c# Base關(guān)鍵字的使用

2020-01-24 03:45:52

字體：大中小

供稿：網(wǎng)友

using System; 
using System.Collections.Generic; 
using System.Text; 
namespace ConsoleApplication1 
{ 
class 繼承1 
{ 
//virtual虛函數(shù),這樣寫便于子類重寫 
public virtual double Area(double a) 
{ 
return a * 2; 
} 
} 
class Test : 繼承1 
{ 
//重寫父類的Area,當(dāng)然也可以調(diào)用父類的Area方法 
public override double Area(double b) 
{ 
//關(guān)鍵字base.Area()調(diào)用了父類的Area方法 
return base.Area(b) * 0.9; 
} 
} 
class Result 
{ 
static void Main() 
{ 
Test TT = new Test(); 
Console.WriteLine(TT.Area(10)); 
} 
} 
}

復(fù)制代碼代碼如下:

using System; 
using System.Collections.Generic; 
using System.Text; 
namespace ConsoleApplication1 
{ 
class Class4 
{ 
//申明2個(gè)構(gòu)造函數(shù) 
public Class4() 
{ 
Console.WriteLine("Class4"); 
} 
int i; 
public Class4(int a) 
{ 
i=a; 
Console.WriteLine("Class:{0}", i); 
} 
public void SS() 
{ 
Console.WriteLine("BOSS"); 
} 
} 
class Test:Class4 
{ 
//調(diào)用父類(無參數(shù)的)構(gòu)造函數(shù) 
public Test() 
: base() 
{ 
} 
//調(diào)用父類(有參數(shù)的)構(gòu)造函數(shù) 
public Test(int a) 
: base(a) 
{ 
base.SS(); 
} 
} 
class TT 
{ 
static void Main() 
{ 
Test T = new Test(); 
Test T1 = new Test(10); 
} 
} 
}