Stack-based+
Stack-based+ is a derivative of Stack-based, its goal is to make progrmming in Stack-based easier.
Procedures
Programs in Stack-based+ are separated into subprograms called procedures. Two procedures are separated by exactly one blank line.
For example:
VAR a VAR b
has two procedures but:
VAR a VAR b
has three.
By default, when procedure terminates, control flow goes to the next procedure.
Procedures makes coding more logical, it is convenient but not needed for one to write a comment for each procedure for what it does.
Jumps
Stack-based+ removes JA and JB, but there are two other commands for jumping: J and NJ.
J x integer
Jump to the integer-th procedure if x is nonzero.
NJ x integer
Jump to the integer-th procedure if x is zero.
Examples
Hello World
P "Hello World!"
Cat program
VAR c IC c OC c J c 2
Stack-based improved
Stack-based improved or Stack-based++ is an improved version of Stack-based. It adds another feature: labels.
Commands
L "string"
Defineds a label named string
JL "string"
Jump to the string-th label if x is nonzero.
NJL "string"
Jump to the string-th label if x is zero.