2 Examples

Now we show and explain several sample programs written using Bison: a reverse polish notation calculator, an algebraic (infix) notation calculator — later extended to track “locations” — and a multi-function calculator. All produce usable, though limited, interactive desk-top calculators.

These examples are simple, but Bison grammars for real programming languages are written the same way. You can copy these examples into a source file to try them.

2.1 Reverse Polish Notation Calculator		Reverse polish notation calculator; a first example with no operator precedence.
2.2 Infix Notation Calculator: `calc`		Infix (algebraic) notation calculator. Operator precedence is introduced.
2.3 Simple Error Recovery		Continuing after syntax errors.
2.4 Location Tracking Calculator: `ltcalc`		Demonstrating the use of @`n` and @$.
2.5 Multi-Function Calculator: `mfcalc`		Calculator with memory and trig functions. It uses multiple data-types for semantic values.
2.6 Exercises		Ideas for improving the multi-function calculator.

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