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Examples
********
Now we show and explain three sample programs written using Bison: a
reverse polish notation calculator, an algebraic (infix) notation
calculator, and a multi-function calculator. All three have been tested
under BSD Unix 4.3; each produces a usable, though limited, interactive
desk-top calculator.
These examples are simple, but Bison grammars for real programming
languages are written the same way. You can copy these examples out of
the Info file and into a source file to try them.
* Menu:
* RPN Calc Reverse polish notation calculator;
a first example with no operator precedence.
* Infix Calc Infix (algebraic) notation calculator.
Operator precedence is introduced.
* Simple Error Recovery Continuing after syntax errors.
* Multi-function Calc Calculator with memory and trig functions.
It uses multiple data-types for semantic values.
* Exercises Ideas for improving the multi-function calculator.