Hello
I am writing a program that is supposed to read from an input txt file values into a 2d array.
The file has about 13500 lines of 75 values each, separated by spaces. at the end of each line there is no space, just '\n'
I need to make some operations with the values in the file, so I will have to read the file into a 2d array.
The thing is, because of the end of line not having a space character, I am having alot of trouble reading the values into the array.
Can anyone help me?

Code:
#include "stdafx.h"
#include <iostream>
#include <conio.h>
#include <time.h>
#include <fstream>
#include <cstdlib>
#include <istream>
#include <iomanip>
#include <sstream>
#include <string>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
using namespace std;
#define SCREEN_HEIGHT 50


fstream datafile;                 /*Original data file*/
ofstream outputfile;
string infilename,outfilename,A[13316][75],line;
int option,menuin,menuout,menualg,number_of_lines,col;
double matrix[13316][75],sum=0;


void clrscr()
{
    int i;
    for ( i = 0; i < SCREEN_HEIGHT; i++ )
        putchar ( '\n' );
}


int readfromfile()                                /*Reads the first line of the file into variable "line"*/
{
    if (datafile.is_open())
    {
        getline (datafile,line);
        datafile.close();
    }
    return 0;
}


int writetofile ()                                /*Test function. Writes "line" to the output file.*/
{
    cout << "\nThe line\n \n" << line << "\n\nwas copied variable line" << endl;/*Gives feedback of the copied line to user.*/
    return 0;
}


string Inputfilename()
{
    clrscr();
    cout << "What is the name of your data input file?\n";
    cin >> infilename;
    datafile.open(infilename);
    while(!datafile)
        {
            cout << "Filename invalid. Try again!\n";
            cin >> infilename;
            datafile.open(infilename);
        }
    if (datafile)            /*Verificare existenta fisier*/
        {
            cout << "Filename saved. Press any key...\n";
            getchar();
        }
    return infilename;
}


string Outputfilename()
{
    clrscr();
    cout << "What is the name of your data output file?\n";
    cin >> outfilename;
    outputfile.open(outfilename);
    while(!outputfile)
        {
            cout << "Filename invalid. Try again!\n";
            cin >> outfilename;
            outputfile.open(outfilename);
        }
    if (outputfile)        /*Verificare existenta fisier*/
        {
            cout << "Filename saved. Press any key...\n";
            getchar();
        }
    return outfilename;
}


int linesinfile()                            /*Calculates the number of lines in datafile(the number of rows in matrix)*/
{
    datafile.open(infilename);
    cout << "Computing number of rows...\n";
    number_of_lines=0;
    std::string liney;
    while (std::getline(datafile, liney))
    {
        ++number_of_lines;
    }
    datafile.close();
    std::cout << "Number of rows is: " << number_of_lines <<"\n";
    return number_of_lines;
}


int columns()                            /*Calculates the number of columns in datafile*/
{
    datafile.open(infilename);
    cout << "Computing number of columns...\n";
    col=0;
    for (int i=0;i<=line.size();i++)
        if (line[i]==' ')
            col++;
    col = col++;
    datafile.close();
    cout << "Number of columns is: " << col <<"\n";
    return col;
}


int Algorythm(int N, int M)
{
    clrscr();
    datafile.open(infilename);
    if(!datafile) //Always test the file open.
    {
                cout << "Error opening output file" << endl;
                system("pause");
    }
    cout << "Reading file to a string matrix...\n";
    while(!datafile.eof())
    {
        for(int R=0;R<N;R++)
            for(int C=0;C<M;C++)
                getline(datafile,A[R][C],' ');
    }


    cout << A[0][74];
    /*cout << "Converting string matrix to a double matrix...\n";
    for(int R=0;R<N;R++)
        for(int C=0;C<M-1;C++)
            matrix[R][C] = atof(A[R][C].c_str());
    for(int i=0;i<M-1;i++)
        cout << A[0][i] << "\n";
    cout << A[1][0];
    
    getchar();
    cout << "Writing the matrix as double in the output\n";
    outputfile.open(outfilename);
    for(int R=0;R<N;R++)
            for(int C=0;C<M;C++)
            {
                matrix[R][C] = stod( A[R][C] );
                outputfile << matrix[R][C] << ' ';
            }
    outputfile.close();*/
    return 0;
}


int main()
{
    cout << "This program reads the 0.3 step data from an input file and generates an output file with 3 step data.\nPress any key to start...\n";
    Inputfilename();
    Outputfilename();
    readfromfile();
    columns();
    linesinfile();
    Algorythm(number_of_lines,col);
    getchar();
    return 0;
}