IO Binary Writing Using Seekp; Moving Down Lines

This program is supposed to create a binary file called Record.bin, and then write all of the information that the user inputs into that file. Right now it gets to the part where it reads in Student B[10], and it reads B[0] correctly, but all of the following elements of B[] are one step off. I can't figure out how to include a delimiter when the value is an integer.

After that there are some issues with my seeking, but I can't seem to understand why.

#include <iostream>
#include <cstring>
#include <sstream>
#include <istream>
#include <fstream>
using namespace std;
struct Student
{
    char Name[20];
    char ANumber[9];
    int Age;
    float GPA;
};
int main(){
    Student A[10];
    Student B[10];
    for (int i = 0; i < 10; i++){
        cout << "Enter student's name" << endl;
        cin >> A[i].Name;
        cout << "Enter ANumber" << endl;
        cin >> A[i].ANumber;
        cout << "Enter Age" << endl;
        cin >> A[i].Age;
        cout << "Enter GPA" << endl;
        cin >> A[i].GPA;
    }
    fstream fout("Record.bin", ios::out | ios::binary);
    for (int i = 0; i < 10; i++){
        fout << A[i].Name << endl;
        fout << A[i].ANumber << endl;
        fout << A[i].Age << endl;
        fout << A[i].GPA << endl;
    }
    fout.close();
    fstream fin("Record.bin", ios::in);
    char input[25];
    for (int i = 0; i < 10; i++){
        fin.getline(B[i].Name, 25, '\n');
        fin.getline(B[i].ANumber, 25, '\n');
        fin >> B[i].Age;
        fin >> B[i].GPA;
    }
    fin.close();

    fin.open("Record.bin", ios::in);
    Student C;
    string temp2;
    fin.seekp(4 * sizeof(Student), ios::beg);
    fin.getline(C.Name, 25, '\n');
    fin.getline(C.ANumber, 25, '\n');
    fin >> C.Age;
    fin >> C.GPA;

    fin.close();

     fin.open("Record.bin", ios::in | ios::out | ios::binary);
    fin.seekp(4 * sizeof(Student), ios::end);
    fin.write(C.Name, sizeof(C.Name));
    fin.write(C.ANumber, sizeof(C.ANumber));
    fin << C.Age;
    fin << C.GPA;
    fin.close();

}