C++ Array Object Checking Values - c++

Question

I am supposed to write a program with two classes, Employee and Department. When the main() function runs, it asks the user to choose one of the six numbered options that are displayed and creates arrays for Employee and Department objects. I'm disregarding every other option except option 1, the Create Department Option, so the focus of this issue will be the Department class and the Department department[3] array.
There is a while loop in the main() function that continuously runs until the user decides to exit. If the user enters option 1, a Department array object is created, and then the user also enters the departmentID, departmentName, and departmentHeadName for that object. The while loop notifies the user if the array has three Employee objects. However, I am having difficulties because each departmentID needs to be unique. For example, I cannot enter 1 for the first array object's departmentID, and then enter 1 again for the second array object's departmentID. How do I check if the user's departmentID input already exists in a previous object?
#include <iostream>
#include <string>
using namespace std;
// Employee Class
class Employee
{
private:
string employeeID;
string employeeName;
string employeeDepartmentID;
double employeeSalary;
int employeeAge;
public:
void createEmployee()
{
cout << "Please Enter Employee Details:" << endl;
cout << "Employee ID : ";
cin >> employeeID;
cout << "Employee Name :";
cin >> employeeName;
cout << "Salary: $";
cin >> employeeSalary;
cout << "Age : ";
cin >> employeeAge;
cout << "Department ID : ";
cin >> employeeDepartmentID;
}
};
// Department Class
class Department
{
private:
string departmentID;
string departmentName;
string departmentHeadName;
public:
void createDepartment()
{
cout << "Please Enter Department Details: \n";
cout << "Department ID : ";
cin >> departmentID;
cout << "Department Name : ";
cin >> departmentName;
cout << "Head of Department : ";
cin >> departmentHeadName;
}
};
// Function prototype
void displayMenu();
// Client main function
int main()
{
Employee employee[5];
Department department[3];
int choice;
int departmentCount = 0;
int employeeCount = 0;
while (true)
{
displayMenu();
cin >> choice;
if (choice == 1 && departmentCount < 3)
{
department[departmentCount].createDepartment();
departmentCount = departmentCount + 1;
}
else if (choice == 1 && departmentCount >= 3)
{
cout << "\nThe array is full, you can not add any more Departments." << endl;
}
else if (choice == 2 && employeeCount < 5)
{
employee[employeeCount].createEmployee();
employeeCount = employeeCount + 1;
}
else if (choice == 2 && employeeCount >= 5)
{
cout << "The array is full, you can not add any more Employees." << endl;
}
else if (choice == 6)
{
cout << "Thank you, goodbye." << endl;
break;
}
}
return 0;
}
// Display menu function
void displayMenu()
{
cout << "1. Create Department" << endl;
cout << "2. Create Employee" << endl;
cout << "3. Write Out Data File" << endl;
cout << "4. Read In Data File" << endl;
cout << "5. Display Salary Report" << endl;
cout << "6. -- Quit -- " << endl;
cout << "Please make a selection : ";
}

Answer 1

try this one
#include <iostream>
#include <string>
using namespace std;
// Employee Class
class Employee
{
private:
string employeeID;
string employeeName;
string employeeDepartmentID;
double employeeSalary;
int employeeAge;
public:
void createEmployee()
{
cout << "Please Enter Employee Details:" << endl;
cout << "Employee ID : ";
cin >> employeeID;
cout << "Employee Name :";
cin >> employeeName;
cout << "Salary: $";
cin >> employeeSalary;
cout << "Age : ";
cin >> employeeAge;
cout << "Department ID : ";
cin >> employeeDepartmentID;
}
};
// Department Class
class Department
{
private:
string departmentID;
string departmentName;
string departmentHeadName;
public:
void createDepartment()
{
cout << "Please Enter Department Details: \n";
cout << "Department ID : ";
cin >> departmentID;
cout << "Department Name : ";
cin >> departmentName;
cout << "Head of Department : ";
cin >> departmentHeadName;
}
public:
string getDepartmentID(){
return departmentID;
}
};
// Function prototype
void displayMenu();
// Client main function
int main()
{
Employee employee[5];
Department department[3];
int choice;
int departmentCount = 0;
int employeeCount = 0;
while (true)
{
displayMenu();
cin >> choice;
if (choice == 1 && departmentCount < 3)
{
department[departmentCount].createDepartment();
for(int i=0;i<departmentCount;i++)
{
if(department[i].getDepartmentID()==department[departmentCount].getDepartmentID())
{
cout<<"already exists......................... \n";
}
}
departmentCount = departmentCount + 1;
}
else if (choice == 1 && departmentCount >= 3)
{
cout << "\nThe array is full, you can not add any more Departments." << endl;
}
else if (choice == 2 && employeeCount < 5)
{
employee[employeeCount].createEmployee();
employeeCount = employeeCount + 1;
}
else if (choice == 2 && employeeCount >= 5)
{
cout << "The array is full, you can not add any more Employees." << endl;
}
else if (choice == 6)
{
cout << "Thank you, goodbye." << endl;
break;
}
}
return 0;
}
// Display menu function
void displayMenu()
{
cout << "1. Create Department" << endl;
cout << "2. Create Employee" << endl;
cout << "3. Write Out Data File" << endl;
cout << "4. Read In Data File" << endl;
cout << "5. Display Salary Report" << endl;
cout << "6. -- Quit -- " << endl;
cout << "Please make a selection : ";
}

Answer 2

I used getDepartmentID function in Department Class to get department id from each department object
public:
string getDepartmentID(){
return departmentID;
}
there should be return type is string.because you have created departmentID as a string.
and I used For Loop in main function to compare relevant department id already exists or not
for(int i=0;i<departmentCount;i++)
{
if(department[i].getDepartmentID()==department[departmentCount].getDepartmentID())
{
cout<<"already exists......................... \n";
}
}