// Name: msglm
// Date: 
// Program Name:
// Description: 


#include <iostream>
#include <fstream>
#include <string>
using namespace std;

// Named constants
int ARR_SIZE = 50; //Personally, i'd pass this as an env var or a flag

int main() {

    //Variable declaration
    string tmpArr[ARR_SIZE]; //Probably could pass through the file first to get the size first and declare this, but that's past this program's scope.
    int epoch = 0; //both counts up and is the length of the array.  
    
    //Vars necessary to invert an array
    int start = 0;
    string tmp;
    int end = 0;

    //It's a shame this isn't STDIN and STDOUT
    ifstream inFile;
    ofstream outFile;

    // User input
    if (inFile) {
        
        inFile.open("in.txt");
        outFile.open("out.txt");
        
        //Read the line, put it at the epoch in the array, also check if EOF. if EOF, abort.
        while(getline(inFile, tmpArr[epoch]) && inFile.peek() != EOF) {  
            cout << tmpArr[epoch] << endl;
            outFile << tmpArr[epoch] << endl;
            epoch = epoch + 1;
        }

        //Epoch is assumed to be the length of the variable at this point, so will use accordingly
        end = epoch;
        
        //exchange the positions of the first and last var in an array while slowly moving to the center
        //i.e 
        //on first pass of the while look will turn [1, 2, 3, 4] into [4, 2, 3, 1]
        //and the second will turn [4, 3, 2, 1]
        //
        //I opted to use this algorithm to not create any more data
        while (start < end) {
            tmp = tmpArr[start];
            tmpArr[start] = tmpArr[end];
            tmpArr[end] = tmp;
            start = start + 1;
            end = end - 1;
        }
        //finally, output the reversed array and dump it into a file
        for(int i=0;i<epoch+1;i++) { 
            cout << tmpArr[i] << endl;
            outFile << tmpArr[i] << endl;
        }

        return 0;
    } else {
        cout << "ERROR. Input File doesn't exist!";
        return 1;

    }
}
/*
   This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License Version 3 ONLY as published by the Free Software Foundation.

   This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details.

   You should have received a copy of the GNU Affero General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
   */