I just need part G: Sort List by Last Name, and H: Sort List By GPA. Thanks in a
ID: 3742327 • Letter: I
Question
I just need part G: Sort List by Last Name, and H: Sort List By GPA. Thanks in advance :-)
Program Summary
Write a C++ object-oriented program to manage a file system for students.
First Name – string
Last Name – string
Student ID – unsigned integer
Email – string
GPA - float
The program will manipulate the student list based on students from the file students.dat
Class requirements
Create a student class or struct based on the student structure
Create a students class which contains three private members – an array of students, the size of the array, and a function to print the contents of a process. The processes class will also provide the following functionality.
Load data from a data file into a student list
Retrieve and print a student from the student list
Insert a student into the student list
Delete a student from the student list
Print the contents of a student record
Print the contents for a list of students
Sort the student list by last Name
Sort the student list by GPA
Processing requirements
Load the students file students.dat
Create a menu to carry out the given operations
Implement input validation to avoid erroneous program errors
Structure of the file
students.dat – First Name, Last Name, Student ID, Email, GPA
Smith Jefferey 891789 j.smith@spartans.nsu.edu 3.75
Lee Jackson 3678902 j.lee@spartans.nsu.edu 3.66
Gonzales Mariana 168790 m.gonzales18@spartans.nsu.edu 4.0
Jones Mike 8973125 m.jones143@spartans.nsu.edu 3.1
Williams Anita 2985465 a.williams@spartans.nsu.edu 3.64
Ronsinson Taylor 3278976 t.robinson@spartans.nsu.edu 3.55
Clark Allen 1094567 a.clark@spartans.nsu.edu 3.48
Turner Tavon 318796 t.turner@spartans.nsu.edu 3.2
Jenkins Nelson 289563 n.jenkins@spartans.nsu.edu 3.0
*********************************MY CODE:
#include <fstream>
#include <string>
#include <iomanip>
using namespace std;
struct studentInfo
{
string firstName;
string lastName;
unsigned int studentID;
string email;
float gpa;
};
class studentsProc
{
public:
void studentList();
void loadList();
void retrieveStudent();
void insertStudent();
void deleteStudent();
void printStudent();
void displayStudent();
void sortLastName();
void sortGpa();
studentsProc();
private:
studentInfo students[40];
int size;
void printList() const;
};
studentsProc::studentsProc()
{
size = 0;
}
void studentsProc::studentList()
{
cout << "0. Smith, Jefferey" << endl;
cout << "1. Lee, Jackson" << endl;
cout << "2. Gonzales, Mariana" << endl;
cout << "3. Jones, Mike" << endl;
cout << "4. Wiliams, Anita" << endl;
cout << "5. Ronsinson, Taylor" << endl;
cout << "6. Clark, Allen" << endl;
cout << "7. Turner, Tavon" << endl;
cout << "8. Jenkins, Nelson" << endl << endl;
}
void studentsProc::loadList()
{
ifstream infile;
infile.open("students.dat");
size = 0;
while (!infile.eof())
{
infile >> students[size].lastName;
infile >> students[size].firstName;
infile >> students[size].studentID;
infile >> students[size].email;
infile >> students[size].gpa;
size++;
}
infile.close();
}
void studentsProc::retrieveStudent()
{
int number;
studentsProc::studentList();
cout << "Please Enter the Position of the Student you Wish to Retrieve " << endl;
cin >> number;
{
cout << "Student Name: " << students[number].firstName << " " << students[number].lastName << endl;
}
}
void studentsProc::insertStudent()
{
int position;
cout << "Enter the Position of the New Student you Would Like to Add: " << endl;
cin >> position;
cout << endl;
cout << "Enter the Following Information About The Student: " << endl;
cout << "First Name: "; cin >> students[position].firstName;
cout << "Last Name: "; cin >> students[position].lastName;
cout << "Student ID: "; cin >> students[position].studentID;
cout << "E-Mail: "; cin >> students[position].email;
