finish Annalyn's Infiltration

Author: Callaghan-Hattingh

c/hello-world/HELP.md

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+# Help
+
+## Running the tests
+
+Get the first test compiling, linking and passing by following the [three rules of test-driven development][3-tdd-rules].
+
+The included makefile can be used to create and run the tests using the `test` task.
+
+```console
+$ make test
+```
+
+Create just the functions you need to satisfy any compiler errors and get the test to fail.
+Then write just enough code to get the test to pass.
+Once you've done that, move onto the next test.
+
+As you progress through the tests, take the time to refactor your implementation for readability and expressiveness and then go on to the next test.
+
+Try to use standard C99 facilities in preference to writing your own low-level algorithms or facilities by hand.
+
+## Checking for memory leaks
+
+The makefile comes also with a build that checks some common mistakes regarding memory leaks and out of bound access to arrays.
+To run these checks, use the following at the command line:
+
+```console
+$ make memcheck
+```
+
+[3-tdd-rules]: https://blog.cleancoder.com/uncle-bob/2014/12/17/TheCyclesOfTDD.html
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit hello_world.c hello_world.h` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [C track's documentation](https://exercism.org/docs/tracks/c)
+- The [C track's programming category on the forum](https://forum.exercism.org/c/programming/c)
+- [Exercism's programming category on the forum](https://forum.exercism.org/c/programming/5)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+Make sure you have read the [C track-specific documentation][c-track] on the Exercism site.
+This covers the basic information on setting up the development environment expected by the exercises.
+
+## Submitting Incomplete Solutions
+
+If you are struggling with a particular exercise, it is possible to submit an incomplete solution so you can see how others have completed the exercise.
+
+## Resources
+
+To get help if having trouble, you can use the following resources:
+
+- [StackOverflow][] can be used to search for your problem and see if it has been answered already. You can also ask and answer questions.
+- [CPPReference][] can be used to look up information on C concepts, operators, types, standard library functions and more.
+- [TutorialsPoint][] has similar content as CPPReference in its C programming section.
+- [The C Programming][K&R] book by K&R is the original source of the language and is still useful today.
+
+[c-track]: https://exercism.org/docs/tracks/c
+[stackoverflow]: http://stackoverflow.com/questions/tagged/c
+[cppreference]: https://en.cppreference.com/w/c
+[tutorialspoint]: https://www.tutorialspoint.com/cprogramming/
+[K&R]: https://www.amazon.com/Programming-Language-2nd-Brian-Kernighan/dp/0131103628/

c/hello-world/README.md

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+# Hello World
+
+Welcome to Hello World on Exercism's C Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+The classical introductory exercise.
+Just say "Hello, World!".
+
+["Hello, World!"][hello-world] is the traditional first program for beginning programming in a new language or environment.
+
+The objectives are simple:
+
+- Modify the provided code so that it produces the string "Hello, World!".
+- Run the test suite and make sure that it succeeds.
+- Submit your solution and check it at the website.
+
+If everything goes well, you will be ready to fetch your first real exercise.
+
+[hello-world]: https://en.wikipedia.org/wiki/%22Hello,_world!%22_program
+
+## Source
+
+### Created by
+
+- @JacobMikkelsen
+
+### Contributed to by
+
+- @bcc32
+- @benkelaar
+- @gea-migration
+- @h-3-0
+- @kytrinyx
+- @patricksjackson
+- @QLaille
+- @RealBarrettBrown
+- @ryanplusplus
+- @siebenschlaefer
+- @wolf99
+
+### Based on
+
+This is an exercise to introduce users to using Exercism - https://en.wikipedia.org/wiki/%22Hello,_world!%22_program

c/hello-world/hello_world.c

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+#include "hello_world.h"
+
+// Define the function itself.
+const char *hello(void)
+{
+   return "Goodbye, Mars!";
+}

c/hello-world/hello_world.h

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+// This is called an include guard, which ensures that the header is only
+// included once. You could alternatively use '#pragma once'. See
+// https://en.wikipedia.org/wiki/Include_guard.
+#ifndef HELLO_WORLD_H
+#define HELLO_WORLD_H
+
+// Declare the 'hello()' function, which takes no arguments and returns a
+// 'const char *', i.e. a pointer to a character (in this case the first
+// character in a string). The function itself is defined in the hello_world.c
+// source file. Ths function is called by the test case(s) in the test source
+// file test/test_hello_world.c.
+const char *hello(void);
+
+#endif

c/hello-world/makefile

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+### If you wish to use extra libraries (math.h for instance),
+### add their flags here (-lm in our case) in the "LIBS" variable.
+
+LIBS = -lm
+
+###
+CFLAGS  = -std=c99
+CFLAGS += -g
+CFLAGS += -Wall
+CFLAGS += -Wextra
+CFLAGS += -pedantic
+CFLAGS += -Werror
+CFLAGS += -Wmissing-declarations
+CFLAGS += -DUNITY_SUPPORT_64 -DUNITY_OUTPUT_COLOR
+
+ASANFLAGS  = -fsanitize=address
+ASANFLAGS += -fno-common
+ASANFLAGS += -fno-omit-frame-pointer
+
+.PHONY: test
+test: tests.out
+	@./tests.out
+
+.PHONY: memcheck
+memcheck: ./*.c ./*.h
+	@echo Compiling $@
+	@$(CC) $(ASANFLAGS) $(CFLAGS) test-framework/unity.c ./*.c -o memcheck.out $(LIBS)
+	@./memcheck.out
+	@echo "Memory check passed"
+
+.PHONY: clean
+clean:
+	rm -rf *.o *.out *.out.dSYM
+
+tests.out: ./*.c ./*.h
+	@echo Compiling $@
+	@$(CC) $(CFLAGS) test-framework/unity.c ./*.c -o tests.out $(LIBS)