49 lines
1.3 KiB
C#
49 lines
1.3 KiB
C#
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namespace Lesson8_封装_静态类和静态构造函数练习
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{
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static class Calc
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{
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private static float PI = 3.1415926f;
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public static float CalcCirclePerimeter(int r)
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{
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return PI * r * 2;
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}
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public static float CalcCircleArea(int r)
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{
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return PI * r * r;
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}
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public static int CalcRectanglePerimeter(int h,int w)
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{
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return (h + w) * 2;
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}
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public static int CalcRectangleArea(int h, int w)
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{
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return h * w;
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}
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public static int Absolute(int num)
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{
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if (num < 0)
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{
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return -num;
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}
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else
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{
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return num;
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}
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}
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}
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internal 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("Hello, World!");
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Console.WriteLine(Calc.CalcRectanglePerimeter(5,10));
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Console.WriteLine(Calc.CalcRectangleArea(5, 10));
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Console.WriteLine(Calc.CalcCirclePerimeter(3));
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Console.WriteLine(Calc.CalcCircleArea(3));
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Console.WriteLine(Calc.Absolute(123));
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Console.WriteLine(Calc.Absolute(-321));
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}
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}
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}
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