cout << "GPA: "; cin >> students[position].gpa;
cout << "The New List Is: " << endl;
studentsProc::displayStudent();
}
void studentsProc::deleteStudent()
{
}
void studentsProc::printStudent()
{
int number;
studentsProc::studentList();
cout << "Please Enter the Number of the Student's Record You Wish to View " << endl;
cin >> number;
{
cout << "First Name: " << students[number].firstName << " || "
<< "Last Name: " << students[number].lastName << " || "
<< "Student ID: " << students[number].studentID << " || "
<< "Student E-mail: " << students[number].email << " || "
<< "Student GPA: " << students[number].gpa << endl;
}
}
void studentsProc::displayStudent()
{
studentsProc::printList();
}
void studentsProc::printList() const
{
cout << "Student List" << endl;
for (int i = 0; i < size; i++)
{
cout << "Last Name: " << students[i].lastName << " || "
<< "First Name: " << students[i].firstName << " || "
<< "Student ID: " << students[i].studentID << " || "
<< "Student E-mail: " << students[i].email << " || "
<< "Student GPA: " << students[i].gpa << endl;
}
}
void studentsProc::sortLastName()
{
}
void studentsProc::sortGpa()
{
}
int main()
{
studentsProc student1;
student1.loadList();
int choice;
do
{
cout << "Please Choose an Option from this Menu" << endl << endl;
cout << "1. Retrieve and Print a Student from the Student List " << endl;
cout << "2. Insert a Student into the Student List " << endl;
cout << "3. Delete a Student from the Student List " << endl;
cout << "4. Print the Contents of a Student Record " << endl;
cout << "5. Print the Contents for a List of Students " << endl;
cout << "6. View the Students List Sorted by Last Name " << endl;
cout << "7. View the Students List Sorted by GPA " << endl;
cin >> choice;
cout << endl;
switch (choice)
{
case 1: student1.retrieveStudent();
break;
case 2: student1.insertStudent();
break;
case 3: student1.deleteStudent();
break;
case 4: student1.printStudent();
break;
case 5: student1.displayStudent();
break;
case 6: student1.sortLastName();
break;
case 7: student1.sortGpa();
break;
default: cout << "Please enter a value 1-7" << endl;
}//end switch
cout << endl << endl;
} while (choice != 7);
return 0;
}
Explanation / Answer
UPDATED PROGRAM ( I Just Implement both sorting methods)
#include<iostream>
#include <fstream>
#include <string>
#include <iomanip>
using namespace std;
struct studentInfo
{
string firstName;
string lastName;
unsigned int studentID;
string email;
float gpa;
};
class studentsProc
{
public:
void studentList();
void loadList();
void retrieveStudent();
void insertStudent();
void deleteStudent();
void printStudent();
void displayStudent();
void sortLastName();
void sortGpa();
studentsProc();
private:
studentInfo students[40];
int size;
void printList() const;
};
studentsProc::studentsProc()
{
size = 0;
}
void studentsProc::studentList()
{
cout << "0. Smith, Jefferey" << endl;
cout << "1. Lee, Jackson" << endl;
cout << "2. Gonzales, Mariana" << endl;
cout << "3. Jones, Mike" << endl;
cout << "4. Wiliams, Anita" << endl;
cout << "5. Ronsinson, Taylor" << endl;
cout << "6. Clark, Allen" << endl;
cout << "7. Turner, Tavon" << endl;
cout << "8. Jenkins, Nelson" << endl << endl;
}
void studentsProc::loadList()
{
ifstream infile;
infile.open("f:\students.dat");
size = 0;
while (!infile.eof())
{
infile >> students[size].lastName;
infile >> students[size].firstName;
infile >> students[size].studentID;
infile >> students[size].email;
infile >> students[size].gpa;
size++;
}
infile.close();
}
void studentsProc::retrieveStudent()
{
int number;
studentsProc::studentList();
cout << "Please Enter the Position of the Student you Wish to Retrieve " << endl;
cin >> number;
{
cout << "Student Name: " << students[number].firstName << " " << students[number].lastName << endl;
}
}
void studentsProc::insertStudent()
{
int position;
cout << "Enter the Position of the New Student you Would Like to Add: " << endl;
