This was a class project and took a few days to adequately hash out. It also turned out to be relatively easy and fun - but I didn't want to tell that to the other folks in my comparative languages class who hadn't started on it when I was turning it in.

Description of Grammar / Development Notes

Lexer Class Source
Parser Class Source
Parser Applet Source

Example Expression

Answer

y = 1+2*3^4

y = 163.0

y = (tan(45)*2)/3.22

y = 0.6211180124223601

y = 10 + 4 * ( 2 + 1 ) + 10

y = 32.0

x = aln( ln( sin(90)))

x = 1.0

+

Addition

-

Subtraction

*

Multiplication

/

Division

^

Exponentiation

( ... )

Precedence

sin ( value )

sine function (value in degrees)

cos ( value )

cosine function (value in degrees)

tan ( value )

tangent function (value in degrees)

asin ( value )

arcsine function (value in degrees)

acos ( value )

arccosine function (value in degrees)

atan ( value )

arctangent function (value in degrees)

ln ( value )

natural log function

log ( value )

common log (base 10) function

aln ( value )

anti-natural log function

alog ( value )

anti-common log (base 10) function

PI

Ratio of circumference to diameter of a circle

e

Base of natural log