C# ----- class

C#是一种面向对象编程的语言，所以类的运用是非常实用的。class的使用与c++基本一样，下面可以看一下C#对于class类的使用例程

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class student
    {
        private int age=5;
        public int Age
        {
            get{return age;}
            set { if (value >= 0) age = value; }
        }
    }
    class rectangle
    {
        double length, width;
        public void create(double x,double y)
        {
            length = x;
            width = y;
        }
        public double getArea()
        {
            return (length * width);
        }
        public void show()
        {
            Console.WriteLine("Length={0},width={1},Area={2}",length,width,getArea());
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            student s=new student();
            s.Age = 63;
            Console.WriteLine("age={0}", s.Age);
            rectangle r1=new rectangle();
            r1.create(12.5, 8.2);
            r1.getArea();
            r1.show();
            Console.ReadKey();
        }
    }
}

运行结果：

age=63
Length=12.5,width=8.2,Area=102.5

End. 谢谢！