21點遊戲中需要撲克牌，四種花色，每種花色1-13張，分別為1,2,3,4,5,6,7,8,9,10,J,Q,K，共52張。
我們先將一張撲克牌定義為Card物件，並定義其屬性為花色和點數。
class Card
{
public string Suit { get; set; }
public int Rank { get; set; }
// Card建構函數
public Card(string suit, int rank)
{
Suit = suit; //花色
Rank = rank; //點數
}
// 覆寫ToString()方法來顯示撲克牌訊息
public override string ToString()
{
string suitName = "";
switch(Suit)
{
case "S":
suitName = "黑桃";
break;
case "H":
suitName = "紅心";
break;
case "D":
suitName = "方塊";
break;
case "C":
suitName = "梅花";
break;
}
return $"{suitName}{Rank}";
}
}
再建立一副牌共52張，並設定其花色與點數，再顯示到畫面上，以下為完整程式碼
default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server" Text=""></asp:Label>
</div>
</form>
</body>
</html>
default.aspx.cs
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string[] suits = { "S" , "H" , "D" , "C"}; //"S黑桃" , "H紅心" , "D方塊" , "C梅花"
Card[] cards = new Card[52]; //一副牌52張
int index = 0;
for(int i=0; i<suits.Length; i++) //四種花色
{
for(int j=1; j<=13; j++) //一種花色13張牌1-13
{
cards[index] = new Card(suits[i], j);
index++;
}
}
for(int i=0; i<cards.Length; i++)
{
if(i%13 == 0) //13張牌排成一行
{
Label1.Text += $"<br>{cards[i].ToString()}"; //換行
}
else
{
//Label1.Text += $"，{cards[i].ToString()}"; //Card class預設顯示方式
Label1.Text += $"，{cards[i].Suit}{cards[i].Rank}"; //自訂顯示方式
}
}
}
}
class Card
{
public string Suit { get; set; }
public int Rank { get; set; }
// Card建構函數
public Card(string suit, int rank)
{
Suit = suit; //花色
Rank = rank; //點數
}
// 覆寫ToString()方法來顯示撲克牌訊息
public override string ToString()
{
string suitName = "";
switch(Suit)
{
case "S":
suitName = "黑桃";
break;
case "H":
suitName = "紅心";
break;
case "D":
suitName = "方塊";
break;
case "C":
suitName = "梅花";
break;
}
return $"{suitName}{Rank}";
}
}
執行結果
