C#是一种面向对象的编程语言,在面向对象的编程方法中,程序由各种对象组成,对象采取的操作称为方法,同类的对象被称为具有相同的类型,或者被称为在相同的类。<//p>
例如,让无涯教程考虑一个矩形对象,它具有长度和宽度等属性。根据设计的不同,可能需要接受这些属性值、计算面积和显示详细信息的方法。<//p>
看看Rectangle类的实现并讨论C#基本语法-<//p>
using<//span> <//span>System<//span>; ////using 导入库<//span>
<//span>namespace<//span> <//span>RectangleApplication<//span> <//span>{<//span>
<//span>class<//span> <//span>Rectangle<//span> <//span>{ ////声明类<//span>
<//span>////类变量<//span>
<//span>double<//span> length<//span>;<//span>
<//span>double<//span> width<//span>;<//span>
<//span>public<//span> <//span>void<//span> <//span>Acceptdetails<//span>()<//span> <//span>{<//span>
length <//span>=<//span> <//span>4.5<//span>;<//span>
width <//span>=<//span> <//span>3.5<//span>;<//span>
<//span>}<//span>
<//span>public<//span> <//span>double<//span> <//span>GetArea<//span>()<//span> <//span>{<//span>
<//span>return<//span> length <//span>*<//span> width<//span>;<//span>
<//span>}<//span>
<//span>public<//span> <//span>void<//span> <//span>Display<//span>()<//span> <//span>{<//span>
<//span>Console<//span>.<//span>WriteLine<//span>(<//span>"Length: {0}"<//span>,<//span> length<//span>);<//span>
<//span>Console<//span>.<//span>WriteLine<//span>(<//span>"Width: {0}"<//span>,<//span> width<//span>);<//span>
<//span>Console<//span>.<//span>WriteLine<//span>(<//span>"Area: {0}"<//span>,<//span> <//span>GetArea<//span>());<//span>
<//span>}<//span>
<//span>}<//span>
<//span>class<//span> <//span>ExecuteRectangle<//span> <//span>{<//span>
<//span>static<//span> <//span>void<//span> <//span>Main<//span>(<//span>string<//span>[]<//span> args<//span>)<//span> <//span>{<//span>
<//span>Rectangle<//span> r <//span>=<//span> <//span>new<//span> <//span>Rectangle<//span>(); ////实例化Rectangle<//span>
r<//span>.<//span>Acceptdetails<//span>(); ////调用Rectangl方法<//span>
r<//span>.<//span>Display<//span>();<//span>
<//span>Console<//span>.<//span>ReadLine<//span>();<//span>
<//span>}<//span>
<//span>}<//span>
<//span>}<//span><//pre>编译并执行上述代码时,将生成以下输出-<//p>
无涯教程网<//a><//p>Length<//span>:<//span> <//span>4.5<//span>
<//span>Width<//span>:<//span> <//span>3.5<//span>
<//span>Area<//span>:<//span> <//span>15.75<//span><//pre>任何C#程序中的第一个语句是<//p>
using<//span> <//span>System<//span>;<//span><//pre>using<//span>关键字用于在程序中包含命名空间,一个程序可以包含多个USING语句。<//p>注释用于解释代码。编译器忽略注释条目,C#程序中的多行注释以//*开头,以字符*//结束,如下所示:-<//p>
链接:https:////www.learnfk.comhttps:////www.learnfk.com//csharp//csharp-basic-syntax.html<//a> <//p>