求高手优化面向对象设计问题
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1 最近有高手给我和朋友出题，题目听上去不难，不过我和朋友作出的答案不能完全符合高手的要求，高手还嘲笑我们的设计非常地不面向对象，但又不给解释。百思不得其解，来此求救。以下是高手的问题，为抛砖引玉，将我们的答案一并列出。 2 3 要求如下： 4 １。设计一个简化的财务系统，要求根据公司毛收入，税收，捐献，确定其净收入。要求提供本月份的毛收入，税收，捐献，净收入，及年度至今的毛收入，税收，捐献，净收入。 5 ２。净收入 ＝ 毛收入 － 税收 － 捐献。 税收依收入分四档，自行确定税率。 捐献也依收入分四档，自行确定比率，计算方法类似税收。如果本年度捐献超过一个数额（最大捐献额），停止捐献。 6 ３。使用Ｃ#和面向对象设计。 7 ４。至少提供两个界面：财务界面，和收入计算界面。财务界面只提供一种方法： 计算财务； 收入计算提供三种方法：计算税收，计算捐献，计算净收入。计算财务可以提供本月份的毛收入，税收，捐献，净收入，及年度至今的毛收入，税收，捐献，净收入。计算财务的输入参数是一个公司的list. 8 ５。收入计算界面和基于它的类会被其它系统使用，设计时必须注意软件重用问题。 9 ６。税率和捐献比率及最大捐献额有可能改变。 10 ７。尽量减少使用条件判断（if/else, switch/case)来计算税收和捐献。 11 ８。为简化起见，不用考虑数据库和数据存储。假定数据已经存在。 12 9。其余自行决定。但系统必须简单易懂。程序中使用英文注释，非关键点可以不注释。 13 14 以下是我们的解答，共五个文件： 15 1. Company.cs 16 using System.Diagnostics; 17 18 namespace XCompany.Accounting.Service 19 { 20 public class Company 21 { 22 //In general, OOP prefers private and protected fields than public fields 23 private decimal grossIncomeThisMonth = 0.00m; //Optional: provide a default value 24 25 //Constrcutor 26 public Company() 27 { 28 } 29 30 //By implementing property, it will be easier to modify this class in the future. 31 //For example, if we decide to use different data type, or add more constraints etc. 32 33 //Property Name, auto implement for get/set 34 public string Name { get; set; } 35 36 //Property GrossIncomeThisMonth. 37 public decimal GrossIncomeThisMonth 38 { 39 get { return grossIncomeThisMonth; } 40 set 41 { 42 if (value < 0.00m) 43 Trace.WriteLine("Invalid value for Income."); 44 else 45 { 46 grossIncomeThisMonth = value; 47 48 } 49 } 50 } 51 //Property NetIncomeThisMonth, auto implement for get/set 52 public decimal NetIncomeThisMonth { get; set; } 53 //Property FundSupportThisMonth, auto implement for get/set 54 public decimal FundSupportThisMonth { get; set; } 55 //Property TaxThisMonth, auto implement for get/set 56 public decimal TaxThisMonth { get; set; } 57 58 // year to date 59 //Property GrossIncomeYearToDate, auto implement for get/set 60 public decimal GrossIncomeYearToDate { get; set; } 61 //Property NetIncomeYearToDate, auto implement for get/set 62 public decimal NetIncomeYearToDate { get; set; } 63 //Property FundSupportYearToDate, auto implement for get/set 64 public decimal FundSupportYearToDate { get; set; } 65 //Property TaxYearToDate, auto implement for get/set 66 public decimal TaxYearToDate { get; set; } 67 68 } 69 } 70 71 2. IAccounting.cs 72 using System.Collections.Generic; 73 74 namespace XCompany.Accounting.Service 75 { 76 // USE THIS INTERFACE 77 public interface IAccounting 78 { 79 List<Company> DoAccounting(List<Company> companyList); 80 } 81 } 82 83 3. Accounting.cs 84 using System.Collections.Generic; 85 using System.Diagnostics; 86 87 88 namespace XCompany.Accounting.Service 89 { 90 public class Accounting: IAccounting 91 { 92 private readonly ICalc accountingCalculator; 93 private List<Company> companies; 94 95 public Accounting() 96 { 97 //In case the tax rates change, modify the following array accordingly. 98 //Define an array of various Income Levels and tax rates, and fund contribution rates accordingly 99 decimal[,] incomeTaxNew = new decimal[3,4]{ {0.00m, 2000.00m, 3000.00m, 4000.00m}, {5.00m, 6.00m, 8.00m, 10.00m}, {0.00m, 1.00m, 2.00m, 3.00m} }; 100 decimal maxFund = 2000.00m; 101 102 accountingCalculator = new Calculator(incomeTaxNew, maxFund); 103 104 105 //If the tax rates and fund contribution rates keep intact, OK to use the default constructor. 