Convert Bash scripts into one-line equivalents [WIP]

#include<iostream>
#include<fstream>
#include<stdlib.h>
#include<string.h>

using namespace std;

int main(int argc, char * argv[])
{
    cout << "CAUTION: This will probably not work with advanced bash scripts. dos, dones and fis only please!\n";

    if (argc != 3)
    {
        cout << "Usage: " << argv[0] << " /path/to/bash.script /path/to/output.file" << endl;
        return 1;
    }

    ifstream FileInput;
    FileInput.open(argv[1]);

    if (FileInput.is_open() == false)
    {
        cout << "Could not find input file \"" << argv[1] << "\", exiting..." << endl;
        return 1;
    }

    ofstream FileOutput;
    FileOutput.open(argv[2], ofstream::trunc);
    FileOutput.close();
    FileOutput.open(argv[2], ofstream::app);

    if (FileOutput.is_open() == false)
    {
        cout << "Could not find output file \"" << argv[2] << "\", creating..." << endl;
    }

    string Buffer;

    while (FileInput.eof() == false)
    {
        getline(FileInput,Buffer);
        if(Buffer[0] != '#')FileOutput << Buffer;

        if(Buffer.size() > 1)
        {
            if (Buffer != "do" && Buffer != "then" && Buffer != "done" && Buffer != "fi" ) FileOutput << ";";

            else if (Buffer.size() >= 4)
            {   //Screw you this kind of works
                if (
                Buffer.substr(Buffer.size() - 2,2) != "do" &&
                Buffer.substr(Buffer.size() - 2,2) != "fi" &&
                Buffer.substr(Buffer.size() - 4,4) != "done" &&
                Buffer.substr(Buffer.size() - 4,4) != "then")
                FileOutput << ";";
            }
        }
    }

    if(FileOutput.fail() == true)
    {
        cout << "Writing probably failed! Have fun guessing why! ( ͡° ͜ʖ ͡°)" << endl;
        return 1;
    }

    FileInput.close();
    FileOutput.close();

    cout << "File (hopefully) converted successfully! New one line equivalent is located at " << argv[2] << endl;
    return 0;
}