Modulus of difference of positive integer elements

Troyer

Hi!
I'm making a table through a two dimensional array with random numbers and I can't implement the equation for my loop:
Modulus of difference of positive integer elements.

How can i do this?

double my_rand(int accuracy) {

    double a = 0;
    a = (qrand() % int (qPow(10, accuracy) + 10000))/qPow(10, accuracy);
    return a;

}


void MainWindow::Mouse_Pressed_menu(){
    model = new QStandardItemModel(5, 2, this);

    ui->tableWidget->setRowCount(10);
    ui->tableWidget->setColumnCount(4);

    int count = 1;
    for (int i = 0; ui->tableWidget->rowCount(); i++) {
        for (int j = 0; j < ui->tableWidget->columnCount(); j++) {

            QTableWidgetItem *itm = new QTableWidgetItem(tr("%1").arg(my_rand(2)));

            ui->tableWidget->setItem(i, j, itm);
            count++;

        }
    }
}

mrjj

Hi
What are you asking ?

Modulus of difference of positive integer elements.
Difference between ?
Cols / rows ?

Troyer

@mrjj
A random value is output between rings / rows, and after that I need to find the difference module of all positive integers (so far I only have integers in the table) in the table and output, for example, in TextEdit

mrjj

@Troyer
So diff between col 1 and col 2?
and diff between col 3 and col 4 ? and so on ?

Troyer

@mrjj All at once)

mrjj

@Troyer
between rows ?
so sum of row 1 diff to sum of row 2 ?

Troyer

@mrjj Yes, that's it

mrjj

@Troyer
Hi
you can use the same loops to get the items.
you need a list to store the sums pr row.

 for (int i = 0; ui->tableWidget->rowCount(); i++) {
        for (int j = 0; j < ui->tableWidget->columnCount(); j++) {
            QTableWidgetItem *itm = ui->tableWidget->item(i,j);
           // sum the cols here
        }
 //   add sum to list
}

then after you can loop the sum list and take diff.