106 //accountingCalculator = new Calculator(); 107 } 108 109 //Property Companies 110 public List<Company> Companies 111 { 112 get { return companies; } 113 set { companies = value; } 114 } 115 116 public List<Company> DoAccounting(List<Company> companyList) 117 { 118 try 119 { 120 Companies = companyList; 121 122 foreach (Company oneCompany in Companies) 123 { 124 // calcualte the company taxes for accounting 125 oneCompany.TaxThisMonth = accountingCalculator.CalcTax(oneCompany.GrossIncomeThisMonth); 126 // add company taxes to year to date for company 127 oneCompany.TaxYearToDate = oneCompany.TaxYearToDate + oneCompany.TaxThisMonth; 128 129 // calculate company fund contributions 130 oneCompany.FundSupportThisMonth = accountingCalculator.CalcFundSupport(oneCompany.GrossIncomeThisMonth, oneCompany.FundSupportYearToDate); 131 // add company contributions to year to date for company 132 oneCompany.FundSupportYearToDate = oneCompany.FundSupportYearToDate + oneCompany.FundSupportThisMonth; 133 134 // calculate company net income for period 135 oneCompany.NetIncomeThisMonth = accountingCalculator.CalcNetIncome(oneCompany.GrossIncomeThisMonth, oneCompany.FundSupportYearToDate); 136 // add company income for period to year to date for company 137 oneCompany.NetIncomeYearToDate = oneCompany.NetIncomeYearToDate + oneCompany.NetIncomeThisMonth; 138 139 } 140 } 141 catch (System.ApplicationException ex) 142 { 143 Trace.WriteLine(ex.ToString() ); 144 } 145 catch (System.Exception ex) 146 { 147 Trace.WriteLine(ex.ToString()); 148 } 149 150 return Companies; 151 } 152 } 153 } 154 155 4. ICalc.cs 156 namespace XCompany.Accounting.Service 157 { 158 public interface ICalc 159 { 160 decimal CalcTax(decimal grossIncomeThisMonth); 161 decimal CalcNetIncome(decimal grossIncomeThisMonth, decimal fundSupportYearToDate); 162 decimal CalcFundSupport(decimal grossIncomeThisMonth, decimal fundSupportYearToDate); 163 } 164 } 165 166 5. Calculator.cs 167 using System.Diagnostics; 168 169 namespace XCompany.Accounting.Service 170 { 171 // This class determines the amount of deductions to be made for 172 // company based on their income. Depending on the amount of 173 // income will determine the tax rate. 174 // The company will donate to a fund based on the amount of income, 175 // similar to the tax rate determination. However, once a maximum 176 // amount has been reached, the company will stop donation. 177 public class Calculator : ICalc 178 { 179 // local variables 180 181 //In case the tax rates change in the new year, modify the following array accordingly. 182 //Define an array of various Income Levels and tax rates, and fund contribution rates accordingly 183 public readonly decimal[,] IncomeTax = new decimal[3, 4] { { 0.00m, 2000.00m, 3000.00m, 4000.00m }, { 5.00m, 6.00m, 8.00m, 10.00m }, { 0.00m, 1.00m, 2.00m, 3.00m } }; 184 public readonly decimal MaxFund = 2000.00m; 185 186 // constructor. If no parameters are provided in the calling function, the constructor will use default tax rates. 187 public Calculator(decimal[,] _incomeTax = null, decimal _maxFund = 2000.00m) 188 { 189 if (_incomeTax != null) 190 IncomeTax = _incomeTax; 191 192 MaxFund = _maxFund; 193 } 194 195 //Create a custom exception class based on System.ApplicationException. 196 //It is a good practice to define a custom exception class for a specific application exception. 197 public class InvalidInputException : System.ApplicationException 198 { 199 // The default constructor needs to be defined 200 // explicitly now since it would be gone otherwise. 