A minimal countdown app. Companion code to Chapter 10 of the Modern Fortran book.
git clone https://github.com/modern-fortran/countdown
cd countdown
make
How to use:
./countdown
STOP Usage: countdown YEAR MONTH DAY
Example:
./countdown 2020 12 10
290 days, 21 hours, 24 minutes, and 7 seconds remaining until your Birthday!