C++ text file into multi-dimensional array problems

manpreet Best Answer 2 years ago

As part of a school project, I would like to get an inventory *.txt file into an array in C++ and eventually back to a *.txt file at a later part in the program.

The text file will start out with 10 rows that will represent grocery story items and will include three columns that represent the name, price, and quantity of the items. I have been able to read from the file, even add numbers in front of each row that is displayed. Now, I would like to get the text file into a string array so that the "employee" user can make changes to items one at a time and then I can dump that array back into a *.txt file.

The code below is what I have been trying so far. I can get the count of rows in the file, but can't seem to get the columns counted or the data in the rows displayed. When I run the program, I get what appear to be 10 empty lines after it displays the rows (10) and Cols(0).

The columns in the *.txt file are normally separated by a space. I tried a tab, and tried: while(getline(invFile, lines, '\t'); which just caused the console to display what I am guessing was a memory address and then crashed.

Unfortunately, we have not gotten very far into debugging programs, and from the look of the syllabus, I don't think that will be covered very thoroughly, so I don't know how to troubleshoot any further. I have spent the last couple of hours Google-ing, and have gotten to the point that I actually need to ask for help.

The project involves a lot more than this component, but I really am stuck on this part. I am not asking for someone to do this for me, but if anyone has any idea what I am doing wrong and can point me in the best direction to get a text file into a multi-dimensional array, I would really appreciate it.

Thank you.

    #include 
    #include 
    #include 
    #include 
    #include 
    #include 


    int row = 0;
    int col = 0;

    using namespace std;

    int main()
    {
        string lines;
        int x;
        string textArray[2][2];
        ifstream invFile;
        invFile.open("inventory.txt");

        if(invFile.fail()){
            cerr << "The file cannot be opened!";
            exit(1);
        }

        cout << "\n" << endl;
        while(invFile.good()) {

            while(getline(invFile, lines)) {
                istringstream streamA(lines);
                col = 0;
                while(streamA >> x) {
                    cout << x;
                    textArray[row][col] = x;
                    col++;
                }
                row++;
            }
        }

        invFile.close();

        cout << "Rows: " << row << endl;
        cout << "Cols: " << col << endl;
        cout << "\n" << endl;

        for(int i=0; i<row; i++){
            for(int j=0; j<col; j++){
                cout << "Line: " << i << textArray[i][j] << ".";
            }
            cout << "\n";
        }

        return(0);
    }
=============================
    inventory.txt:

    Apples 1.25 20
    Oranges 1.75 20
    Kiwi 2.50 15
    Pineapples 5.50 20
    Tomatoes 
                                                

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