Yard/test.erpn

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extern function say_hello
extern function print
extern function println
extern function readline
extern function to_rat
extern function to_int
extern function parse_int
extern function parse_rat
extern function cos
extern function pow
extern function sin
extern function tan
extern function ln
extern function sqrt
fac:
Load Arg x
Load Int 2
Gt Num(Int)
Unless
Load Int 1
Yield
Load Arg x
Load Int 1
Sub Int
Call fac
Load Arg x
Load Int 2
Sub Int
Call fac
Add Int
main:
Load Int 24
Call fac
Store Int c
Load String "factorial: "
Load Var c
Cat Str
Call println
Load Int 0