Question

C++

Change the program to take user input for first name and last name for five employees. Add a loop to read the first name and last name.

// EmployeeStatic.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <string>
#include <iostream>
#include <string>

using namespace std;

class Employee {
public:
   Employee(const std::string&, const std::string&); // constructor
   ~Employee(); // destructor
   std::string getFirstName() const; // return first name
   std::string getLastName() const; // return last name

                                   // static member function
   static unsigned int getCount(); // return # of objects instantiated
private:
   std::string firstName;
   std::string lastName;

   // static data
   static unsigned int count; // number of objects instantiated
};

// Employee class member-function definitions.

// define and initialize static data member at global namespace scope
unsigned int Employee::count{ 0 }; // cannot include keyword static

                               // define static member function that returns number of   
                               // Employee objects instantiated (declared static in Employee.h)
unsigned int Employee::getCount() { return count; }

// constructor initializes non-static data members and
// increments static data member count
Employee::Employee(const string& first, const string& last)
   : firstName(first), lastName(last) {
   ++count; // increment static count of employees
   cout << "Employee constructor for " << firstName
       << ' ' << lastName << " called." << endl;
}

// destructor decrements the count
Employee::~Employee() {
   cout << "~Employee() called for " << firstName
       << ' ' << lastName << endl;
   --count; // decrement static count of employees
}

// return first name of employee
string Employee::getFirstName() const { return firstName; }

// return last name of employee
string Employee::getLastName() const { return lastName; }

// static data member tracking the number of objects of a class.

int main() {
   // no objects exist; use class name and binary scope resolution
   // operator to access static member function getCount
   cout << "Number of employees before instantiation of any objects is "
       << Employee::getCount() << endl; // use class name

                                       // the following scope creates and destroys
                                       // Employee objects before main terminates
   {
       Employee e1{ "Susan", "Baker" };
       Employee e2{ "Robert", "Jones" };

       // two objects exist; call static member function getCount again
       // using the class name and the scope resolution operator
       cout << "Number of employees after objects are instantiated is "
           << Employee::getCount();

       cout << "\n\nEmployee 1: "
           << e1.getFirstName() << " " << e1.getLastName()
           << "\nEmployee 2: "
           << e2.getFirstName() << " " << e2.getLastName() << "\n\n";
   }

   // no objects exist, so call static member function getCount again
   // using the class name and the scope resolution operator
   cout << "\nNumber of employees after objects are deleted is "
       << Employee::getCount() << endl;

   system("pause");
}

Answer 1

Employee.cpp

#include<iostream>
#include<string.h>
using namespace std;
// Employee class
class Employee
{
   // data members
   string firstName;
   string lastName;
   public:
   // default constructor
   Employee()
   {
       firstName=lastName="";
   }
   // parameterized constructor
   Employee(string first,string last)
   {
       firstName=first;
       lastName=last;
   }
   // function to set first name of employee
   void setFirstName(string first)
   {
       firstName=first;
   }
   // function to get first name of employee
   string getFirstName()
   {
       return firstName;
   }
   // function to set last name of employee
   void setLastName(string last)
   {
       lastName=last;
   }
   // function to get last name of employee
   string getLastName()
   {
       return lastName;
   }
};

int main()
{
   // create Emplyee object array of size 5
   Employee employees[5];
   // variable declaration
   string firstName,lastName;
   for(int i=0;i<5;i++)
   {
       cout<<"Enter first name for employee "<<(i+1)<<": ";
       cin>>firstName; // read first name
       cout<<"Enter last name for employee "<<(i+1)<<": ";
       cin>>lastName; // read last name
       // set first name to employee
       employees[i].setFirstName(firstName);
       // set last name to employee
       employees[i].setLastName(lastName);
   }
   cout<<endl<<endl<<"Names of 5 employees: "<<endl;
   for(int i=0;i<5;i++)
   {
       // display employee full name
       cout<<employees[i].getFirstName()<<" "<<employees[i].getLastName()<<endl;
   }
   return 0;
}

Output