Question

4. Define a class named TaxReturn that contains a tax ID number, last name, first name, annual income, number of dependents, and amount of tax owed for a taxpayer Include constant static fields that hold the tax rates for the situations shown in the following table Income (S) 0-10,000 0,001-30,000 0,001-60,000 60,001 and up 0 dependents 0.10 0.12 0.18 0.25 1 dependent 0.08 0.11 0.15 0.22 2 or more dependents 0.07 0.09 0.13 0.19 Include a static function that displays the tax table. Write a main) function that contains a single statement that displays the tax table Add two public functions to the TaxReturn class: setAllO, which can set the field values and display), which can display them. The setAllOfunction accepts arguments for the tax ID number, last and first names, annual income, and number of dependents The setAllOfunction should then call a private function that computes the tax owed. Create an array of 10 TaxReturnobiects. In a loop, prompt the user for ID number, first and last name, annual income, and number of dependents, then use these values to set a TaxReturn's fields. At the end of the loop, display all the values for all 10 TaxReturn objects, including the tax owed a) Draw a flowchart illustrating the program design to solve this problem. (4 Marks)

Answer 1

// C++ program to define a class to store attributes for a tax payer and calculate tax owed

#include <iostream>

#include <iomanip>

#include<limits>

using namespace std;

class TaxReturn{

private:

               // class fields

               int taxId;

               string lastname;

               string firstname;

               double annualIncome;

               int dependents;

               double taxOwed;

               const static float income_10k_0_dep = 0.10;

               const static float income_10k_1_dep = 0.08;

               const static float income_10k_2_dep = 0.07;

               const static float income_30k_0_dep = 0.12;

               const static float income_30k_1_dep = 0.11;

               const static float income_30k_2_dep = 0.09;

               const static float income_60k_0_dep = 0.18;

               const static float income_60k_1_dep = 0.15;

               const static float income_60k_2_dep = 0.13;

               const static float income_60k_up_0_dep = 0.25;

               const static float income_60k_up_1_dep = 0.22;

               const static float income_60k_up_2_dep = 0.19;

               // function to calculate the tax owed

               void setTaxOwed()

               {

                              if(annualIncome<=10000)

                              {

                                             if(dependents == 0)

                                                            taxOwed = income_10k_0_dep*annualIncome;

                                             else if(dependents == 1)

                                                            taxOwed = income_10k_1_dep*annualIncome;

                                             else

                                                            taxOwed = income_10k_2_dep*annualIncome;

                              }else if(annualIncome <=30000)

                              {

                                             if(dependents == 0)

                                                            taxOwed = income_30k_0_dep*annualIncome;

                                             else if(dependents == 1)

                                                            taxOwed = income_30k_1_dep*annualIncome;

                                             else

                                                            taxOwed = income_30k_2_dep*annualIncome;

                              }else if(annualIncome <= 60000)

                              {

                                             if(dependents == 0)

                                                            taxOwed = income_60k_0_dep*annualIncome;

                                             else if(dependents == 1)

                                                            taxOwed = income_60k_1_dep*annualIncome;

                                             else

                                                            taxOwed = income_60k_2_dep*annualIncome;

                              }else{

                                             if(dependents == 0)

                                                            taxOwed = income_60k_up_0_dep*annualIncome;

                                             else if(dependents == 1)

                                                            taxOwed = income_60k_up_1_dep*annualIncome;

                                             else

                                                            taxOwed = income_60k_up_2_dep*annualIncome;

                              }

               }

public:

               // function to set all fields of a class

               void setAll(int taxId,string lastname,string firstname,double annualIncome,int dependents)

               {

                              this->taxId = taxId;

                              this->lastname = lastname;

                              this->firstname = firstname;

                              this->annualIncome = annualIncome;

                              this->dependents = dependents;

                              setTaxOwed();

               }

               // function to display the fields

               void display()

               {

                              cout<<" Tax ID : "<<taxId<<endl;

                              cout<<" First Name : "<<firstname<<endl;

                              cout<<" Last Name : "<<lastname<<endl;

                              cout<<" Annual Income : $"<<annualIncome<<endl;

                              cout<<" Number of dependents "<<dependents<<endl;

                              cout<<" Tax owed : $"<<taxOwed<<endl;

               }

               // methdo to print the tax table

               static void printTaxTable()

               {

                              cout<<"\n"<<left<<setw(15)<<"Income($)"<<left<<setw(15)<<"0 dependents"<<left<<setw(15)<<"1 dependents"<<left<<"2 or more dependents"<<endl;

                              cout<<left<<setw(15)<<"0-10,000"<<left<<setw(15)<<income_10k_0_dep<<left<<setw(15)<<income_10k_1_dep<<left<<income_10k_2_dep<<endl;

                              cout<<left<<setw(15)<<"10,001-30,000"<<left<<setw(15)<<income_30k_0_dep<<left<<setw(15)<<income_30k_1_dep<<left<<income_30k_2_dep<<endl;

                              cout<<left<<setw(15)<<"30,001-60,000"<<left<<setw(15)<<income_60k_0_dep<<left<<setw(15)<<income_60k_1_dep<<left<<income_60k_2_dep<<endl;

                              cout<<left<<setw(15)<<"60,001and up"<<left<<setw(15)<<income_60k_up_0_dep<<left<<setw(15)<<income_60k_up_1_dep<<left<<income_60k_up_2_dep<<endl;

               }

};

int main() {

               TaxReturn::printTaxTable(); // print tax table

               TaxReturn taxReturn[10];

               int id,dependents;

               string fname,lname;

               double income;

               // loop to input the details of 10 tax payers and display the details

               cout<<"\n Enter details for 10 tax payers : ";

               for(int i=0;i<10;i++)

               {

                              cout<<"\n Tax ID : ";

                              cin>>id;

                              std::cin.ignore(std::numeric_limits<std::streamsize>::max(),'\n'); //cin leaves \n in the input so remove it

                              cout<<" Firstname :";

                              getline(cin,fname);

                              cout<<" Lastname :";

                              getline(cin,lname);

                              cout<<" Annual income :";

                              cin>>income;

                              cout<<" Number of dependents : ";

                              cin>>dependents;

                              taxReturn[i].setAll(id,lname,fname,income,dependents);

                              cout<<endl;

                              taxReturn[i].display();

               }

               return 0;

}

//end of program

Output:

Flowchart :