RealCalc科学计算器使用说明.

====Basic Operation====

===Basic Operation===

The number keys[0]to[9]and decimal point[DP]are used to enter numbers.To enter a negative number,press[SGN]after entering the number.

To enter an exponent,press[EXP]then enter the exponent using the number

and[SGN]keys.

The[DEL]key deletes the last digit entered and can be used to correct a number or exponent.

The[CLR]key clears the display ready for a new calculation.

The[SHIFT]key is used to access the secondary function of each key(displayed above the key in orange.While shift is active,'SHIFT'will be shown on the

display.Press[SHIFT]again to cancel shift mode.

As an alternative to using shift,the secondary function of each key can also be accessed by holding down the key.This feature can be disabled in Settings.

====Display Modes====

===Display Modes===

There are four display modes for calculation e the[FSE]key to cycle through the modes. The display will show'FIX','SCI','ENG'or blank to indicate the current mode.

===Decimal Places===

To set the number of decimal places in FIX,SCI or ENG

modes,press[SHIFT][TAB].This will bring up a dialog to select the number of places from0to9,together with the current value rounded to each. ===Normal mode===

The result is displayed as a normal floating point value if possible.If its magnitude is less than0.0001 or greater than9999999999,then scientific notation is used(see SCI mode below.The number of decimal places cannot be adjusted in this mode.

===FIX mode(Fixed decimal point===

The result is displayed after rounding to the number of decimal places selected

by[SHIFT][TAB].If there is not enough room,the result may be displayed with fewer decimal places.

===SCI mode(Scientific notation===

The result is displayed in the format A x10^B^,with the mantissa(Arounded to the number of decimal places selected by[SHIFT][TAB].

===ENG mode(Engineering notation===

This is the same as SCI mode,except that the exponent is set to a multiple of3.

===Note===

The value used for calculations is the unrounded result stored internally,and not the rounded value shown on the display.

====Result History====

===Result History===

Each time the[EQU]key is pressed,the calculation result is added to a history list.

The[ANS]key presents a dialog showing the calculation result history,with the most recent results at the top.Select the required value to enter it into the calculator.

===History Size===

The maximum number of results which are stored can be set via the Settings screen(Menu->Settings. When set to'Off',the[ANS]key simply recalls the last

result,without showing a dialog.

===Unique History===

By default,the values in the history list are unique.If a calculation result is the same as one already in the history list,this value is moved to the top.This behaviour can be changed via the Settings screen. ===History Reset===

The history list can also be cleared via the Settings screen.

====Memories====

===Main Memory===

The main memory has four dedicated function keys:

~[MS]stores the current display value into the main memory.

~[MR]recalls the value stored in the main memory.

~[MP]adds the current display value to the main memory.

~[MM]subtracts the current display value from the main memory.

Whenever a non-zero value is stored in the main memory,the letter'M'is shown on the display.

The main memory can also be accessed via the[STO]and[RCL]keys(see below.