C＃簡單傳遞參數問題

Question

我知道我聽起來像一個糟糕的程序員現在 - 但我是新的，我不知道如何使用這個參考事物和傳遞參數，我的意思是我知道如何去做 - 但在同一時間 - 這是行不通的，我不知道爲什麼。

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'是一個眼睛。 是的，我知道我可以在不到一半的條件下完成這項工作。 是的，我知道這是一個簡單的問題。 是的我知道我很糟糕，但我想虛心請求任何人幫助我停止失去頭髮。

Answer 1

您必須聲明你的方法是這樣的：

private static void DealCard(ref string card) 

基本方法必須接受ref參數。

這裏是文檔，以支持該回答：

Value Type Parameters

Reference Type Parameters

Answer 2

您的代碼可以是這樣的

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); 
    } 
}