cin >> position;
cout << endl;
cout << "Enter the Following Information About The Student: " << endl;
cout << "First Name: "; cin >> students[position].firstName;
cout << "Last Name: "; cin >> students[position].lastName;
cout << "Student ID: "; cin >> students[position].studentID;
cout << "E-Mail: "; cin >> students[position].email;
cout << "GPA: "; cin >> students[position].gpa;
cout << "The New List Is: " << endl;
studentsProc::displayStudent();
}
void studentsProc::deleteStudent()
{
}
void studentsProc::printStudent()
{
int number;
studentsProc::studentList();
cout << "Please Enter the Number of the Student's Record You Wish to View " << endl;
cin >> number;
{
cout << "First Name: " << students[number].firstName << " || "
<< "Last Name: " << students[number].lastName << " || "
<< "Student ID: " << students[number].studentID << " || "
<< "Student E-mail: " << students[number].email << " || "
<< "Student GPA: " << students[number].gpa << endl;
}
}
void studentsProc::displayStudent()
{
studentsProc::printList();
}
void studentsProc::printList() const
{
cout << "Student List" << endl;
for (int i = 0; i < size; i++)
{
cout << "Last Name: " << students[i].lastName << " || "
<< "First Name: " << students[i].firstName << " || "
<< "Student ID: " << students[i].studentID << " || "
<< "Student E-mail: " << students[i].email << " || "
<< "Student GPA: " << students[i].gpa << endl;
}
}
// implement swap() function for interchange all records in the structure
void swap(studentInfo s1,studentInfo s2)
{
// declare temporary variables
string temp_fname,temp_lname,temp_email;
unsigned int temp_studentID;
float temp_gpa;
// assign each structure elements into temporary variables
temp_fname=s2.firstName;
temp_lname=s2.lastName;
temp_email=s2.email;
temp_studentID=s2.studentID;
temp_gpa=s2.gpa;
//swapping of each elements
s2.firstName=s1.firstName;
s2.lastName =s1.lastName ;
s2.email =s1.email;
s2.studentID =s1.studentID;
s2.gpa =s1.gpa;
s1.firstName=temp_fname;
s1.lastName =temp_lname;
s1.email =temp_email;
s1.studentID =temp_studentID;
s1.gpa =temp_gpa;
}
// implement sorting of student records interms of last name
void studentsProc::sortLastName()
{
for(int i=0;i<size-1;i++)
{
for(int j=0;j<size-i-1;j++)
{
if(students[j].lastName>students[j+1].lastName)
{
swap(students[j].lastName,students[j+1].lastName);
swap(students[j].firstName,students[j+1].firstName);
swap(students[j].email,students[j+1].email);
swap(students[j].studentID,students[j+1].studentID);
swap(students[j].gpa,students[j+1].gpa);
}
}
}
printList();
}
// implement sorting of student records interms of GPA
void studentsProc::sortGpa()
{
for(int i=0;i<size-1;i++)
{
for(int j=0;j<size-i-1;j++)
{
if(students[j].gpa>students[j+1].gpa)
{
swap(students[j].lastName,students[j+1].lastName);
swap(students[j].firstName,students[j+1].firstName);
swap(students[j].email,students[j+1].email);
swap(students[j].studentID,students[j+1].studentID);
swap(students[j].gpa,students[j+1].gpa);
}
}
}
printList();
}
int main()
{
studentsProc student1;
student1.loadList();
int choice;
do
{
cout << "Please Choose an Option from this Menu" << endl << endl;
cout << "1. Retrieve and Print a Student from the Student List " << endl;
cout << "2. Insert a Student into the Student List " << endl;
cout << "3. Delete a Student from the Student List " << endl;
cout << "4. Print the Contents of a Student Record " << endl;
cout << "5. Print the Contents for a List of Students " << endl;
cout << "6. View the Students List Sorted by Last Name " << endl;
cout << "7. View the Students List Sorted by GPA " << endl;
cin >> choice;
cout << endl;
switch (choice)
{
case 1: student1.retrieveStudent();
break;
case 2: student1.insertStudent();
break;
case 3: student1.deleteStudent();
break;
case 4: student1.printStudent();
break;
case 5: student1.displayStudent();
