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----------------------------------------------------------------------Currency.cs
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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace ConsoleApplication4 { //类和结构相似 public struct Currency { private uint dollars; //元 private ushort cents; //分 public Currency(uint i, ushort s)//初始化构造函数 { this.dollars = i; this.cents = s; } public override string ToString() { return string.Format("{0}.{1,2:00}", dollars, cents); } //看情况选择是显示装换还是隐式转换,(uint和ushort都可以隐式转换为float) //重载运算符必须使用public static //implicit 隐式转换 //把Currency对象隐式转换为float类型 public static implicit operator float(Currency c) { return c.dollars + c.cents / 100.0f; } //explicit为显式转换 //把float对象显式转换为Currency类型 public static explicit operator Currency(float f) { checked//溢出则抛出异常 { uint i = (uint)f; ushort s = Convert.ToUInt16((f - i) * 100); return new Currency(i, s); } } } }
----------------------------------------------------------------------主程序
Currency c = new Currency(50, 35); float f = (float)(c); c = (Currency)f; Console.WriteLine(c.ToString()); Console.ReadKey();