C++ SUBLEQ interpreter (unfinished)

//This program has some error in it related to it can't find main.
//it was 3 AM when I last looked at it. i fell asleep soon after. (lol)

////////////
//Main File:
////////////

#include <iostream>
#include <ifstream>
#include <ofstream>
#include "SUBLCQ.h"

using namescape std;

int main(int argc, char* argv[])
{
    Memory m = new Memory();
    fstream f(argv[0]);
    if(f.is_open())
    {
        //open a program here for execution here;
    }
    f.close();
    while(!m.Subleq());
    f.open(argv[1]);
    if(f.is_open())
    {
        //open a program for saving here;
    }
    f.close();
    return 0;
}
//////////////
//class header
//////////////

#ifndef SUBLEQ_H
#define SUBLEQ_H

//Program Counter, Accumulator and Terminator
#define PRC 0



//making sure C++ doesn't think I am dealing with ASCII char arrays.
typedef unsigned char byte;

class Memory {
private:
    byte mem[256];
    byte getPCV();
    void setPCV();
    void setPCVS();
    void setPCP();
    byte getVal(byte addr);
public:
    Memory();
    byte Subleq();
};
#endif

////////////////////////////
// class implementation file
////////////////////////////
#include "SUBLEQ.h"

byte Memory::getPCV()
{
    return mem[PRC];
}

byte Memory::getVal(byte addr)
{
    return mem[addr];
}

void Memory::setPCP()
{
    mem[mem[PRC]]=mem[mem[PRC]+1]-mem[mem[PRC]];
}
void Memory::setPCVS()
{
    mem[PRC]=mem[mem[PRC]+2];
}

void Memory::setPCV()
{
    mem[PRC]=mem[PRC]+3;
}

Memory::Memory()
{
    for(int i = 0;i<256;i++)
        mem[i]=0;//do not rely upon it being 0;
    mem[PRC]=1;//set program counter to first spot after it.
}

//returns the stop address.
byte Memory::Subleq()
{
    setPCP();
    if(getVal(getVal(PRC))>127)
        setPCV();
    else
        setPCVS();
    //detect the ascii string "\STOP"
    if(getVal(getVal(PRC))==92&&getVal(getVal(PRC)+1)==83&&getVal(getVal(PRC)+2)==84&&getVal(getVal(PRC)+3)==79&&getVal(getVal(PRC)+4)==80)
    {
        return getVal(PRC);
    }
    else
        return 0;
}