Help making a shell

[cory244]

Hello so I am a bit rusty, and by that I mean like SUPER rusty.
I have this program that creates a file system and then I need to make the shell to interact with it. I need help with my default constructor as odd as that may sound.
Here is my Shell class please help.

#include<iostream>
#include<string>
#include<fstream>
#include<sstream>
#include<vector>
#include"Sdrive.h"
#include"Filesys.h"

using namespace std;


class Shell: public Filesys
{
Public :
Shell(string filename, int blocksize, int numberofblocks);
int dir();// lists all files
int add(string file);// add a new file using input from the keyboard
int del(string file);// deletes the file
int type(string file);//lists the contents of file
int copy(string file1, string file2);//copies file1 to file2
};

Shell:: Shell(string filename, int blocksize, int numberofblocks)
{

}
int Shell:: del(string file)
{
    if(remove(file) != 1)
    {
        cout << "Error deleting file" << endl;
    }
    else
        cout << "File removed successfully" << endl;
    return 1;
}
int Shell::dir()
{
    vector<string> flist=ls();
    for (i=0; i<flist.size(); i++)
    {
        cout << flist[i] << endl;
    }
}

int Shell:: add (string filename)
{
    int ecode = newfile(filename);
    if(ecode < 1)
    {
        return 0;
    }
    cout << "Enter data followed by a ^" << endl;

    string buffer;
    char x;
    cin.get(x);
    while(x != 'n')
    {
        buffer += x;
        cin.get(x);
    }
    vector <string> blocks =block(buffer, getblocksize);

    for(int i = 0; i < blocks.size(); i++)
    {
        int blockid = addblock(filename, blocks[i]);
    }
    return 1;
}