我正在用C＃做一个热土豆游戏。在代码中我试图处理Game（）方法中的异常，它会提示你将马铃薯传递给某人（通过他们的玩家号码）它会阻止你输入你自己的玩家号码（试图将它传递给你自己。） 唯一的问题是，我在尝试处理异常时遇到了麻烦：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace HotPotatoe
{
class Program
{
public static void Main()
{
Console.Clear();
Console.Write("How many players are there? (up to 4): ");
string PlayerCount = Console.ReadLine();
string PlayerOne = null;
string PlayerTwo = null;
string PlayerThree = null;
string PlayerFour = null;
if (PlayerCount == "2")
{
Console.Write("Enter player 1's name: ");
PlayerOne = Console.ReadLine();
Console.Write("Enter player 2's name: ");
PlayerTwo = Console.ReadLine();
Random ran = new Random();
int WhoStarts = ran.Next(1, 2);
Game(PlayerOne, PlayerTwo, PlayerThree, PlayerFour, WhoStarts);
}
else if (PlayerCount == "3")
{
Console.Write("Enter player 1's name: ");
PlayerOne = Console.ReadLine();
Console.Write("Enter player 2's name: ");
PlayerTwo = Console.ReadLine();
Console.Write("Enter player 3's name: ");
PlayerThree = Console.ReadLine();
Random ran = new Random();
int WhoStarts = ran.Next(1, 3);
Game(PlayerOne, PlayerTwo, PlayerThree, PlayerFour, WhoStarts);
}
else if (PlayerCount == "4")
{
Console.Write("Enter player 1's name: ");
PlayerOne = Console.ReadLine();
Console.Write("Enter player 2's name: ");
PlayerTwo = Console.ReadLine();
Console.Write("Enter player 3's name: ");
PlayerThree = Console.ReadLine();
Console.Write("Enter player 4's name: ");
PlayerFour = Console.ReadLine();
Random ran = new Random();
int WhoStarts = ran.Next(1, 4);
Game(PlayerOne,
PlayerTwo,
PlayerThree,
PlayerFour,
WhoStarts);
}
else
{
Console.WriteLine("Not valid!");
Console.ReadKey();
Main();
}
}
private static void Game
(string player1,
string player2,
string player3,
string player4,
int whoStarts)
{
Player Player1 = new Player();
Player Player2 = new Player();
Player Player3 = new Player();
Player Player4 = new Player();
Player1.Name = player1;
Player2.Name = player2;
Player3.Name = player3;
Player4.Name = player4;
Player1.Number = 1;
Player2.Number = 2;
Player3.Number = 3;
Player4.Number = 4;
Player1.IsOut = false;
Player2.IsOut = false;
if(Player3.Name == null)
{
Player3.IsOut = true;
}
else
{
Player3.IsOut = false;
}
if (Player4.Name == null)
{
Player4.IsOut = true;
}
else
{
Player3.IsOut = false;
}
switch (whoStarts)
{
case 1:
Player1.HasPotatoe = true;
break;
case 2:
Player2.HasPotatoe = true;
break;
case 3:
Player3.HasPotatoe = true;
break;
default:
Player4.HasPotatoe = true;
break;
}
List<Player> PlayingList = new List<Player>
{
Player1,
Player2
};
if (Player3.IsOut == false)
{
PlayingList.Add(Player3);
}
if (Player4.IsOut == false)
{
PlayingList.Add(Player4);
}
Random rand = new Random();
int NumOfRounds = rand.Next(1, 10);
do
{
foreach (Player p in PlayingList)
{
if (p.HasPotatoe == true)
{
Console.Write("Player {0} has the potatoe! Who do you want to pass it to? (by number): ", p.Number);
string input = Console.ReadLine();
if (input == "1")
{
PlayingList[0].HasPotatoe = true;
NumOfRounds--;
}
else if (input == "2")
{
PlayingList[1].HasPotatoe = true;
NumOfRounds--;
}
else if (input == "3")
{
if (Player3.IsOut == true)
{
Console.WriteLine("That person isn't playing! Choose another player!");
Console.ReadKey();
}
else
{
PlayingList[2].HasPotatoe = true;
NumOfRounds--;
}
}
else if (input == "4")
{
if (Player4.IsOut == true)
{
Console.WriteLine("That person isn't playing! Choose another player!");
Console.ReadKey();
}
else
{
PlayingList[3].HasPotatoe = true;
NumOfRounds--;
}
}
else if(input == p.Number.ToString()) // this is the part i'm having trouble with................................
