Advent of Code 2018

Solutions for Advent of Code 2018 in C++17.

The solution with the highest number is always a "work in progress".

Requirements

• g++ (GCC) or clang++ (Clang) with support for C++17.
• sakemake

Building and running

Enter the desired day and part:

cd d1p1

Then build and run:

sm run

Alternatively, something like this may work:

g++ -std=c++17 -O2 -DDATADIR=\"data/\" -I../include ../common/numbers.cpp ../common/turtle.cpp main.cpp -o d1p1 && ./d1p1

Workflow for new challenges

1. Create a directory for the challenge in question, for day 4 part 2 create a directory named d4p2.
2. Create main.cpp from scratch, or copy it from a previous challenge.
3. If the challenge comes with one or more data files, place them in a directory named data inside the d4p2 directory.
4. When reading files from within main.cpp refer to the DATADIR define, with a space before the filename string. For example: openFile(DATADIR "input.txt"s);. openFile and input.txt are made-up names. The string literal "s is optional.
5. See if any of the functions available in ../common may be applicable for solving the current challenge. Browsing the headers in ../include may give a better overview (and have more informative comments).
6. If needed, add a function to ../include and ../common by first adding the function signature and/or header-only functions in a header file in ../include and then adding the implementation in a .cpp file with the same first name in ../common. Add a test-cpp file in ../common by naming it the first name of the file then _test.cpp, so that the test file for bananas.cpp is bananas_test.cpp. Follow the pattern of the other *_test.cpp files. sm test can be used for running tests in a directory with _test.cpp files.
7. Solve the challenge. Adding common functions and classes, with tests that make sure they work correctly, is helpful.
8. The sm command can be used for building and sm run can be used for building and running. sm rebuild rebuilds. There is also support for profiling and debug builds. See the sakemake webpage for more information.
9. Generating project files for QtCreator with sm pro, then opening it in qtcreator, can be useful for debugging.
10. sm fmt can be used for formatting the source code. QtCreator can also be configured to ie. format all C++ code with the clang-format style of WebKit, with 99 character long lines.

General info

• License: MIT