67 lines
2.2 KiB
Markdown
67 lines
2.2 KiB
Markdown
# hp
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## Command-line calculator
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This is an *rpn* calclulator with a maximum stack size of 5. It has full support for real and complex numbers
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and will calculate summary statistics for a set of reals of real pairs. Spaces are important since they are used
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to distinguish tokens.
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## Building
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The source code is written in *Fortran*. The only compilers I've found that will build it are *ifort* and *ifx* from Intel's
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OneApi suite. Makefiles are provides for GNU make (Linux) and nmake (Windows).
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```
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hp -h
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Command Calculator
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==================
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Introduction
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------------
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This is a command-line calculator. It supports both real and complex modes, as well
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as degrees/radians selection and precision control. It can be run interactively or as an
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expression parser. This help is deliberately terse to encourage exploration.
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-------------------------------------------------------------------------------
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Operators: + - * / ^ ^/x ^x ^2 ^/2 ^3 ^/3 ^*2 ^*10 || ! %
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Constants: pi e g G c two_pi pi_over_2
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Functions: sin cos tan asin acos atan sinh cosh tanh log2 log lg len sq sqrt cb cbrt
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alog2 alog alog10 gamma ncr npr rem int nint
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Controls: fix[0-9] clx cl cla
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Modes: real complex verbose terse degrees radians
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Memories: n=0...9 st<n> sw<n> rc<n> cl<n> m<n>+ m<n>- m<n>* m<n>/ msh
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Complex: ri _ || to_pol to_cart
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Actions: 1/ -- R r ? > < split drop
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Stats: { x1 x2 ... } { x1,y1 x2,y2 ... }
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n ux sx mx lqx uqx uy sy my lqy uqy a b cov corr
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Quits: q
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-------------------------------------------------------------------------------
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Examples
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--------
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hp "fix2 18 2 - 8 2 / * =" -> 64.00
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hp "2 -- complex sqrt =" -> (0.00000,-1.414214)
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hp -c "radians (1,pi_over_2)p ^ * degrees =" -> (1.000000,180.000000) p
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```
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## Build and Test with FPM
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To build with fpm(1)
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( as described at [Fortran Package Manager](https://github.com/fortran-lang/fpm) )
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enter:
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```bash
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git clone https://github.com/sgeard/hp.git
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cd hp
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fpm test
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fpm run
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```
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or just list it as a dependency in your fpm.toml project file.
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```toml
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[dependencies]
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hp = { git = "https://github.com/sgeard/hp.git" }
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```
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