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Test Cases: Optional AND Input and Output Handling

Posted 10-10-2021 at 11:52 PM by astrogeek
Updated 10-11-2021 at 12:10 AM by astrogeek

This post is part of the Alphanumeric Calculator program group.

Test cases to validate handling of optional "and" in english numeric expressions.

Use of "and" in input stream is always optional. For example, either of these basic forms is allowed:

Code:

one thousand one hundred one
one thousand one hundred and one

By default output follows input usage per expression - if "and" appears in the...

astrogeek

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Posted in Alphanumeric Calculator, Tutorials and Templates

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Test Cases: Multi-line Input

Posted 10-10-2021 at 11:52 PM by astrogeek

This post is part of the Alphanumeric Calculator program group.

Test cases to validate multi-line input expressions.

By design a single expression is terminated by a line break. But you may enter expressions which span multiple lines by escaping the line break with a backslash as the last character before the line break similar to the usage in C preprocessor macro definitions, among others.

Test cases input file:

Code:

cat tests_multiline

...

astrogeek

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Alphanumeric Calculator: GNU Bison Specification

Posted 10-01-2021 at 07:34 PM by astrogeek
Updated 10-07-2021 at 01:34 PM by astrogeek (Rev. 3 source / typo)

This post is Part 4 of the Alphanumeric Calculator program group.

Note: This is Rev. 3 Bison version and requires Rev. 3 Flex version.

Copy the code below into a file named alphacalc.y in your local build directory for this project, the same directory where Makefile and alphacalc.l are located.

I wrote this version using GNU Bison 3.7.6 and gcc 10.3 on a Slackware -current platform, but it should work using any not-too-old Bison with one small change...

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Alphanumeric Calculator: Flex Specification

Posted 10-01-2021 at 07:29 PM by astrogeek
Updated 10-07-2021 at 01:47 AM by astrogeek (Rev. 3 source)

This post is Part 3 of the Alphanumeric Calculator program group.

Note: This is Rev. 3 version and works with Rev. 3 Bison specification.

Copy the code below into a file named alphacalc.l in your build directory for this project where Makefile and alphacalc.y are located.

This is the specification file for a Flex generated lexical analyzer, also called a lexer or scanner.

A brief description of the file contents follows, but if you are...

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Alphanumeric Calculator: Makefile

Posted 10-01-2021 at 07:29 PM by astrogeek
Updated 10-03-2021 at 12:45 PM by astrogeek (meh... tpoys)

This post is Part 2 of the Alphanumeric Calculator program group.

Copy the code below into a file named Makefile in your local build directory for this project, the same directory where alphacalc.l and alphacalc.y are located.

Read and follow comment about TABs at top of the file.

I have it configured to build with gcc and -std=c17, although this project does not use any features specific to the c17 standard. If you use a different compiler or an older gcc...

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