MathInterpreter

Simple interpreter for mathematical expressions written in C++

Declare a function

f(x, y) = x * y + 2

Declare a variable

n = 3

Undefined values

Every identifier is undefined by default and get's it's value from user declarations.

Literals

34.123, .123, 54 - number
false, true - boolean
undefined

Supported operations

a &[&] b - and between two booleans
a |[|] b - or between two booleans
!a - negation before a boolean

a + b - addition between two numbers
a - b - subtraction between two numbers
a * b - multiplication between two numbers
a / b - division between two numbers
a % b - modulo between two numbers
a ^ b - exponentiation between two numbers
+a - unary plus before a number
-a - unary minus before a number

() - parantheses to denote precedence
f(x, y) - function call

Function calls

User functions can be called with any number of parameters. Not supplied values become undefined and the excess is ignored. This can be used to implement a JavaScript like function overloading like such:

f(x, y) = x + (y != undefined : y : 5) + 2

Built in functions

The language comes with the following built in functions:

sin(x)
cos(x)
tan(x)
asin(x)
acos(x)
atan(x)
atan2(x, y)
sqrt(x)

Their parameters must always be supplied, contrary to user functions, and must all be numbers.

Built in constants

The two built in constants are PI and E.