35 lines
981 B
C#
35 lines
981 B
C#
using System;
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namespace _5_1
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{
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class MyMath
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{
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public const double PI = 3.1415926;
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public static double perimeter(double r)
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{
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double p = 2 * PI * r;
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return p;
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}
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public static double area(double r)
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{
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double a = PI * r * r;
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return a;
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}
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public static double volume(double r)
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{
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double v = (4.0 / 3) * PI * r * r * r;
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return v;
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}
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public class Program
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{
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static void Main(string[] args)
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{
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Console.WriteLine("请输入半径：\n");
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double r = Convert.ToDouble(Console.ReadLine());
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Console.WriteLine("圆的周长为：{0}\n", MyMath.perimeter(r));
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Console.WriteLine("圆的面积为：{0}\n", MyMath.area(r));
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Console.WriteLine("球的体积为：{0}\n", MyMath.volume(r));
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}
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}
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}
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}
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