201 public InvalidInputException() 202 { 203 } 204 205 public InvalidInputException(string message) 206 : base(message) 207 { 208 } 209 } 210 211 212 /* 213 * class methods 214 */ 215 // The gross income determines the tax rate 216 public decimal GetTaxRate(decimal grossIncomeThisMonth) 217 { 218 decimal taxRate = 0.00m; 219 220 try 221 { 222 //It is not the way that CRA calculates our tax. However, since it is a demo, let's follow the way of the sample. 223 if (grossIncomeThisMonth >= IncomeTax[0, 3]) 224 { 225 taxRate = IncomeTax[1, 3]; 226 } 227 else if (grossIncomeThisMonth >= IncomeTax[0, 2]) 228 { 229 taxRate = IncomeTax[1, 2]; 230 } 231 else if (grossIncomeThisMonth >= IncomeTax[0, 1]) 232 { 233 taxRate = IncomeTax[1, 1]; 234 } 235 else if (grossIncomeThisMonth >= IncomeTax[0, 0]) 236 { 237 taxRate = IncomeTax[1, 0]; 238 } 239 else 240 { 241 //Report Error: Invalid Income amount. 242 throw new InvalidInputException("Error: Invalid gross income amount."); 243 244 } 245 } 246 catch (InvalidInputException ex) 247 { 248 Trace.WriteLine(ex.ToString()); 249 } 250 catch (System.ApplicationException ex) 251 { 252 Trace.WriteLine(ex.ToString()); 253 } 254 catch (System.Exception ex) 255 { 256 Trace.WriteLine(ex.ToString()); 257 } 258 259 return taxRate; 260 } 261 262 // The gross income determines the fund rate. 263 public decimal GetFundRate(decimal grossIncomeThisMonth, decimal fundSupportYearToDate) 264 { 265 decimal fundRate = 0.00m; 266 267 try 268 { //If it exceeds the maximum amount, stop contribution 269 if (fundSupportYearToDate >= MaxFund) 270 return 0.00m; 271 272 //Calculates rates based on income 273 if (grossIncomeThisMonth >= IncomeTax[0, 3]) 274 { 275 fundRate = IncomeTax[2, 3]; 276 } 277 else if (grossIncomeThisMonth >= IncomeTax[0, 2]) 278 { 279 fundRate = IncomeTax[2, 2]; 280 } 281 else if (grossIncomeThisMonth >= IncomeTax[0, 1]) 282 { 283 fundRate = IncomeTax[2, 1]; 284 } 285 else if (grossIncomeThisMonth >= IncomeTax[0, 0]) 286 { 287 fundRate = IncomeTax[2, 0]; 288 } 289 else 290 { 291 //Report Error: Invalid Income amount. 292 throw new InvalidInputException("Error: Invalid gross income amount."); 293 294 } 295 } 296 catch (InvalidInputException ex) 297 { 298 Trace.WriteLine(ex.ToString()); 299 } 300 catch (System.ApplicationException ex) 301 { 302 Trace.WriteLine(ex.ToString()); 303 } 304 catch (System.Exception ex) 305 { 306 Trace.WriteLine(ex.ToString()); 307 } 308 309 return fundRate; 310 } 311 312 313 // This method takes gross income, and returns tax. 314 virtual public decimal CalcTax(decimal grossIncomeThisMonth) 315 { 316 // declare and initialize variables 317 decimal taxRate = 0.00m; 318 decimal taxAmount = 0.00m; 319 320 // determine the Tax Rate to use 321 taxRate = GetTaxRate(grossIncomeThisMonth); 322 // calculate the tax amounts 323 taxAmount = (grossIncomeThisMonth * taxRate) / 100.00m; 324 325 // return the tax amount 326 return taxAmount; 327 } 328 329 // This method takes gross income, and returns fund contribution. 330 // Once the fund reaches the maximum amount, stop contribution. 