有问题的方法调用在最后的这个 writeline 调用中
Console.WriteLine("Taxpayer # {0} SSN: {1}, Income is {2:c}, Tax is {3:c}", i + 1, taxArray[i].SSN, taxArray[i].grossIncome, taxRates.CalculateTax(taxArray[i].grossIncome));
这是该方法所在的费率类
public class Rates
{
// Create a class named rates that has the following data members:
int incLimit;
double lowTaxRate;
double highTaxRate;
// use read-only accessor
public int IncomeLimit
{ get { return incLimit; } }
public double LowTaxRate
{ get { return lowTaxRate; } }
public double HighTaxRate
{ get { return highTaxRate; } }
//A class constructor that assigns default values
public void assignRates()
{
incLimit = 30000;
lowTaxRate = .15;
highTaxRate = .28;
}
//A class constructor that takes three parameters to assign input values for limit, low rate and high rate.
public void assignRates(int lim, double low, double high)
{
incLimit = lim;
lowTaxRate = low;
highTaxRate = high;
}
// A CalculateTax method that takes an income parameter and computes the tax as follows:
public int CalculateTax(int income)
{
int taxOwed;
// If income is less than the limit then return the tax as income times low rate.
if (income < incLimit)
taxOwed = Convert.ToInt32(income * lowTaxRate);
// If income is greater than or equal to the limit then return the tax as income times high rate.
else
taxOwed = Convert.ToInt32(income * highTaxRate);
return taxOwed;
}
现在，如果我在初始化以下变量时将一个值粘贴到它们中，我可以获得一个返回值，但如果我将它们保留为默认值，我总是从 writeline 中得到 0。
int incLimit;
double lowTaxRate;
double highTaxRate;
以防万一您需要查看其他内容，剩下的就在这里。
我也有关于排序的问题，我认为它不能正常工作，因为我需要它按 taxOwed 金额排序，但目前是 0 和我的问题。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Assignment5_2
{
public class Rates
{
// Create a class named rates that has the following data members:
int incLimit;
double lowTaxRate;
double highTaxRate;
// use read-only accessor
public int IncomeLimit
{ get { return incLimit; } }
public double LowTaxRate
{ get { return lowTaxRate; } }
public double HighTaxRate
{ get { return highTaxRate; } }
//A class constructor that assigns default values
public void assignRates()
{
incLimit = 30000;
lowTaxRate = .15;
highTaxRate = .28;
}
//A class constructor that takes three parameters to assign input values for limit, low rate and high rate.
public void assignRates(int lim, double low, double high)
{
incLimit = lim;
lowTaxRate = low;
highTaxRate = high;
}
// A CalculateTax method that takes an income parameter and computes the tax as follows:
public int CalculateTax(int income)
{
int taxOwed;
// If income is less than the limit then return the tax as income times low rate.
if (income < incLimit)
taxOwed = Convert.ToInt32(income * lowTaxRate);
// If income is greater than or equal to the limit then return the tax as income times high rate.
else
taxOwed = Convert.ToInt32(income * highTaxRate);
return taxOwed;
}
} //end class Rates
// Create a class named Taxpayer that has the following data members:
public class Taxpayer : IComparable
{
//Use get and set accessors.
string SSN
{ set; get; }
int grossIncome
{ set; get; }
int taxOwed
{ set; get; }
int IComparable.CompareTo(Object o)
{
int returnVal;
Taxpayer temp = (Taxpayer)o;
if (this.taxOwed > temp.taxOwed)
returnVal = 1;
else if (this.taxOwed < temp.taxOwed)
returnVal = -1;
else returnVal = 0;
return returnVal;
} // End IComparable.CompareTo
public static void GetRates()
{
// Local method data members for income limit, low rate and high rate.
int incLimit;
double lowRate;
double highRate;
string userInput;
Rates rates = new Rates();
// Prompt the user to enter a selection for either default settings or user input of settings.
Console.Write("Would you like the default values (D) or would you like to enter the values (E)?: ");
/* If the user selects default the default values you will instantiate a rates object using the default constructor
* and set the Taxpayer class data member for tax equal to the value returned from calling the rates object CalculateTax method.*/
userInput = (Console.ReadLine());
if (userInput == "D" || userInput == "d")
{
rates.assignRates();
} // end if
/* If the user selects to enter the rates data then prompt the user to enter values for income limit, low rate and high rate,
* instantiate a rates object using the three-argument constructor passing those three entries as the constructor arguments and
* set the Taxpayer class data member for tax equal to the valuereturned from calling the rates object CalculateTax method. */
else if (userInput == "E" || userInput == "e")
{
Console.Write("Please enter the income limit: ");
incLimit = Convert.ToInt32(Console.ReadLine());
Console.Write("Please enter the low rate: ");
lowRate = Convert.ToDouble(Console.ReadLine());
Console.Write("Please enter the high rate: ");
highRate = Convert.ToDouble(Console.ReadLine());
//Rates rates = new Rates();
rates.assignRates(incLimit, lowRate, highRate);
}
else Console.WriteLine("You made an incorrect choice");
}
static void Main(string[] args)
{
Taxpayer[] taxArray = new Taxpayer[5];
Rates taxRates = new Rates();
// Implement a for-loop that will prompt the user to enter the Social Security Number and gross income.
for (int x = 0; x < taxArray.Length; ++x)
{
taxArray[x] = new Taxpayer();
Console.Write("Please enter the Social Security Number for taxpayer {0}: ", x + 1);
taxArray[x].SSN = Console.ReadLine();
Console.Write("Please enter the gross income for taxpayer {0}: ", x + 1);
taxArray[x].grossIncome = Convert.ToInt32(Console.ReadLine());
taxArray[x].taxOwed = taxRates.CalculateTax(taxArray[x].grossIncome);
}
Taxpayer.GetRates();
// Implement a for-loop that will display each object as formatted taxpayer SSN, income and calculated tax.
for (int i = 0; i < taxArray.Length; ++i)
{
Console.WriteLine("Taxpayer # {0} SSN: {1}, Income is {2:c}, Tax is {3:c}", i + 1, taxArray[i].SSN, taxArray[i].grossIncome, taxArray[i]);//taxRates.CalculateTax(taxArray[i].grossIncome));
} // end for
// Implement a for-loop that will sort the five objects in order by the amount of tax owed
Array.Sort(taxArray);
Console.WriteLine("Sorted by tax owed");
for (int i = 0; i < taxArray.Length; ++i)
{
Console.WriteLine("Taxpayer # {0} SSN: {1}, Income is {2:c}, Tax is {3:c}", i + 1, taxArray[i].SSN, taxArray[i].grossIncome, taxRates.CalculateTax(taxArray[i].grossIncome));
}
} //end main
} // end Taxpayer class
} //end