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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
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.
- 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.
- Ideas for improving the multi-function calculator.
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