331 virtual public decimal CalcFundSupport(decimal grossIncomeThisMonth, decimal fundSupportYearToDate) 332 { 333 // declare and initialize variables 334 decimal fundRate = 0.00m; 335 decimal fundAmount = 0.00m; 336 337 // determine the Tax Rate to use 338 fundRate = GetFundRate(grossIncomeThisMonth, fundSupportYearToDate); 339 // calculate the tax amounts 340 fundAmount = (grossIncomeThisMonth * fundRate) / 100.00m; 341 342 //If it exceeds the maximum amount, stop contribution 343 if ( (fundAmount+ fundSupportYearToDate) > MaxFund) 344 fundAmount = MaxFund - fundSupportYearToDate; 345 346 // return the contributed fund amount 347 return fundAmount; 348 } 349 350 351 // This method takes a Income, and return the net income 352 virtual public decimal CalcNetIncome(decimal grossIncomeThisMonth, decimal fundSupportYearToDate) 353 { 354 // declare and initialize variables 355 decimal tax = CalcTax(grossIncomeThisMonth); 356 357 // calculate the fund support 358 decimal fund = CalcFundSupport(grossIncomeThisMonth, fundSupportYearToDate); 359 360 // return the Income 361 return (grossIncomeThisMonth - tax - fund); 362 } 363 } 364 } 365 366 在计算税率时，还是使用了if/else.
最近有高手给我和朋友出题，题目听上去不难，不过我和朋友作出的答案不能完全符合高手的要求，高手还嘲笑我们的设计非常地不面向对象，但又不给解释。百思不得其解，来此求救。以下是高手的问题，为抛砖引玉，将我们的答案一并列出。 要求如下： １。设计一个简化的财务系统，要求根据公司毛收入，税收，捐献，确定其净收入。要求提供本月份的毛收入，税收，捐献，净收入，及年度至今的毛收入，税收，捐献，净收入。 ２。净收入 ＝ 毛收入 － 税收 － 捐献。 税收依收入分四档，自行确定税率。 捐献也依收入分四档，自行确定比率，计算方法类似税收。如果本年度捐献超过一个数额（最大捐献额），停止捐献。 ３。使用Ｃ#和面向对象设计。 ４。至少提供两个界面：财务界面，和收入计算界面。财务界面只提供一种方法： 计算财务； 收入计算提供三种方法：计算税收，计算捐献，计算净收入。计算财务可以提供本月份的毛收入，税收，捐献，净收入，及年度至今的毛收入，税收，捐献，净收入。计算财务的输入参数是一个公司的list. ５。收入计算界面和基于它的类会被其它系统使用，设计时必须注意软件重用问题。 ６。税率和捐献比率及最大捐献额有可能改变。 ７。尽量减少使用条件判断（if/else, switch/case)来计算税收和捐献。 ８。为简化起见，不用考虑数据库和数据存储。假定数据已经存在。 9。其余自行决定。但系统必须简单易懂。程序中使用英文注释，非关键点可以不注释。 以下是我们的解答，共五个文件： 1. Company.cs using System.Diagnostics; namespace XCompany.Accounting.Service { public class Company { //In general, OOP prefers private and protected fields than public fields private decimal grossIncomeThisMonth = 0.00m; //Optional: provide a default value //Constrcutor public Company() { } //By implementing property, it will be easier to modify this class in the future. //For example, if we decide to use different data type, or add more constraints etc. //Property Name, auto implement for get/set public string Name { get; set; } //Property GrossIncomeThisMonth. public decimal GrossIncomeThisMonth { get { return grossIncomeThisMonth; } set { if (value < 0.00m) Trace.WriteLine("Invalid value for Income."); else { grossIncomeThisMonth = value; } } } //Property NetIncomeThisMonth, auto implement for get/set public decimal NetIncomeThisMonth { get; set; } //Property FundSupportThisMonth, auto implement for get/set public decimal FundSupportThisMonth { get; set; } //Property TaxThisMonth, auto implement for get/set public decimal TaxThisMonth { get; set; } // year to date //Property GrossIncomeYearToDate, auto implement for get/set public decimal GrossIncomeYearToDate { get; set; } //Property NetIncomeYearToDate, auto implement for get/set public decimal NetIncomeYearToDate { get; set; } //Property FundSupportYearToDate, auto implement for get/set public decimal FundSupportYearToDate { get; set; } //Property TaxYearToDate, auto implement for get/set public decimal TaxYearToDate { get; set; } } } 2. IAccounting.cs using System.Collections.Generic; namespace XCompany.Accounting.Service { // USE THIS INTERFACE public interface IAccounting { List DoAccounting(List companyList); } } 3. Accounting.cs using System.Collections.Generic; using System.Diagnostics; namespace XCompany.Accounting.Service { public class Accounting: IAccounting { private readonly ICalc accountingCalculator; private List companies; public Accounting() { //In case the tax rates change, modify the following array accordingly. //Define an array of various Income Levels and tax rates, and fund contribution rates accordingly decimal[,] incomeTaxNew = new