写入.dat文件会导致写入随机的中文字符

I have this program:

我有这个程序:

using namespace std;

class Motherboards
{
    char Board_Manufacturer_Name[50];
    char Socket_Type[50];
    char Chipset_Type[50];
    char Board_Name[50];
    char Feature1[500];
    char Feature2[500];
    char Feature3[500];
    float Price;

    public:
    void getdata();
    void displaydata();
};
void Motherboards::getdata()
{
    cout << " Enter Manufacturer Name :\n";
    cin.getline(Board_Manufacturer_Name, 50);
    cout << "\n Enter the Socket type :\n";
    cin.getline(Socket_Type, 50);
    cout << "\n Enter the Chipset Type :\n";
    cin.getline(Chipset_Type, 50);
    cout << "\n Enter the Board Name :\n";
    cin.getline(Board_Name, 50);
    cout << "\n Enter 3 main features for this Board :\n";
    cout << "\n1.) ";
    cin.getline(Feature1, 500);
    cout << "\n2.) ";
    cin.getline(Feature2, 500);
    cout << "\n3.) ";
    cin.getline(Feature3, 500);
    cout << "Price :\n";
    cin >> Price;
    cout << "\n";
}
void Motherboards::displaydata()
{
    cout << " Manufacturer : " << Board_Manufacturer_Name << endl;
    cout << " Socket : " << Socket_Type << endl;
    cout << " Chipset : " << Chipset_Type << endl;
    cout << " Board Name : " << Board_Name << endl;
    cout << " Features :\n" << "1.) " << Feature1 << endl
        << "2.) " << Feature2 << endl
        << "3.) " << Feature3 << endl;
    cout << " Price :\n" << Price;
    cout << "\n";
} 

int main()
{
    int x;
    system("cls");
    Motherboards M;
    fstream Infile;
    Infile.open("MotherboardList.dat", ios::in | ios::out | ios::app);
    if (!Infile)
    {
        cerr << "Error :";
    }
    cout << "Enter the details of the motherboard that you want to add :\n";
    M.getdata();
    Infile.write((char*)&M, sizeof(M));
    cout << "Do you wanna confirm ?";
    M.displaydata();
    cin >> x;
    cout << "Written :\n";
    Infile.read((char*)&M, sizeof(M));
    M.displaydata();
    Infile.close();

    return 0;
}
using namespac