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custom cmdline implementation
The below program takes the inputted string from commandline and parses it and calls the corresponding function.
commands are either single word or multiple words.
say for e.g.
-#version ...
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Calculator parsing S-expressions
The following program is supposed to be a (command line) calculator that parses expression following syntax similar to Lisp's S-expressions.
Some examples:
$ echo "(+ 5 5)" | ./a.out
...