decimal[3,4]{ {0.00m, 2000.00m, 3000.00m, 4000.00m}, {5.00m, 6.00m, 8.00m, 10.00m}, {0.00m, 1.00m, 2.00m, 3.00m} }; decimal maxFund = 2000.00m; accountingCalculator = new Calculator(incomeTaxNew, maxFund); //If the tax rates and fund contribution rates keep intact, OK to use the default constructor. //accountingCalculator = new Calculator(); } //Property Companies public List Companies { get { return companies; } set { companies = value; } } public List DoAccounting(List companyList) { try { Companies = companyList; foreach (Company oneCompany in Companies) { // calcualte the company taxes for accounting oneCompany.TaxThisMonth = accountingCalculator.CalcTax(oneCompany.GrossIncomeThisMonth); // add company taxes to year to date for company oneCompany.TaxYearToDate = oneCompany.TaxYearToDate + oneCompany.TaxThisMonth; // calculate company fund contributions oneCompany.FundSupportThisMonth = accountingCalculator.CalcFundSupport(oneCompany.GrossIncomeThisMonth, oneCompany.FundSupportYearToDate); // add company contributions to year to date for company oneCompany.FundSupportYearToDate = oneCompany.FundSupportYearToDate + oneCompany.FundSupportThisMonth; // calculate company net income for period oneCompany.NetIncomeThisMonth = accountingCalculator.CalcNetIncome(oneCompany.GrossIncomeThisMonth, oneCompany.FundSupportYearToDate); // add company income for period to year to date for company oneCompany.NetIncomeYearToDate = oneCompany.NetIncomeYearToDate + oneCompany.NetIncomeThisMonth; } } catch (System.ApplicationException ex) { Trace.WriteLine(ex.ToString() ); } catch (System.Exception ex) { Trace.WriteLine(ex.ToString()); } return Companies; } } } 4. ICalc.cs namespace XCompany.Accounting.Service { public interface ICalc { decimal CalcTax(decimal grossIncomeThisMonth); decimal CalcNetIncome(decimal grossIncomeThisMonth, decimal fundSupportYearToDate); decimal CalcFundSupport(decimal grossIncomeThisMonth, decimal fundSupportYearToDate); } } 5. Calculator.cs using System.Diagnostics; namespace XCompany.Accounting.Service { // This class determines the amount of deductions to be made for // company based on their income. Depending on the amount of // income will determine the tax rate. // The company will donate to a fund based on the amount of income, // similar to the tax rate determination. However, once a maximum // amount has been reached, the company will stop donation. public class Calculator : ICalc { // local variables //In case the tax rates change in the new year, modify the following array accordingly. //Define an array of various Income Levels and tax rates, and fund contribution rates accordingly public readonly decimal[,] IncomeTax = new decimal[3, 4] { { 0.00m, 2000.00m, 3000.00m, 4000.00m }, { 5.00m, 6.00m, 8.00m, 10.00m }, { 0.00m, 1.00m, 2.00m, 3.00m } }; public readonly decimal MaxFund = 2000.00m; // constructor. If no parameters are provided in the calling function, the constructor will use default tax rates. public Calculator(decimal[,] _incomeTax = null, decimal _maxFund = 2000.00m) { if (_incomeTax != null) IncomeTax = _incomeTax; MaxFund = _maxFund; } //Create a custom exception class based on System.ApplicationException. //It is a good practice to define a custom exception class for a specific application exception. public class InvalidInputException : System.ApplicationException { // The default constructor needs to be defined // explicitly now since it would be gone otherwise. public InvalidInputException() { } public InvalidInputException(string