Posts tagged DaCalc

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DaCalc Support normal mode

May 6th

Posted by WilliamX in Software

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Normal mode in DaCalc means DaCalc can work as a common calculator. User can input expression by the calculator panel instead of composing a formula at first, then load it. It saves much time in the scenario when users only want to do some simple calculations.

The another mode in DaCalc is Formula mode, which comes with the first release.

Normal mode is the default mode, but switching between them is easy. Click ‘Load’ in menu to load a formula will switch DaCalc to Formula mode. Click ‘Reset’ in menu will switch back to Normal mode again.

You will notice that the number panel is a litter different for Normal mode and Formula mode.

Try it yourself!

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Formulas for DaCalc

Apr 20th

Posted by WilliamX in Information

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How to use the following formulas:

  1. In DaCalc, composing window, write the expression (red part) to the edit box and save with the name of the formula (black bold part).
  2. Copy every expression (red part) to a file and saved the file with the name of the formula (black bold part) to /sdcard/DaCalc. Open DaCal, in Load window, click Import in the menu.

Minimal request DaCalc version: 1.2.0.0

  1. Monthly mortgage:
    monthly mortgage=principal*rate*(1+rate)^month/((1+rate)^month-1)
  2. Best sell price for a stock:
    sell price=profit/shares + badeprice * (1+rate)/(1-rate-tax)
  3. Body mass index:
    bmi=weight / (height / 100) ^ 2
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Main Window

How to use DaCalc

Apr 16th

Posted by WilliamX in Software

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DaCalc is an formula calculator running on Android mobile system. It can be used to calculate like tips, tax and so on. In the following session, I will show you how to use DaCalc to calculate tips in your Android mobile phone, like Hero.

Main Window

Figure 1 Main Window

Session 1, use the pre-defined function:

  1. After started, main window of DaCalc looks like figure 1.
  2. Click the menu button on your phone, an option menu will pop-up.
  3. Click the “Load” menu item, it will switch to the “expression load” window. There is a default expression name tips.
  4. Short click the function “tips“, DaCalc will switch to the main window after the function loaded. The expression for “tips” is “cost * 0.2“. Variable “cost” is added to the spinner.
  5. Input value for the variable “cost“, then click “=” on the panel to calculate the result.

Session 2, define your own function:

  1. Click the menu button on your phone when the main window is displaying.
  2. Click the “Edit” menu item, it will switch to the “composing” window.
  3. In put cost * 0.2 / person.
  4. Click the “Save” button. If you input an invalid expression, there will pop-up a text message. But the verifier is very week, so you should ensure that your input is a correct expression.
  5. If the expression is correct, a dialog will pop-up. You must input a name for the function/expression, like “tips-per“.
  6. Click “Okay“, the function will be saved to database. You can click “Load” button to check.
  7. Click “Back” button to switch to the main window.
  8. Now, click the “Load” menu item and click on the “tips-per” function to load.
  9. Input a value for the variable “cost“, then press “=“, the spinner will swith to the next variable “person“.
  10. Input a value for the variable “person” to calculate the result.

If you encounter any problem when using DaCalc, please do not hasitate to send me a email, with your expressions.

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