printf-time

by mezcel 7 years ago

GNU/Linux • xterm-256color • bash 667 views

printf-time

C syntax which calculates Easter day and Paschal Full Moon. (gcc)

github : branch v0.1.1 added a ‘print to file’ feature, GDB notes Dir, and a a help/error feature.

Description:

A C program which uses C syntax and the GCC compiler to calculate the date of the Paschal Full Moon (PMF) and the date of Easter Day.

This app is a C refresher as well as an exercise in using the CLI to debug in GDB. I deliberately omitted the string.h library to force myself to manually perform C string manipulations.

The program is in the C_Source folder.

Feature algorithms:

Gauss Easter Algorithm
Anonymous Easter Algorithm
Meeus Easter Algorithm
Paschal Full Moon (PFM) – primary output

Practical Bash Usecase

## Bash UI

bashVar=$(./main)           ## Store printf output to bash var
lastLine=$(echo "$bashVar" | tail -n1)  ## parse only the last output line
date --date=$lastLine           ## use printf string to generate a Bash date

## Bash generated output

Thu Apr 18 00:00:00 EDT 2019

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