结构c ++的问题

Question

所以，我有一个包含int值的二进制文件。所以int需要4个字节。

#include <iostream>
#include <cstdio>


using namespace std;


class IntFile
{
public:
    //int index = 0;
    int value;
    FILE* file;
    IntFile() {}
    ~IntFile() {}
    int mnumbers[10];
    int mnumbers2[10];

    // get value from current index in file
    int getValue(int index)
    {
        fseek(file, 4*index, SEEK_SET);
        fread(&value, 4, 1, file);
        return value;
    }

    friend struct Move;
    struct Move
    {
        int index = 0;
        int value = 0;

        bool operator==(const Move&other) const
        {
            return index == other.index;
        }
        bool operator!=(const Move&other) const
        {
            return index!=other.index;
        }

        int &operator*()
        {
            return value = IntFile::getValue(int index); <- this thing does not work, I am getting errors like expected primary expressions..
        }
        Move&operator++()
        {
            this->index = index+1;
            return *this;

        }
        Move&operator--()
        {
            this->index = index -1;
            return *this;
        }
    };
    Move begin()
    {
        fseek(file, 0, SEEK_SET);
        //index = 0;

    }
    Move end()
    {
        fseek(file, 0, SEEK_END);
        //index = 9;
    }
};



int main()
{
    IntFile file;
    int A;

    for ( int i = 0; i < 10; i++)
    {
        file.mnumbers2[i] = 0;
        cout << file.mnumbers2[i] << " "; // make every element of array = 0
    }


    file.file = fopen("text.txt", "r+b");

    for (IntFile::Move Iter = file.begin(); Iter != file.end(); ++Iter)
    {
        fread(file.mnumbers2,4,1,file.file);
        cout << " I " << endl;
        //cout << "Iterator: " << Iter;
    }

    cout << endl;
    A = file.getValue(5);
    cout << "A: " << A << endl;

    for ( int i = 0; i < 10; i++)
    {
        cout << file.mnumbers2[i] << " ";
    }

    ////////////////////////////////////////
    fclose(file.file);
    return 0;
}

但我没有进入这个循环

for (IntFile::Move Iter = file.begin(); Iter != file.end(); ++Iter)
    {
        fread(file.mnumbers2,4,1,file.file);
        cout << " I " << endl;
        //cout << "Iterator: " << Iter;
    }

在begin()中，我们将光标放在文件的乞讨位置，最后end() 显然，光标应该在文件的末尾。我的那个不起作用。 你能给我什么提示吗？我基本上需要operator*和begin(), end()

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