Question

I think I probably have to use an fstream object but i’m not sure how. Essentially I want to read in a file into a byte buffer, modify it, then rewrite these bytes to a file. So I just need to know how to do byte i/o.

Answer 1

#include <fstream>

ifstream fileBuffer("input file path", ios::in|ios::binary);
ofstream outputBuffer("output file path", ios::out|ios::binary);
char input[1024];
char output[1024];

if (fileBuffer.is_open())
{
    fileBuffer.seekg(0, ios::beg);
    fileBuffer.getline(input, 1024);
}

// Modify output here.

outputBuffer.write(output, sizeof(output));

outputBuffer.close();
fileBuffer.close();

From memory I think this is how it goes.