How to change this coding? (More details in the what I have tried)

#include <iostream>
#include <fstream>
#include<string>
using namespace std;
int ID;
struct Student {
    int id;
    string name;
    int form;
    string degree;
    int semesterNo;
};

void addStudent() {
    Student student;
    cout << "\n\tEnter student name : ";
    cin.get();
    getline(cin, student.name); 
    cout << "\n\tEnter student age : ";
    cin >> student.form;
    cout << "\n\tEnter student degree : ";
    cin >> student.degree;
    cout << "\n\tEnter student semester number : ";
    cin >> student.semesterNo;
    ID++;

    ofstream write;
    write.open("student.txt", ios::app);
    write << "\n" << ID;
    write << "\n" << student.name;
    write << "\n" << student.form;

    write << "\n" << student.degree;
    write << "\n" << student.semesterNo;
    write.close();
    write.open("id.txt");
    write << ID;
    write.close();
    cout << "\n\tData save to file";
}

void print(Student s) {
    cout << "\n\t---Current List---";
    cout << "\n\tID is : " << s.id;
    cout << "\n\tName is : " << s.name;
    cout << "\n\tAge is : " << s.form;
    cout << "\n\tDegree is : " << s.degree;
    cout << "\n\tSmester Number is : " << s.semesterNo;

}

void readData() {
    Student student;
    ifstream read;
    read.open("student.txt");
    while (!read.eof()) {
        read >> student.id;
        read.ignore();
        getline(read, student.name);
        read >> student.form;
        read >> student.degree;
        read >> student.semesterNo;
        print(student);
    }
    read.close();
}

int searchData() {
    int id;
    cout << "\n\tEnter student id want to search : ";
    cin >> id;
    Student student;
    ifstream read;
    read.open("student.txt");
    while (!read.eof()) {
        read >> student.id;
        read.ignore();
        getline(read, student.name);
        read >> student.form;
        read >> student.degree;
        read >> student.semesterNo;
        if (student.id == id) {
            print(student);
            return id;
        }
    }
}

void deleteData() {
    int id = searchData();
    cout << "\n\tYou want to delete record (y/n) : ";
    char choice;
    cin >> choice;
    if (choice == 'y') {
        Student student;
        ofstream tempFile;
        tempFile.open("temp.txt");
        ifstream read;
        read.open("student.txt");
        while (!read.eof()) {
            read >> student.id;
            read.ignore();
            getline(read, student.name);
            read >> student.form;
            read >> student.degree;
            read >> student.semesterNo;
            if (student.id != id) {
                tempFile << "\n" << student.id;
                tempFile << "\n" << student.name;
                tempFile << "\n" << student.form;
                tempFile << "\n" << student.degree;
                tempFile << "\n" << student.semesterNo;
            }
        }
        read.close();
        tempFile.close();
        remove("student.txt");
        rename("temp.txt", "student.txt");
        cout << "\n\tData deleted successfuly";
    }
    else {
        cout << "\n\tRecord not deleted";
    }
}

void updateData() {
    int id = searchData();
    cout << "\n\tYou want to update record (y/n) : ";
    char choice;
    cin >> choice;
    if (choice == 'y') {
        Student newData;
        cout << "\n\tEnter student name : ";
        cin.get();
        getline(cin, newData.name);
        cout << "\n\tEnter student age : ";
        cin >> newData.form;
        cout << "\n\tEnter student degree : ";
        cin >> newData.degree;
        cout << "\n\tEnter student semester number : ";
        cin >> newData.semesterNo;
        Student student;
        ofstream tempFile;
        tempFile.open("temp.txt");
        ifstream read;
        read.open("student.txt");
        while (!read.eof()) {
            read >> student.id;
            read.ignore();
            getline(read, student.name);
            read >> student.form;
            read >> student.degree;
            read >> student.semesterNo;
            if (student.id != id) {
                tempFile << "\n" << student.id;
                tempFile << "\n" << student.name;
                tempFile << "\n" << student.form;
                tempFile << "\n" << student.degree;
                tempFile << "\n" << student.semesterNo;
            }
            else {
                tempFile << "\n" << student.id;
                tempFile << "\n" << newData.name;
                tempFile << "\n" << newData.form;
                tempFile << "\n" << newData.degree;
                tempFile << "\n" << newData.semesterNo;
            }
        }
        read.close();
        tempFile.close();
        remove("student.txt");
        rename("temp.txt", "student.txt");
        cout << "\n\tData updated successfuly";
    }
    else {
        cout << "\n\tRecord not deleted";
    }
}