break;
case 6: student1.sortLastName();
break;
case 7: student1.sortGpa();
break;
default: cout << "Please enter a value 1-7" << endl;
}//end switch
cout << endl << endl;
} while (choice != 7);
return 0;
}
OUTPUT
Please Choose an Option from this Menu
1. Retrieve and Print a Student from the Student List
2. Insert a Student into the Student List
3. Delete a Student from the Student List
4. Print the Contents of a Student Record
5. Print the Contents for a List of Students
6. View the Students List Sorted by Last Name
7. View the Students List Sorted by GPA
1
0. Smith, Jefferey
1. Lee, Jackson
2. Gonzales, Mariana
3. Jones, Mike
4. Wiliams, Anita
5. Ronsinson, Taylor
6. Clark, Allen
7. Turner, Tavon
8. Jenkins, Nelson
Please Enter the Position of the Student you Wish to Retrieve
2
Student Name: Mariana Gonzales
Please Choose an Option from this Menu
1. Retrieve and Print a Student from the Student List
2. Insert a Student into the Student List
3. Delete a Student from the Student List
4. Print the Contents of a Student Record
5. Print the Contents for a List of Students
6. View the Students List Sorted by Last Name
7. View the Students List Sorted by GPA
6
Student List
Last Name: Clark || First Name: Allen || Student ID: 1094567 || Student E-mail: a.clark@spartans.nsu.edu || Student GPA: 3.48
Last Name: Gonzales || First Name: Mariana || Student ID: 168790 || Student E-mail: m.gonzales18@spartans.nsu.edu || Student GPA: 4
Last Name: Jenkins || First Name: Nelson || Student ID: 289563 || Student E-mail: n.jenkins@spartans.nsu.edu || Student GPA: 3
Last Name: Jones || First Name: Mike || Student ID: 8973125 || Student E-mail: m.jones143@spartans.nsu.edu || Student GPA: 3.1
Last Name: Lee || First Name: Jackson || Student ID: 3678902 || Student E-mail: j.lee@spartans.nsu.edu || Student GPA: 3.66
Last Name: Ronsinson || First Name: Taylor || Student ID: 3278976 || Student E-mail: t.robinson@spartans.nsu.edu || Student GPA: 3.55
Last Name: Smith || First Name: Jefferey || Student ID: 891789 || Student E-mail: j.smith@spartans.nsu.edu || Student GPA: 3.75
Last Name: Turner || First Name: Tavon || Student ID: 318796 || Student E-mail: t.turner@spartans.nsu.edu || Student GPA: 3.2
Last Name: Williams || First Name: Anita || Student ID: 2985465 || Student E-mail: a.williams@spartans.nsu.edu || Student GPA: 3.64
Please Choose an Option from this Menu
1. Retrieve and Print a Student from the Student List
2. Insert a Student into the Student List
3. Delete a Student from the Student List
4. Print the Contents of a Student Record
5. Print the Contents for a List of Students
6. View the Students List Sorted by Last Name
7. View the Students List Sorted by GPA
7
Student List
Last Name: Jenkins || First Name: Nelson || Student ID: 289563 || Student E-mail: n.jenkins@spartans.nsu.edu || Student GPA: 3
Last Name: Jones || First Name: Mike || Student ID: 8973125 || Student E-mail: m.jones143@spartans.nsu.edu || Student GPA: 3.1
Last Name: Turner || First Name: Tavon || Student ID: 318796 || Student E-mail: t.turner@spartans.nsu.edu || Student GPA: 3.2
Last Name: Clark || First Name: Allen || Student ID: 1094567 || Student E-mail: a.clark@spartans.nsu.edu || Student GPA: 3.48
Last Name: Ronsinson || First Name: Taylor || Student ID: 3278976 || Student E-mail: t.robinson@spartans.nsu.edu || Student GPA: 3.55
Last Name: Williams || First Name: Anita || Student ID: 2985465 || Student E-mail: a.williams@spartans.nsu.edu || Student GPA: 3.64
Last Name: Lee || First Name: Jackson || Student ID: 3678902 || Student E-mail: j.lee@spartans.nsu.edu || Student GPA: 3.66
Last Name: Smith || First Name: Jefferey || Student ID: 891789 || Student E-mail: j.smith@spartans.nsu.edu || Student GPA: 3.75
Last Name: Gonzales || First Name: Mariana || Student ID: 168790 || Student E-mail: m.gonzales18@spartans.nsu.edu || Student GPA: 4