Reverse Polish Notation Calculator
==================================

   The first example is that of a simple double-precision "reverse
polish notation" calculator (a calculator using postfix operators).
This example provides a good starting point, since operator precedence
is not an issue.  The second example will illustrate how operator
precedence is handled.

   The source code for this calculator is named `rpcalc.y'.  The `.y'
extension is a convention used for Bison input files.

Menu

Decls: Rpcalc Decls

Bison and C declarations for rpcalc.

Rules: Rpcalc Rules

Grammar Rules for rpcalc, with explanation.

Lexer: Rpcalc Lexer

The lexical analyzer.

Main: Rpcalc Main

The controlling function.

Error: Rpcalc Error

The error reporting function.

Gen: Rpcalc Gen

Running Bison on the grammar file.

Comp: Rpcalc Compile

Run the C compiler on the output code.