LemonPOS / C++

[memyself]

Hy,

I need some help with lemonPOS "persa" and the c++ source.

LINK: http://sourceforge.net/apps/mediawiki/lemonpos/index.php?title=Main_Page
Source: http://sourceforge.net/projects/lemonpos/files/lemonpos/persa/lemonpos-persa-0.8.tar.bz2/download

In the "producteditor.cpp" file (persa/squeeze/src) the finalprice is calculatet.
I need to get the utility calculated not the final price.
Something like "utility = finalPrice - tax - tax2 - cost;"
So that I put in cost, tax and final price and can see what the utility is.

Can somebody please tell me where and how to change source to get this working.

Thanks for your help!

[j7%<RmUg]

Just try experimenting with it, thats what programming is all about. Im also not going to help you if this is homework.

[memyself]

I tryed experimenting with it! Always got error messages. I never learned c++! And no, its no homework.
This didn't make errors but don't work as I wanted:

void ProductEditor::calculatePrice()
{
double finalPrice=0.0;
if (ui->editCost->text().isEmpty()) {
ui->editCost->setFocus();
}
else if (ui->editUtility->text().isEmpty()) {
ui->editUtility->setFocus();
}
else if (ui->editTax->text().isEmpty()) {
ui->editTax->setText("0.0");
ui->editTax->setFocus();
ui->editTax->selectAll();
}
else {
if (ui->editExtraTaxes->text().isEmpty()) {
ui->editExtraTaxes->setText("0.0");
ui->editExtraTaxes->setFocus();
ui->editExtraTaxes->selectAll();
}
//TODO: if TAXes are included in cost...
double cost = ui->editCost->text().toDouble();
double utility = ui->editUtility->text().toDouble();
double tax = ui->editTax->text().toDouble();
double tax2 = ui->editExtraTaxes->text().toDouble();
//Utility is calculated before taxes... Taxes include utility... is it ok?
utility = ((utility/100)*(finalPrice - cost - tax));
double cu = cost;
tax = ((tax/100)*cu);
tax2 = ((tax2/100)*cu);
utility = finalPrice - tax - cost;

// BFB: avoid more than 2 decimal digits in finalPrice. Round.
ui->editFinalPrice->setText(QString::number(finalPrice,'f',2));
ui->editFinalPrice->selectAll();
ui->editFinalPrice->setFocus();
}
}

**********************
This is the original source:

void ProductEditor::calculatePrice()
{
double finalPrice=0.0;
if (ui->editCost->text().isEmpty()) {
ui->editCost->setFocus();
}
else if (ui->editUtility->text().isEmpty()) {
ui->editUtility->setFocus();
}
else if (ui->editTax->text().isEmpty()) {
ui->editTax->setText("0.0");
ui->editTax->setFocus();
ui->editTax->selectAll();
}
else {
if (ui->editExtraTaxes->text().isEmpty()) {
ui->editExtraTaxes->setText("0.0");
ui->editExtraTaxes->setFocus();
ui->editExtraTaxes->selectAll();
}
//TODO: if TAXes are included in cost...
double cost = ui->editCost->text().toDouble();
double utility = ui->editUtility->text().toDouble();
double tax = ui->editTax->text().toDouble();
double tax2 = ui->editExtraTaxes->text().toDouble();
//Utility is calculated before taxes... Taxes include utility... is it ok?
utility = ((utility/100)*cost);
double cu = cost + utility;
tax = ((tax/100)*cu);
tax2 = ((tax2/100)*cu);
finalPrice = cost + utility + tax + tax2;

// BFB: avoid more than 2 decimal digits in finalPrice. Round.
ui->editFinalPrice->setText(QString::number(finalPrice,'f',2));
ui->editFinalPrice->selectAll();
ui->editFinalPrice->setFocus();
}
}

Some tip?

[TGArcher]

Yeah. a good tip is use code tags. they look like this:



some code here


then we might be able to help out a little better.