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Please answer the questions about ＃ C ＃!

2022-02-04 16:41:45 【CSDN Q & A】

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Beginners C＃ Be more detailed



Take the answer ：

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using System;namespace ConsoleApp1{    public class Circle    {        /// <summary>        ///  radius         /// </summary>        public double R { get; set; }        public static int nums { get; set; }        public Circle(int R) {            this.R = R;            Circle.nums++;        }        public double Area() {            return Math.PI * Math.Pow(R,2);        }    }    class Program    {        static void Main(string[] args) {            var circle = new Circle(5);            Console.WriteLine(" area ：" + circle.Area());            Console.WriteLine(" Number of round real cases ：" + Circle.nums);            circle = new Circle(6);            Console.WriteLine(" area ：" + circle.Area());            Console.WriteLine(" Number of round real cases ：" + Circle.nums);            Console.ReadKey();        }    }}

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