#include <iostream>
#include <fstream>
#include <sstream>
using namespace std;
 
#define SCREAM cout << "OMAGAWD" << endl
 
int main(int argc, char *argv[])
{
//    <src> <dest> [<offset> [<bytes, 0 = all> [<offset>]]
    //writes bytes bytes from src+offset to dest+offset
 
    size_t in_offset;
    size_t bytes;
    size_t out_offset;
 
    in_offset = bytes = out_offset = 0;
 
    stringstream buf;
 
    switch (argc)
    {
    case 6:
    SCREAM;
        buf.str(argv[5]);
        buf >> out_offset;
 
    case 5:
    SCREAM;
        buf.str(argv[4]);
        buf >> bytes;
 
    case 4:
    SCREAM;
        buf.str(argv[3]);
        buf >> in_offset;
 
    default:
        ifstream in(argv[1], ios::binary);
        ofstream out(argv[2], ios::binary);
        break;
    }
 
    cout << "Writing from " << argv[1] << " + " << in_offset <<  " to " << argv[2] << " + " << out_offset << " for " << bytes << " bytes" << endl;
 
    return 0;
}

OMAGAWD
OMAGAWD
OMAGAWD
Writing from aap + 0 to noot + 3 for 0 bytes