How to add/update/delete Department in university class? [closed] - c++

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#include <iostream>
using namespace std;
class Professor
{
string name;
long employeeID;
string designation;
public:
Professor()
{
name = "";
employeeID = 0;
designation = "";
}
Professor(string n, long ID, string d)
{
name = n;
employeeID = ID;
designation = d;
}
void setProfessorData(string name1, long ID1,string d1)
{
name = name1;
employeeID = ID1;
designation = d1;
}
string getName()
{
return name;
}
long getID()
{
return employeeID;
}
string getDesignation()
{
return designation;
}
};
class Department
{
private:
string name;
long deptID;
Professor profList[5];
int noOfprofessors;
public:
Department()
{
name = "";
deptID = 0;
for (int i = 0; i < 5; i++)
{
profList[i].setProfessorData ("",0,"");
}
noOfprofessors = 0;
}
Department(string name1, long id1, Professor array[5], int no_of_dpt)
{
name = name1;
deptID = id1;
for (int i = 0; i < 5; i++)
{
profList[i] = array[i];
}
noOfprofessors = no_of_dpt;
}
void setDepartmentData(string n, long i, Professor arr[5], int nd)
{
name = n;
deptID = i;
for (int i = 0; i < 5; i++)
{
profList[i] = arr[i];
}
noOfprofessors = nd;
}
string getName1()
{
return name;
}
long getDeptId()
{
return deptID;
}
int getnoOfProfessors()
{
return noOfprofessors;
}
};
class University
{
private:
string name;
Department dept[5];
int numberOfDepartments;
public:
University(string n, Department array[5], int no)
{
name = n;
for (int i = 0; i > 5; i++)
{
dept[i] = array[i];
}
numberOfDepartments = no;
}
void setUniversityData(string name1, Department arr[5], int n1)
{
name = name1;
for (int i = 0; i < 5; i++)
{
dept[i] = arr[i];
}
numberOfDepartments = n1;
}
bool addDepartment(Department D)
{
}
bool deleteDepartment(string name)
{
}
bool updateDepartment(int id, string name)
{
}
};
How to add, delete, and update Department in University class?
I have provided the skeleton code. I have implemented all constructors and destructors, but I don't know how to implement addDepartment(), deleteDepartment(), and updateDepartment()`. Kindly look into this and help me to complete this task.

Answer 1

First off, several of your for loops are incorrect, namely the ones in the following methods:
Department::Department(string, long, Professor[5], int), should be using no_of_dpt (or better, std::min(no_of_dpt, 5)) instead of 5 for the loop counter.
Department::setDepartmentData(), should be using nd (or better, std::min(nd, 5)) instead of 5 for the loop counter.
University::University(string, Department[5], int), should be using no (or better, std::min(no, 5)) instead of 5 for the loop counter. Also, the loop needs to use < instead of >.
University::setUniversityData(), should be using n1 (or better, std::min(n1, 5)) instead of 5 for the loop counter.
That being said, you already have basic logic for adding elements to arrays, so you can implement addDepartment() by applying that logic correctly, eg:
bool addDepartment(Department D)
{
if (numberOfDepartments < 5)
{
dept[numberOfDepartments] = D;
++numberOfDepartments;
}
}
And, you can easily implement deleteDepartment(), you just need to find the index of the desired Department and shift the remaining departments down 1 element in the array, eg:
bool deleteDepartment(string name)
{
for (int i = 0; i < numberOfDepartments; ++i)
{
if (dept[i].getName1() == name)
{
for(int j = i+1; j < numberOfDepartments; ++j)
{
dept[j-1] = dept[j];
}
--numberOfDepartments;
dept[numberOfDepartments].setDepartmentData("", 0, NULL, 0);
break;
}
}
}
Unfortunately, you cannot implement updateDepartment() with the current code you have shown. This is because University does not have access to update the Department::name field directly, and it does not have access to a Department's existing professor data in order to call Department::setDepartmentData() with just a new name.
So, you will have to fix this issue first, either by making University be a friend of Department, or by adding a Department::setName() setter, or by adding getters for the data in the Department::profList array.
However, once you have addressed that, you can then implement updateDepartment(), eg:
class Department
{
private:
string name;
...
friend class University;
public:
...
};
class University
{
private:
...
public:
...
bool updateDepartment(int id, string newName)
{
for (int i = 0; i < numberOfDepartments; ++i)
{
if (dept[i].getDeptId() == id)
{
dept[i].name = newName;
break;
}
}
}
};
Or:
class Department
{
private:
string name;
...
public:
...
void setName(string newName)
{
name = newName;
}
};
class University
{
private:
...
public:
...
bool updateDepartment(int id, string newName)
{
for (int i = 0; i < numberOfDepartments; ++i)
{
if (dept[i].getDeptId() == id)
{
dept[i].setName(newName);
break;
}
}
}
};
Or:
class Department
{
private:
...
Professor profList[5];
int noOfprofessors;
public:
...
Professor* getProfessors()
{
return profList;
}
int getnoOfProfessors()
{
return noOfprofessors;
}
};
class University
{
private:
...
public:
...
bool updateDepartment(int id, string newName)
{
for (int i = 0; i < numberOfDepartments; ++i)
{
if (dept[i].getDeptId() == id)
{
dept[i].setDepartmentData(newName, dept[i].getDeptId(), dept[i].getProfessors(), dept[i].getnoOfProfessors());
break;
}
}
}
};