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gbaCalc: Decimal Calculator |
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2008 GBizApps.com All rights reserved. |
Web: gbizapps.com |
Contact: info@gbizapps.com |
Sample Calculations |
Settings |
The operations are displayed in a scrolling window with two columns. The left column shows the operations and operands, the right column shows the result of each operation.
Unlike other calculators, you always enter the operand first and then press the operation key, which will be applied to the current result and the operand just entered. This is similar but not exactly like reverse polish notation (rpn), since one operand is always the current result and the other one is the newly entered value.
If you press any value in the scrolling window, it will be copied to the entry field and you can perform another operation on it without re-entering. This is similar to memory keys, but more flexible.
If you press on the entry field, it will be cleared. If you long-press on it, all the results will be cleared too.
You can navigate through the scrolling window with the trackball or by pressing on a line and moving up or down while pressing.
There are menu options for editing the operations, changing the settings, sending the calculation as an email, writing it on a file and reading it back.The program was designed to use the touch screen only, but you can also use the physical keyboard for most operations, if you keep the ALT-key pressed while pressing an operation key.
+ - / x | These operations are applied to the current result with the value entered. |
= |
If you entered a value, the current result will be set to it. Otherwise the current result will be added to the grand total and reset to zero. |
# | If you entered a value, it will be put in the left column without any operations, just for info. Otherwise the grand total will be displayed. |
% | The percentage of the current result is calculated. If you then press + without an entry, the percentage is added to the previous result. |
%+ | Like %, but based on the inclusive value, where the current result is the exclusive value. If you then press + without an entry, the percentage is added to the previous result giving the inclusive value. Useful for mark-up calculation: you know the cost of goods (100.00), the profit margin (10%) and you want to know the selling price (111.11). |
%- | Like %, but based on the exclusive value, where the current result is the inclusive value. If you then press - without an entry, the percentage is subtracted from the previous result giving the exclusive value. |
TX | If you entered a value, it is taken as the tax rate. Otherwise the tax rate is displayed. |
TX+ | The tax rate is applied to the current result taken as pre-tax value giving the tax-inclusive value. |
TX- | The tax rate is applied to the current result taken as tax-inclusive value giving the pre-tax value. |
CE | The entry field is cleared (same effect as when you touch the entry field) |
C | The entry field and all the results and totals are cleared (same effect as when you long-touch the entry field) |
M1 | Store or retrieve memory value from or to the entry field. |
M2 | Store or retrieve memory value from or to the entry field. |