message) : base(message) { } } /* * class methods */ // The gross income determines the tax rate public decimal GetTaxRate(decimal grossIncomeThisMonth) { decimal taxRate = 0.00m; try { //It is not the way that CRA calculates our tax. However, since it is a demo, let's follow the way of the sample. if (grossIncomeThisMonth >= IncomeTax[0, 3]) { taxRate = IncomeTax[1, 3]; } else if (grossIncomeThisMonth >= IncomeTax[0, 2]) { taxRate = IncomeTax[1, 2]; } else if (grossIncomeThisMonth >= IncomeTax[0, 1]) { taxRate = IncomeTax[1, 1]; } else if (grossIncomeThisMonth >= IncomeTax[0, 0]) { taxRate = IncomeTax[1, 0]; } else { //Report Error: Invalid Income amount. throw new InvalidInputException("Error: Invalid gross income amount."); } } catch (InvalidInputException ex) { Trace.WriteLine(ex.ToString()); } catch (System.ApplicationException ex) { Trace.WriteLine(ex.ToString()); } catch (System.Exception ex) { Trace.WriteLine(ex.ToString()); } return taxRate; } // The gross income determines the fund rate. public decimal GetFundRate(decimal grossIncomeThisMonth, decimal fundSupportYearToDate) { decimal fundRate = 0.00m; try { //If it exceeds the maximum amount, stop contribution if (fundSupportYearToDate >= MaxFund) return 0.00m; //Calculates rates based on income if (grossIncomeThisMonth >= IncomeTax[0, 3]) { fundRate = IncomeTax[2, 3]; } else if (grossIncomeThisMonth >= IncomeTax[0, 2]) { fundRate = IncomeTax[2, 2]; } else if (grossIncomeThisMonth >= IncomeTax[0, 1]) { fundRate = IncomeTax[2, 1]; } else if (grossIncomeThisMonth >= IncomeTax[0, 0]) { fundRate = IncomeTax[2, 0]; } else { //Report Error: Invalid Income amount. throw new InvalidInputException("Error: Invalid gross income amount."); } } catch (InvalidInputException ex) { Trace.WriteLine(ex.ToString()); } catch (System.ApplicationException ex) { Trace.WriteLine(ex.ToString()); } catch (System.Exception ex) { Trace.WriteLine(ex.ToString()); } return fundRate; } // This method takes gross income, and returns tax. virtual public decimal CalcTax(decimal grossIncomeThisMonth) { // declare and initialize variables decimal taxRate = 0.00m; decimal taxAmount = 0.00m; // determine the Tax Rate to use taxRate = GetTaxRate(grossIncomeThisMonth); // calculate the tax amounts taxAmount = (grossIncomeThisMonth * taxRate) / 100.00m; // return the tax amount return taxAmount; } // This method takes gross income, and returns fund contribution. // Once the fund reaches the maximum amount, stop contribution. virtual public decimal CalcFundSupport(decimal grossIncomeThisMonth, decimal fundSupportYearToDate) { // declare and initialize variables decimal fundRate = 0.00m; decimal fundAmount = 0.00m; // determine the Tax Rate to use fundRate = GetFundRate(grossIncomeThisMonth, fundSupportYearToDate); // calculate the tax amounts fundAmount = (grossIncomeThisMonth * fundRate) / 100.00m; //If it exceeds the maximum amount, stop contribution if ( (fundAmount+ fundSupportYearToDate) > MaxFund) fundAmount = MaxFund - fundSupportYearToDate; // return the contributed fund amount return fundAmount; } // This method takes a Income, and return the net income virtual public decimal CalcNetIncome(decimal grossIncomeThisMonth, decimal fundSupportYearToDate) { // declare and initialize variables decimal tax = CalcTax(grossIncomeThisMonth); // calculate the fund support decimal fund = CalcFundSupport(grossIncomeThisMonth, fundSupportYearToDate); // return the Income return (grossIncomeThisMonth - tax - fund); } } } 在计算税率时，还是使用了if/else.
