How delete a record from a file - c++

Question

I am working on a code that creates a binary file that holds structures of student data. One of the things i need to do is to delete a record from a file but I don't know how to do that. I'm not sure how I would go about identifying a record based on the ID number and then delete that file. I would appreciate any help, advice or instructions on what to do.
#include <iostream>
#include <fstream>
#include <stdlib.h>
#include <string>
#include <iomanip>
#include <stdio.h>
#include <string.h>
using namespace std;
const int NAME_SIZE = 5;
struct Student{
char fname[NAME_SIZE];
char id;
};
int main() {
int choice;
fstream file;
int number;
Student person;
cout << "Choose an option on what to do."<< endl;
cout << "Option 1: Create a Binary File." << endl;
cout << "Option 2: Check if a file exist." << endl;
cout << "Option 3: Populate the records of the file." << endl;
cout << "Option 4: Display contents of the file." << endl;
cout << "Option 5: Append a record to the file." << endl;
cout << "Option 6: Delete a record from the file." << endl;
cout << "Option 7: Search for a record in the file." << endl;
cout << "Option 8: Modify a record from the file." << endl;
cout << "Option 9: Sort the file." << endl;
cout << "Option 10: Wipe a file." << endl;
cin >> choice;
if (choice==1){
char strdata[10000];
file.open("output", ios::binary|ios::app|ios::out);
if(file.is_open())
{
cin.getline(strdata, 10000);
file.seekg(ios_base::end);
file.write(strdata, strlen(strdata));
}
file.close();
cout << "Binary File named output has been created."<< endl;
}
if (choice==2){
file.open("output", ios::in | ios::binary);
if (file.fail()) {
cout << "File could not be opened." << endl;
}
else {
cout << "The file is there" << endl;
}
}
if (choice==3){
file.open("output", ios::out | ios::binary);
file.read(reinterpret_cast<char *>(&person), sizeof(person));
cout << "Populating the record with information."<< endl;
cout << "Enter the following data about a person " << endl;
cout << "First Name: "<< endl;
cin.getline(person.fname, NAME_SIZE);
cout << "ID Number: "<< endl;
cin >> person.id;
file.write(reinterpret_cast<char *>(&person), sizeof(person));
file.close();
}
if (choice==4){
fstream MyFile("output",ios::binary|ios::out);
Student person[3];
for(int i = 0; i < 3; i++)
MyFile.read((char *) &person[i], sizeof(Student));
MyFile.close();
}
if (choice==5){
int i;
char fname;
int id;
fstream file;
file.read(reinterpret_cast<char *>(&person), sizeof(person));
cout << "How many records do you want to append?" << endl;
cin >> number;
file.open("output",ios::out|ios::app|ios::binary);
file.write(reinterpret_cast<char *>(&person), sizeof(person));
for(i=1; i<=number; i++)
{
cout<<"Enter the name: "<< endl;
cin >> fname;
cout<<"Enter ID : "<<endl;
cin >> id;
file<<fname<<endl;
file<<id<<endl;
}
file.close( );
}
if (choice==6){
}
if (choice==7){
}
if (choice==8){
}
if (choice==9){
}
if (choice==10){
char answer;
cout << "Are you sure you want to wipe the file? 1 for Yes or 2 for No" << endl;
cin >> answer;
if (answer==1){
std::ofstream ofs;
ofs.open("output", std::ofstream::out | std::ofstream::trunc|ios::binary);
cout << "Output File has succesfully been deleted"<< endl;
ofs.close();
}
if (answer!=1)
{
cout << "File has not been deleted"<< endl;
}
}
}
```