int main()
{
    ifstream read;
    read.open("id.txt");
    if (!read.fail()) {
        read >> ID;
    }
    else {
        ID = 0;
    }
    read.close();

    while (true) {
        cout << "\n\t1.Add student data";
        cout << "\n\t2.See student data";
        cout << "\n\t3.Search student data";
        cout << "\n\t4.Delete student data";
        cout << "\n\t5.Update student data";

        int choice;
        cout << "\n\tEnter choice : ";
        cin >> choice;
        switch (choice) {
        case 1:
            addStudent();
            break;
        case 2:
            readData();
            break;
        case 3:
            searchData();
            break;
        case 4:
            deleteData();
            break;
        case 5:
            updateData();
            break;
        }
    }

}

20ACD1234
Alice Lim
1
80 93 78 75 86 82 67

Student ID: 20ACD1234
Student Name: Alice Lim
Form: 1
BM: 80
BI: 93
BC: 78
Math: 75
Sci: 86
Sejarah: 82
Geo: 67

Main Menu Page:
Please select your choice:
1. Insert 
2. Filter/ Search 
3. Modify 
4. View Results 

//Insert
Please enter student information and marks.
Student Id: 20ACD1234
Student Name: Alice Lim
Form: 1
BM: 80
BI: 93
BC: 78
Math: 75
Sci: 86
Sejarah: 82
Geo: 67
Do you want to key in another record?
No

//Filter and search
Please select your choice:
1. Filter
2. Search
Choice: 1
Please key in the information that you want to filter.
Form: 1
Subject(s): BC Sci
Filtered list:
Student ID: 20ACD1234
Student Name: Alice Lim
Form: 1
BC: 78
Sci: 86
Student ID: 20ACD1235
Student Name: Derrick Tan
Form: 1
BC: 71
Sci: 68
Do you want to continue?
YesPlease select your choice:
1. Filter
2. Search

Choice: 2
Please key in the keyword you want to search: Alice
Search Results:
Student ID: 20ACD1234
Student Name: Alice Lim
Form: 1
BM: 80
BI: 93
BC: 78
Math: 75
Sci: 86
Sejarah: 82
Geo: 67

And for update and delete:
//Edit
Please select your choice:
1. Edit
2. Delete
Choice:1
Current list:
[Show the available list of student record so that user able to key in the student id by referring to the list]
Please key in the student id that you want to edit: 20ACD1234
Please select the attribute that you want to edit:
1. Name
2. Form
3. Marks
Please key in the attribute that you want to edit: 3
Please enter the subject that you want to change the mark (BM/BI/BC/Math/Sci/Sejarah/Geo): Sejarah
Please update the mark for Sejarah: 87
Do you still have anything to edit for this student?
Yes
Please key in the attribute that you want to edit: 2
Please update the form: 2
Do you still have anything to edit for this student?
No
Do you want to edit record for other students?
No
Successfully updated!
Updated List:
[Show the updated list of student record.]
Do you want to continue?
Yes

//Delete
Please select your choice:
1. Edit
2. Delete
Choice: 2
Current list:
[Show the available list of student record so that user able to key in the student id by referring to the list]
Please key in the student id that you want to delete the entire record: 20ACD1235
Successfully Deleted!
Updated List:
[Show the updated list of student record.]
Do you want to continue?
No