#include <iostream>						// Libraries included
#include <string>
#include <fstream>
#include <sstream>
#include <list>
#include <cctype>
#include <cstdlib>

using namespace std;

//------------------------------------------------------------------------------//
struct Commands		// This is the structure which holds the commands			//
{																				//
  string command;																//
}                                                                               //
commands[20];																	//
//------------------------------------------------------------------------------//

//------------------------------------------------------------------------------//
struct dataValues		// This is the structure which holds the names and		//
{						// and ages from the file								//
  string line;																	//
  string name;																	//
  string number;																//
  int age;																		//
}																				//
numbers[10];																	//
//------------------------------------------------------------------------------//

void Instructions();		// Initialise the function "instructions"	
void AssignName();			// Initialise the function "Assign name"
void ReadInitialise ();	// Reads file

char filename[25], filenamee[25];			// CURRENTLY GLOBAL VARIABLES- DO SOMETHING ABOUT THIS!
string Name2Number, file, file2;
int n, i;			// i is used for the function "fileread"




int main ()								// This is the main program
{

  n = 0;

//---------Opening the file------------
//-------------------------------------

	cout << "Enter File Name: ";
	cin >> filename;			// use "commands.txt". Should be saved in the same directory as code.exe.
    fstream file;		// ifstream is used for reading files. 
	file.open(filename);

    if (!file)					// If we couldn't open the output file stream for reading
    {
        cerr << filename << " could not be opened for reading!" << endl;	// Print an error
        exit(1);
    }
   
//--------------The following lines are used to read in the text file line by line, assign---------------
//------------the line to a string, and assign the string to the data structure numbers.line-------------

	while (file)				// While there's still stuff left to read the code inside the brackets loops.
	
	{
		n++;
        std::string strInput;
        file >> strInput;
		commands[n].command = strInput;
		cout << "\n" << commands[n].command;
	}

	Instructions();

	file.close();
	file.clear();					// should clear the problem of having two files open at once. clears state flags

	ReadInitialise; // it was ok until I called this function
	
	return 0;
}

//---------------The function "Instructions" assigns each instruction to the data structure--------------
//-------------------------------------------------------------------------------------------------------
void Instructions()
{
	
	
	for (i = 1 ; i <=20; i++)
	{
		if (commands[i].command == "r")
		cout << "read in file\n";
		else if (commands[i].command == "s")
		cout << "sort data\n";
		else if (commands[i].command == "w")
		cout << "write data to output\n";
		else if (commands[i].command == "i")
		{
			cout << "insert a new element in the structure WITHOUT destroying the ordering\n";
			AssignName();
			
		}

		else if (commands[i].command == "d")
		cout << "delete an element in the structure WITHOUT destroying the ordering\n";
		else if (commands[i].command == "x")
		cout << "reverse order of linked list\n";
		else if (commands[i].command == "a")
		cout << "calculate average valu\ne";
		else if (commands[i].command == "m")
		cout << "calculate maximum value\n";
		
	}
}

void AssignName()
{
		string newName;
		newName = commands[i+1].command;
	    cout << newName;
}


void ReadInitialise ()								    // This reads the data file, and 
{														// puts the data from it into the
														// data structure dataValues
  n = 0;

//---------Opening the file------------
//-------------------------------------

	cout << "Enter File Name: ";
	cin >> filenamee;			// use "example.txt". Should be saved in the same directory as code.exe.
    fstream file2;				// ifstream is used for reading files. 
	file2.open(filenamee);

    if (!file2)					// If we couldn't open the output file stream for reading
    {
        cerr << filenamee << " could not be opened for reading!" << endl;	// Print an error
        exit(1);
    }
   
//--------------The following lines are used to read in the text file line by line, assign---------------
//------------the line to a string, and assign the string to the data structure numbers.line-------------

	while (file2)				// While there's still stuff left to read the code inside the brackets loops.
	
	{
		n++;
        std::string strInput;
        file2 >> strInput;
		numbers[n].line = strInput;
	}

//-------------Set alternate lines from the names of the input file (names are put on odd lines)-----------
//----------------------and initialises name values in data structure--------------------------------------

	for ( int a = 1; a <= n; a++ )	// loops until it reaches the end of the file. 
	{									   // n depends on size of data structure.
		int y;
		y= (2*a)-1;
		numbers[a].name = numbers[y].line;
	}

//--------------Set alternate lines from the ages of the input file (ages are put on even lines)-----------
//--------------------------and initialises age values in data structure-----------------------------------

	for ( int b = 1; b <= n; b++ )
	{
		int z;
		z= (2*b);
		numbers[b].number = numbers[z].line;

	}; 

//--------------------------Sets age values to integers for working with-----------------------------------
//---------------------------------------------------------------------------------------------------------

	for ( int v = 1; v <= 9; v++ )
	{
		std::string myString = numbers[v].number;    
		int value = atoi(myString.c_str());					// converts string to integer
		numbers[v].age = value;
	}

//-------------------Prints all data from structure (for reference only)-----------------------------------
//---------------------------------------------------------------------------------------------------------
	
    for ( int i = 1; i <= 9; i++ )
		cout << numbers[i].line << "\n";

	for ( int p = 1; p <= 9; p++ )
		cout << numbers[p].name << "\n";

	for ( int q = 1; q <= 9; q++ )
		cout << numbers[q].number << "\n";

	for ( int u = 1; u <= 9; u++ )
		cout << numbers[u].age <<"\n";  

//---------------------------------------------------------------------------------------------------------
//---------------------------------------------------------------------------------------------------------

	file2.close();
	file2.clear();
};

	ReadInitialise; // it was ok until I called this function

	ReadInitialise();