read from file into array

[obad]

Hi ,
I have this code which is capable to read from file only one column , I need it read two column. So, how can I alter it to read from file and place the value in array ?
Note : the data file format like that :

10.2 30.3 12.4 ........
34.56 45.9 34.5.......
12.3 12.45 10.10.....
.
.
.

QTextStream in(&file);
     unsigned int max_lines = 20000; // we choose 102 because in the real file there are two header lines in the top of file
     float data[max_lines];
     unsigned int lines_read =0;
 
     for(int i=lines_read ;i<max_lines;i++)
     {
        double x;
        QString content;
        in >> x;
        content = content.setNum(x);
 
        data[i]=content.toDouble();
        in.readLine();
        lines_read++;
     }

QTextStream in(&file);
     unsigned int max_lines = 20000; // we choose 102 because in the real file there are two header lines in the top of file
     float data[max_lines];
     unsigned int lines_read =0;

     for(int i=lines_read ;i<max_lines;i++)
     {
        double x;
        QString content;
        in >> x;
        content = content.setNum(x);

        data[i]=content.toDouble();
        in.readLine();
        lines_read++;
     }

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[SixDegrees]

Read both of the values you want into variables within your loop body. If you need to skip a value in the middle, read it into a dummy variable.\\

Why are you using both the input operator (>>) and readline()? Also, why not just read directly into your array instead of performing all the conversions? And since data[] is an array of float, why are you converting to a double?