//
    //  main.cpp
    //  countFile
    //
    //  Created by Arnar 就r Sveinsson on 9/27/12.
    //  Copyright (c) 2012 Arnar 就r Sveinsson. All rights reserved.
    //

#include <iostream>
#include <fstream>
#include <ostream>
#include <cstdlib>

using namespace std;
    //Declare all functions
void input(char* in_name, char* out_name);
void count_file(ifstream &inFile, char next_char, char prev_char, int &word_count, int &char_count, int &line_count);
void output(ostream &output, int wo_count, int ch_count, int li_count);
int main()
{   //Declare in and out name for filestream and set as an array with maximum 50 characters
    char in_name[50];
    char out_name[50];
        //Declaring all counters, set word and char to 0 but line to 1 because even though you have no words you'll always have 1 line
    int word_count = 0, char_count = 0, line_count = 0;
    char next_char = ' ', prev_char = ' ';
        //Declare the stream to get a file input and output
    ifstream inFile;
    ofstream outFile;
        //Call the input function
    input(in_name,out_name);
        //Open files
    inFile.open(in_name);
    outFile.open(out_name);
        //Check if input file opened
    if (!inFile)
    {
        cout << "Unable to open the file " << in_name;
        exit(1);
    }
        //Call the count function which counts words, characters and lines
    count_file(inFile, next_char, prev_char, word_count, char_count, line_count);
        //Call the output function which writes out the results on the screen and to another file.
    output(outFile, word_count, char_count, line_count);
    output(cout, word_count, char_count, line_count);
        //Close the files
    inFile.close();
    outFile.close();
    return 0;
}
    //Function that takes an input as a string and returns it
void input(char* in_name, char* out_name)
{
    cout << "Write in the full name of the file you want to use as an input file (maximum 50 characters):  ";
    cin >> in_name;
    cout << "Write in the full name of the file you want to use as an output file (maximum 50 characters): ";
    cin >> out_name;
}
    //Count function that counts words, characters and lines
void count_file(ifstream &inFile, char next_char, char prev_char, int &word_count, int &char_count, int &line_count)
{
        //Get the first character
    inFile.get(next_char);
        //If that character isn't EOF then add 1 to line count and char count.
    if(!inFile.eof())
    {
        line_count++;
        char_count++;
    }
        //While there are characters to get add one to char count
    while (inFile.get(next_char))
    {
        char_count++;
            //If that character isn't a space and the previous character is a space then add 1 to word count
        if (!isspace(next_char) && isspace(prev_char))
            word_count++;
        if (next_char == '\n')
                //If the next character is a newline character then add one to the line count
            line_count++;
            //Make the current char the previous one to make the loop run again if there are more characters.
        prev_char = next_char;
    }
}

    //Output function that writes out to a file and to the screen
void output(ostream &output, int wo_count, int ch_count, int li_count)
{
        //Write out the results to an output source
    output << "The input contains:" << endl << li_count << " lines" << endl << wo_count << " words" << endl << ch_count << " characters";
}