所有回答(5)
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你指的这个高手，需要的是你要加入设计模式的思想
我还是不太明白，请再多指教一下。
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既然是问设计，为啥不把代码换成类图呢。看着一堆代码排版也不好，眼花，这样回答的人就少了
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７。尽量减少使用条件判断（if/else, switch/case)来计算税收和捐献。
你这里的确是不够面向对象。
GetTaxRate
GetFundRate
这2个实现重写
函数里不要有if，else语句
每种条件写成一个子类实现
将共同的计算步骤放到基类中实现。
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1 public class TaxEntity{ 2 public decimal Value{get;set;} 3 public double Rate{get;set;} 4 } 5 6 public class FundEntity 7 { 8 public decimal MaxValue { get; set; } 9 public decimal Value { get; set; } 10 } 11 12 public interface ICapture 13 { 14 decimal CaptureNet(Company company); 15 decimal CaptureTax(Company company); 16 decimal CaptureFund(Company company); 17 } 18 19 public class CapturerMonth : ICapture 20 { 21 #region ICapture 成员 22 23 public decimal CaptureNet(Company company) 24 { 25 throw new NotImplementedException(); 26 } 27 28 public decimal CaptureTax(Company company) 29 { 30 throw new NotImplementedException(); 31 } 32 33 public decimal CaptureFund(Company company) 34 { 35 throw new NotImplementedException(); 36 } 37 38 #endregion 39 } 40 public class CapturerYear : ICapture 41 { 42 43 #region ICapture 成员 44 45 public decimal CaptureNet(Company company) 46 { 47 throw new NotImplementedException(); 48 } 49 50 public decimal CaptureTax(Company company) 51 { 52 throw new NotImplementedException(); 53 } 54 55 public decimal CaptureFund(Company company) 56 { 57 throw new NotImplementedException(); 58 } 59 60 #endregion 61 } 62 public class Company { 63 64 FundEntity fund_; 65 public FundEntity GetFundEntity 66 { 67 get 68 { 69 return fund_; 70 } 71 } 72 TaxEntity tax_; 73 public TaxEntity GetTaxEntity 74 { 75 get 76 { 77 return tax_; 78 } 79 } 80 81 public decimal FundYear { get; set; } 82 public decimal GrosstMonth { get; set; } 83 public decimal GrossYear { get; set; } 84 public decimal NetMonth { get; set; } 85 public decimal NetYear { get; set; } 86 87 public Company(TaxEntity tax,FundEntity fund) 88 { 89 fund_ = fund; 90 tax_ = tax; 91 InitData(); 92 } 93 void InitData() 94 { 95 this.GrossYear = 90000000; 96 this.GrosstMonth = 1000000; 97 this.FundYear = 1200; 98 } 99 } 100 public class AccountContext 101 { 102 public void Start() 103 { 104 List<Company> list = new List<Company>(); 105 106 list.Add(new Company(new TaxEntity { Value = 2000, Rate = 0.2 }, new FundEntity { MaxValue = 2000, Value = 100 })); 107 list.Add(new Company(new TaxEntity { Value = 3000, Rate = 0.3 }, new FundEntity { MaxValue = 2000, Value = 100 })); 108 list.Add(new Company(new TaxEntity { Value = 4000, Rate = 0.4 }, new FundEntity { MaxValue = 2000, Value = 100 })); 109 list.Add(new Company(new TaxEntity { Value = 5000, Rate = 0.5 }, new FundEntity { MaxValue = 2000, Value = 100 })); 110 111 112 list.ForEach(company => Do(company, new CapturerMonth())); 113 list.ForEach(company => Do(company, new CapturerYear())); 114 } 115 void Do(Company company, ICapture capture) 116 { 117 capture.CaptureNet(company); 118 capture.CaptureTax(company); 119 capture.CaptureFund(company); 120 } 121 } 122 123 不知道行不行, 请你的高手赐教, capture 具体没实现的.
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希望这篇文章能给你有所指引：http://www.cnblogs.com/smartbooks/archive/2013/01/12/2857613.html
