Read a .txt file into arrays

[Lado]

Hello,

So I´m new in C++ programming and I´m trying to read a .txt file into arrays.

My file contains 4 columns separated with space. The first column contains words (just one word per line) and the last three contain numbers. The file has unknown number of lines.

I know how to read a file in c++ but I need help to read the columns into 4 separated arrays.

Does anyone here have a tip to do that ?

thank you.

#include <iostream>
#include <string>
#include <fstream>
#include <cstdlib>

using namespace std;

int main()
{
    string thefilename;
    ifstream infile;

    cout << " Write the file path : " << endl;
    cin >> thefilename;
    cout << endl;

    infile.open(thefilename.c_str());
    if ( infile.fail() ) {
        cout << " Cannot open file: " << thefilename << endl;
        exit(1);
    }


    infile.close();
    return 0;
}

So the file contains information about number of students at a university.

The 1 column contains information about the department, 2 column contains the year, 3 contains number of men and the 4 column contains number of women.

The program needs to give the user a menu to choose from.
If the user chooses "0: total " then the program gives number of student each per year that the file contains independent of what the student was studying.

and if the user chooses for example "1: business" than the programprogram gives number of students per each year at the business program

[AbstractionAnon]

The first column contains words

That statement is not clear. Can the first column contain more than one word? If so, the problem is a little harder.

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


const int MAX_ROWS = 100;

int main()
{   string thefilename;
    ifstream infile;
    string col1[MAX_ROWS];
    int col2[MAX_ROWS], col3[MAX_ROWS], col4[MAX_ROWS];
    int count = 0;
    
    cout << " Write the file path : " << endl;
    cin >> thefilename;
    cout << endl;

    infile.open(thefilename.c_str());
    if ( infile.fail() ) 
    {   cout << " Cannot open file: " << thefilename << endl;
        exit(1);
    }
    
    while (infile >> col1[count] >> col2[count] >> col3[count] >> col4[count] && count < MAX_ROWS)
    {   //  Read succeded
        //  Do something with the columns
        count++;
    }

    infile.close();
    return 0;
}

PLEASE USE CODE TAGS (the <> formatting button) when posting code.
It makes it easier to read your code and also easier to respond to your post.
http://www.cplusplus.com/articles/jEywvCM9/
Hint: You can edit your post, highlight your code and press the <> formatting button.

[Lado]

The first column only contains one word per line.

And I need to read the columns into separate arrays. col1[]

[AbstractionAnon]

And I need to read the columns into separate arrays. col1[]

The code I posted above reads the columns into separate arrays (col1,col2,col3,col4).

[Lado]

Thank you!

So the file contains information about number of students at a university.

The 1 column contains information about the department, 2 column contains the year, 3 contains number of men and the 4 column contains number of women.

The program needs to give the user a menu to choose from.
If the user chooses "0: total " then the program gives number of student each per year that the file contains independent of what the student was studying.

and if the user chooses for example "1: business" than the programprogram gives number of students per each year at the business program