C＃简单传递参数问题

Question

我知道我听起来像一个糟糕的程序员现在 - 但我是新的，我不知道如何使用这个参考事物和传递参数，我的意思是我知道如何去做 - 但在同一时间 - 这是行不通的，我不知道为什么。

static void Main(string[] args) { 
    DealCard(ref card); 
    Console.WriteLine(); 
    Console.ReadLine(); 
} 

private static void DealCard(string card) { 
    string finalNum = ""; 
    string finalSuite = ""; 
    bool diffCard = false; 
    do { 
    Random cardPicker = new Random(); 
    int cardSuite = cardPicker.Next(1, 5); 
    if (cardSuite == 1) { 
     finalSuite = "Hearts"; 
    } else if (cardSuite == 2) { 
     finalSuite = "Spades"; 
    } else if (cardSuite == 3) { 
     finalSuite = "Clubs"; 
    } else if (cardSuite == 4) { 
     finalSuite = "Diamonds"; 
    } 

    int cardNum = cardPicker.Next(1, 14); 

    if (cardNum == 1) { 
     finalNum = "Ace"; 
    } else if (cardNum == 2) { 
     finalNum = "Two"; 
    } else if (cardNum == 3) { 
     finalNum = "Thre"; 
    } else if (cardNum == 4) { 
     finalNum = "Four"; 
    } else if (cardNum == 5) { 
     finalNum = "Five"; 
    } else if (cardNum == 6) { 
     finalNum = "Six"; 
    } else if (cardNum == 7) { 
     finalNum = "Seven"; 
    } else if (cardNum == 8) { 
     finalNum = "Eight"; 
    } else if (cardNum == 9) { 
     finalNum = "Nine"; 
    } else if (cardNum == 10) { 
     finalNum = "Ten"; 
    } else if (cardNum == 11) { 
     finalNum = "Jack"; 
    } else if (cardNum == 12) { 
     finalNum = "Queen"; 
    } else if (cardNum == 13) { 
     finalNum = "King"; 
    } 

    string newCard = finalNum + " of " + finalSuite; 

    if (newCard != card) { 
     card = finalNum + " of " + finalSuite; 
     diffCard = true; 
    } else { 

    } 
    card = newCard; 

    } while (diffCard == false); 
} 

是的我知道大量'如果'是一个眼睛。 是的，我知道我可以在不到一半的条件下完成这项工作。 是的，我知道这是一个简单的问题。 是的我知道我很糟糕，但我想虚心请求任何人帮助我停止失去头发。

Answer 1

您必须声明你的方法是这样的：

private static void DealCard(ref string card) 

基本方法必须接受ref参数。

这里是文档，以支持该回答：

Value Type Parameters

Reference Type Parameters

Answer 2

您的代码可以是这样的

public class Program 
{ 

    public static void Main(string[] args) { 
    string card = ""; 
    DealCard(ref card); 

} 

private static void DealCard(ref string card) 
{ 
    string finalNum = ""; 
    string finalSuite = ""; 
    bool diffCard = false; 
    do { 
     Random cardPicker = new Random(); 
     int cardSuite = cardPicker.Next(1, 5); 
     string[] suite = new String[]{"Hearts","Spades", "Clubs", "Diaminds"}; 


     int cardNum = cardPicker.Next(1, 3); 
     string[] numbers = new String[]{"one","two","three", "four"}; 



    string newCard = numbers[cardNum] + " of " + suite[cardSuite]; 

    if (newCard != card) { 
     card = finalNum + " of " + finalSuite; 
     diffCard = true; 
    } else { 

    } 
    card = newCard; 
     Console.WriteLine(newCard); 


    } while (diffCard == false); 
    } 
}