leap-year

This small software just checks whether a given year is a leap year. I created it just for assembly x86 logical practical.

Intro

I trick a way to convert 4 bytes string input, which are contiguous hex ASCII codes put together.

Most tutorial out there just use 1 byte input ASCII number in assembly x86, but, since a year number is 4 bytes length, I had solve it by myself.

P.s: Yeah, I know I could use some C libs along; or Assembly libs (e.g Irvine, Along32), but I was interested to work on asm code ONLY on this project.

Prerequisites (...which are what I used. You mighty use whatever you wanto thought)

• Gnu/Linux ( at least that is the OS I've used here )
• nasm
• ld (from binutils. It's already buit-in Gnu/Linux, however you can also use it in Windows by use MinGw framework or Cygwin)

How to build it

Once inside the project folder:

nasm -felf64 src.asm -o prog.o

ld prog.o -o prog.elf

or ... if your GNU/Linux owns the "make" tool --- most distro does --- just type:

make

How to run it

./prog.elf

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Some suggestions ? Please, let me know ;-)

Bye !