Question

Objective:

The purpose of this lab project is to expose you to structures and classes.

Problem Specification:

You are to write a program that will define a structure consisting of the following data members, “fields”:

• name
• hours worked
• hourly rate

1. Use a structure to implement the following:

You will use a function to read the name, hours and rate, passing them individually by reference to the main function.

Call a function to print, this function accepts the entire structure by value.

This function will call a function that will return the grosspay, a local variable in print, by multiplying the hours times the rate.

The function then prints each data member on a separate line followed by the grosspay.

2. Use a class to implement the same problem solution:

Data members are the specified above, no other data members.

You must include a null constructor, and destructor.

You must not use inline function, must declare functions in the class declaration section, and then implement them.

A member function prints the information (all data members, each on a separate line) calls the function that calculates the grosspay, not a data member, and prints the grosspay.

The function that calculates the grosspay must be private.

Input to the program consists of:

• name
• hours worked
• hourly rate

Your output should be a report like follows:

Employee Name:        Jim Donavan

Hours worked:                                                 40.00

Hourly Rate:                                              $     9.75

Wages:                                                          $ 390.00

Grading criteria:

          Structure implementation

10 points         Good programming practices:

Descriptive names are used

Proper spacing, comments, use of variables.

Indentation and appearance of program.

5 points         structure defined correctly with the specified data members.

5 points         Hierarchical chart is handed-in and is correct.

10 points         the function that reads the data passes the values entered back into the structure.

5 points         the function that calculates, returns the gross as its value.

10 points         the function that prints accepts the entire structures value, prints all the members on a separate line each and the grosspay.

5 points         test results for the structure implementation are handed in.

Class Implementation

5   points       class is defined correctly (data members, member functions).

5   points       UML class diagram is handed-in and is correct.

5 points         constructor and destructor functions are defined and are null.

5 points         main instantiate objects and calls public functions to do tasks.

10 points         a member function reads the input data.

10 points         the print member function done correctly and does what it supposed to.

5 points         the function to find the gross is private correct and is called from print.

5 points         test results for the class implementation are handed in.

Answer 1

Structure implementation

#include <iostream>
#include <string>

using namespace std;

struct Employee
{
int hours_worked;
string name;
float hourly_rate;
};

//accepts reference variable so that read inputs are reflected back
void read (struct Employee &emp)
{
  
cout<<endl<<"Enter name :";
cin>>emp.name;
cout<<endl<<"Hours worked :";
cin>>emp.hours_worked;
cout<<endl<<"Hourly rate : ";
cin>>emp.hourly_rate;
  
}

double pay(int hr, double rate){
return hr*rate;
}

//pass by value
void print(struct Employee emp){
double grosspay;
grosspay = pay(emp.hours_worked,emp.hourly_rate);
cout<<endl<<"Employee Name : "<<emp.name;
cout<<endl<<"Hours Worked : "<<emp.hours_worked;
cout<<endl<<"Hourly Rate : $"<<emp.hourly_rate;
cout<<endl<<"Gross Pay : $"<<grosspay;
}

int main()
{
   struct Employee emp;
read(emp);
print(emp);
   return 0;
}

class implementation

#include <iostream>

#include <string>

using namespace std;

class Employee

{

private:

int hours_worked;

string name;

float hourly_rate;

//private pay

void pay();

public:

//constructor

Employee(){}

//function declare

void read();

void print();

//destuctor

~Employee(){}

};

//definition

void Employee:: read ()

{

cout<<endl<<"Enter name :";

cin>>name;

cout<<endl<<"Hours worked :";

cin>>hours_worked;

cout<<endl<<"Hourly rate : ";

cin>>hourly_rate;

}

void Employee::pay(){

double grosspay = hours_worked * hourly_rate;

cout<<endl<<"Gross Pay : $"<<grosspay;

}

//pass by value

void Employee::print(){

cout<<endl<<"Employee Name : "<<name;

cout<<endl<<"Hours Worked : "<<hours_worked;

cout<<endl<<"Hourly Rate : $"<<hourly_rate;

pay();

}

int main()

{

  Employee emp;

emp.read();

emp.print();

  return 0;

}

output