SpeedCrunch is a simple but powerful calculator.

Among its features are:
- high precision, up to 50 decimal digits
- to be enjoyed using keyboard
- result shown in scrollable window
- history of last expressions (use up and down arrow)
- built-in functions: abs, sqrt, pi, log, exp, ln, sin, cos, tan, sinh,
  cosh, tanh, asin, acos, atan, arsinh, arcosh, artanh
- postfix operator ! lets you compute factorials
- support for variables, e.g try x=pi/3 and then sin(x)
- special variable ans holds the last calculation result
- percent operator, try e.g. 45%*75 or price/80%
- angle mode: Alt+D for degrees, Alt+R for radians
- automatic parentheses closing, e.g. cos(pi/4 becomes cos(pi/4)


Using SpeedCrunch
------------------

SpeedCrunch is easy to use, just type the expression that you want to calculate
and press Enter. Result is shown in the scrollable display. And, you can quickly
copy the last calculation result to the clipboard using Ctrl+R.

If you want to reuse again the expression which you typed before, then press up
and down arrow to access the expression history.

Beside standard algebraic operators like + (addition), - (substraction),
* (multiplication), * (division), ^ or ** (power), there is support for some
functions, for example sin, log, abs, and many more. You do not need to memorize
function names, use Ctrl+F to pop up a dialog where you can choose the function
that you need. Or take advantage of auto-completion feature, for example type s
only and in less than a second you will be automagically given with choices of
sin, sinh, and sqrt.

Advanced calculation sometimes needs memory feature. SpeedCrunch allows a
variable to hold calculation result. Using assignment, such as x=0.3 means that
variable named x has the value of 0.3, which you can always later on, for
example sin(x). You can define as many variables as you want. When you want to
use a variable but you can not recall its exact name, use Ctrl+I to show a list
of variables that you can pick easily.

There is a special variable, ans, which always holds the last calculation
result. Another variable pi holds one of the most important constant in
math world.

Your expression history (maximum last 100 expressions), as well as variables
you have defined, are saved between sessions. This means, you can still recall
those calculations you have done yesterday or last week.

Often, SpeedCrunch can still understand an incomplete expression. For example,
just typing sin followed by Enter - likely means taking the sine of last value
- is automatically translated as sin(ans). Also, for such function you may skip
the parentheses if you pass simple number or variable, sin 0.1 is as valid as
sin(0.1). Speaking about parentheses, closing them can be left to SpeedCrunch,
e.g. cos(pi/4 is automatically corrected to cos(pi/4).

For your convenience, it is even possible to customize the font and color used
for the display.

Keyboard Shortcuts
------------------
Up/Down   recall last expression
Ctrl+I    insert variable
Ctrl+F    insert function
Ctrl+R    copy last result to clipboard
Ctrl+S    save current session to text file
Alt+D     degrees mode for trigonometric functions
Alt+R     radians mode for trigonometric functions

官方网站：speedcrunch.org
运行平台：Windows 7/8/10/11；Mac OS X；Linux
界面语言：多国语言（含中文）
官方下载：官方下载页
—— Windows：/SpeedCrunch-0.12-win32.exe；/SpeedCrunch-0.12-win32.zip；
—— MacOS：/SpeedCrunch-0.12.dmg；
—— Linux：32-bit RPM；32-bit Deb；32-bit Generic；64-bit RPM；64-bit Deb；64-bit Generic
网盘搬运：SpeedCrunch-0.12-win32.exe – 蓝奏云 (lanzouq.com)

• 任意精度（最多 100,000,000 位有效数字）
• 复数
• 分数
• 列表、向量、矩阵
• 历史记录（快捷键 Ctrl+Up、Ctrl +Down）
• 计算器可以将所有结果写入日志文件
• 命令 if、goto、print、return
• 变量数量不限
• 常用公式可以另存为宏
• 计算器可以翻译成其他语言

Precise Calculator is a free open source scientific calculator for Windows.Features:

• arbitrary precision (up to 100,000,000 significant digits)
• complex numbers
• fractions
• lists, vectors, matrices
• history (shortcuts ctrl+up, ctrl+down)
• calculator can write all results to a log file
• commands if, goto, print, return
• unlimited number of variables
• frequently used formulas can be saved as macros
• calculator can be translated to other languages

System requirements:

• Intel or AMD processor
• Microsoft Windows operating system (tested on Windows 2000/XP/Vista/7/8/10/11)

官方网站：Precise Calculator – programmable scientific calculator (sourceforge.net)
官方下载：Current version is 2.8
Download Precise Calculator 64-bit – recommended
Download Precise Calculator 32-bit – for older Windows versions
Download command-line calculator – for automated batch scripts
Source code – GitHub project

网盘搬运：preccalc-64bit.zip – 蓝奏云 (lanzouq.com)