue or not
//  exiting out of the method if user selects 'Y'/'y'
if (chAgain == 'y' || chAgain == 'Y')   //  if block begins
{
return 1;
}
//  exiting out of the method if user selects 'N'/'n'
else if (chAgain == 'n' || chAgain == 'N')
{
Console.WriteLine("nThank you for using :)n");
return 0;
}
// printing user message if user enters any input apart from the asked input
if(chAgain!='y' || chAgain!='Y' || chAgain!='n' || chAgain!='N')
{
Console.WriteLine("nThis input in invalidn");
goto rerun;
}
#endregion if block 4 - ends
}   //  try block ends
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
}
}

想知道是什么导致或触发了这个错误事件。

Answer 1

您需要在catch块内和try块末尾返回一个值。

Answer 2

您的代码中缺少2个返回语句-在最后一个if语句之后和在catch块