Linux integer output

Here are some source files written in GNU assembly. The resulting executeable outputs an integer to the terminal.

The files are taken from the book Programming from the ground up written by Jonathan Bartlet.

Building a test program

To build a test program that prints the number of 824 to the terminal, follow the following steps:

as --32 -g write_newline.s -o write_newline.o
as --32 -g count_chars.s -o count_chars.o
as --32 -g integer_to_string.s -o integer_to_string.o
as --32 -g conversion_program.s -o conversion_program.o
ld -m elf_i386 integer_to_string.o count_chars.o write_newline.o conversion_program.o -o conversion_program

To run the program, write ./conversion_program on the terminal.

Print the multiples of 3 and 5 between 0 and 512 and their sum

as --32 -g write_newline.s -o write_newline.o
as --32 -g count_chars.s -o count_chars.o
as --32 -g integer_to_string.s -o integer_to_string.o
as --32 -g conversion_program.s -o conversion_program.o
as --32 -g print_inreger.s -o print_integer.o
as --32 -g print_multiples.s -o print_multiples.o
ld -m elf_i386 integer_to_string.o count_chars.o write_newline.o print_integer.o print_multiples -o multiple

To run the program, write ./multiple on the terminel. The printed sum of the multiples should be 60945.

Verification of the result

>>> sum = (3 * 170 * 171 + 5 * 102 * 103 - 15 * 34 * 35) / 2
>>> sum
60945.0