{
Console.WriteLine("{0}", p.Number.ToString());
Console.WriteLine("You can't pass it to yourself! -_- Choose someone else..." + p.Number.ToString());
Console.ReadKey();
}
}
}
} while (NumOfRounds != 0);
if(Player1.HasPotatoe == true)
{
Console.WriteLine("{0} is out! Play again!", Player1.Name);
Console.ReadKey();
Main();
}
else if(Player2.HasPotatoe == true)
{
Console.WriteLine("{0} is out! Play again!", Player2.Name);
Console.ReadKey();
Main();
}
else if (Player3.HasPotatoe == true)
{
Console.WriteLine("{0} is out! Play again!", Player3.Name);
Console.ReadKey();
Main();
}
else if (Player4.HasPotatoe == true)
{
Console.WriteLine("{0} is out! Play again!", Player4.Name);
Console.ReadKey();
Main();
}
}
}
class Player
{
public string Name { get; set; }
public int Number { get; set; }
public bool HasPotatoe { get; set; }
public bool IsOut { get; set; }
}
}
错误的具体部分：
Random rand = new Random();
int NumOfRounds = rand.Next(1, 10);
do
{
foreach (Player p in PlayingList)
{
if (p.HasPotatoe == true)
{
Console.Write("Player {0} has the potatoe! Who do you want to pass it to? (by number): ", p.Number);
string input = Console.ReadLine();
if (input == "1")
{
PlayingList[0].HasPotatoe = true;
NumOfRounds--;
}
else if (input == "2")
{
PlayingList[1].HasPotatoe = true;
NumOfRounds--;
}
else if (input == "3")
{
if (Player3.IsOut == true)
{
Console.WriteLine("That person isn't playing! Choose another player!");
Console.ReadKey();
}
else
{
PlayingList[2].HasPotatoe = true;
NumOfRounds--;
}
}
else if (input == "4")
{
if (Player4.IsOut == true)
{
Console.WriteLine("That person isn't playing! Choose another player!");
Console.ReadKey();
}
else
{
PlayingList[3].HasPotatoe = true;
NumOfRounds--;
}
}
else if(input == p.Number.ToString()) // this is where the problem is...
{
Console.WriteLine("{0}", p.Number.ToString());
Console.WriteLine("You can't pass it to yourself! -_- Choose someone else..." + p.Number.ToString());
Console.ReadKey();
}
}
}
} while (NumOfRounds != 0);
基本上我说：if（input == p.Number（）。ToString（））// p.Number（）== player＆＃39; s number 然后抛出异常。但我不确定该怎么做。我尝试使用.ToString（）方法将整数转换为字符串。但它似乎没有改变任何东西。我也尝试使用Int32.Parse（输入）方法将输入转换为32位整数，但仍然没有运气。结果只是随机做了一些事情。例如，如果我是玩家二，并且我提示将马铃薯传递给玩家二，那么它只会写入控制台，玩家2一遍又一遍地吃马铃薯。我不确定如何做到这一点。有什么建议吗？
答案 0 :(得分：0)
else if(input == p.Number.ToString())
throw new Exception("You cant do that");
也许您的问题是创建自己的异常以便以后捕获它们。做
public class BadPlayerException: Exception
{
}
...
throw new BadPlayerEcxeption():