diff --git a/.gitignore b/.gitignore
index 4433abd..8246e48 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,4 +32,5 @@
 # Debug files
 *.dSYM/
 
-.idea/
\ No newline at end of file
+.idea/
+.vscode/
\ No newline at end of file
diff --git a/21st_century_c/first_compile/Makefile b/21st_century_c/first_compile/Makefile
new file mode 100644
index 0000000..c6175cf
--- /dev/null
+++ b/21st_century_c/first_compile/Makefile
@@ -0,0 +1,12 @@
+.PHONY: clean
+P=erf
+OBJECTS= erf.o
+CFLAGS = -g -Wall -O3
+LDLIBS=''
+CC=gcc
+
+$(P): $(OBJECTS)
+
+
+clean:
+	rm -f *.o $(P)
diff --git a/21st_century_c/first_compile/erf b/21st_century_c/first_compile/erf
deleted file mode 100755
index 8b55a02..0000000
Binary files a/21st_century_c/first_compile/erf and /dev/null differ
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..97e69fa
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,6 @@
+CLEANSUBDIRS ?= types structs static pointers hello headers functions file_io env_vars
+
+cleanall:
+	@for subdir in $(CLEANSUBDIRS); do \
+		(cd $$subdir && $(MAKE) clean) || exit 1; \
+	done
\ No newline at end of file
diff --git a/env_vars/Makefile b/env_vars/Makefile
index 8130219..1c83e8e 100644
--- a/env_vars/Makefile
+++ b/env_vars/Makefile
@@ -1,7 +1,11 @@
-P=
+P=env
 OBJECTS=
 CFLAGS = -g -Wall -O3 
 LDLIBS=
 CC=gcc
 
 $(P): $(OBJECTS)
+
+clean:
+	rm -f *.o $(P)
+	rm -rf env.dSYM/
\ No newline at end of file
diff --git a/env_vars/env b/env_vars/env
deleted file mode 100755
index 015c364..0000000
Binary files a/env_vars/env and /dev/null differ
diff --git a/env_vars/env.c b/env_vars/env.c
index ba94c51..ef0c511 100644
--- a/env_vars/env.c
+++ b/env_vars/env.c
@@ -1,14 +1,18 @@
 #include <stdlib.h> //getenv, atoi
-#include <stdio.h> //printf
+#include <stdio.h>	//printf
 
-int main(){
+int main()
+{
 	// pointer to a char
-	char *repstext=getenv("reps");
+	char *repstext = getenv("reps");
+	// atoi reads in the string and converts it to a integer value.
+	// This is the tenary operator 'condition ? value_if_true : value_if_false'
 	int reps = repstext ? atoi(repstext) : 10;
-	
+
 	char *msg = getenv("msg");
-	if (!msg) msg = "Hello.";
-	
-	for (int i=0; i< reps; i++)
+	if (!msg)
+		msg = "Hello.";
+
+	for (int i = 0; i < reps; i++)
 		printf("%s\n", msg);
 }
diff --git a/file_io/Makefile b/file_io/Makefile
index 7362e1a..d1ee83e 100644
--- a/file_io/Makefile
+++ b/file_io/Makefile
@@ -4,4 +4,4 @@ csv_writer:
 	gcc -o csv_writer csv_writer.c
 
 clean:
-	rm -f csv_writer
+	rm -f csv_writer *.csv
diff --git a/file_io/csv_writer b/file_io/csv_writer
deleted file mode 100755
index b6e6961..0000000
Binary files a/file_io/csv_writer and /dev/null differ
diff --git a/file_io/csv_writer.c b/file_io/csv_writer.c
index 34378b4..dd8d4dc 100644
--- a/file_io/csv_writer.c
+++ b/file_io/csv_writer.c
@@ -4,19 +4,21 @@
 
 #define FILE_EXTENSION ".csv"
 
+int main(int argc, char const *argv[])
+{
 
-int main(int argc, char const *argv[]){
-
-	if (argc <= 1){
+	if (argc <= 1)
+	{
 		fprintf(stderr, "Failed to provide a csv file\n");
 		exit(1);
 	}
 
 	size_t file_len = strlen(argv[1]);
-	
+
 	/*char pointer of*/
-	char * FILE_NAME = malloc(file_len + 1);
-	if (FILE_NAME == NULL){
+	char *FILE_NAME = malloc(file_len + 1);
+	if (FILE_NAME == NULL)
+	{
 		fprintf(stderr, "Failed to allocate memory for file name!");
 		exit(1);
 	}
@@ -25,7 +27,8 @@ int main(int argc, char const *argv[]){
 	strcpy(FILE_NAME, argv[1]);
 
 	/*Returns a pointer to the location the substring if found*/
-	if (strstr(FILE_NAME, FILE_EXTENSION) == NULL ){
+	if (strstr(FILE_NAME, FILE_EXTENSION) == NULL)
+	{
 		fprintf(stderr, "What the fuck are you doing? That %s isn't a csv file!\n", FILE_NAME);
 		free(FILE_NAME);
 		FILE_NAME = 0;
@@ -35,9 +38,9 @@ int main(int argc, char const *argv[]){
 	char name[128], phone_number[13];
 	// puts(FILE_NAME);
 	FILE *_target_file = fopen(FILE_NAME, "a");
-	if (_target_file == NULL){
+	if (_target_file == NULL)
+	{
 		exit(1);
-
 	}
 
 	puts("Name: ");
@@ -46,7 +49,7 @@ int main(int argc, char const *argv[]){
 	scanf("%s", phone_number);
 
 	printf("Appending %s and %s to %s", name, phone_number, FILE_NAME);
-	fprintf(_target_file,"%s,%s\n", name, phone_number);
+	fprintf(_target_file, "%s,%s\n", name, phone_number);
 	fclose(_target_file);
 	/*clean up*/
 	free(FILE_NAME);
diff --git a/file_io/dirp.csv b/file_io/dirp.csv
deleted file mode 100644
index 75cadf7..0000000
--- a/file_io/dirp.csv
+++ /dev/null
@@ -1 +0,0 @@
-Margot,517-775-7040
diff --git a/functions/Makefile b/functions/Makefile
new file mode 100644
index 0000000..6c82572
--- /dev/null
+++ b/functions/Makefile
@@ -0,0 +1,12 @@
+.PHONY: clean
+P=cube
+OBJECTS= cube.o
+CFLAGS = -g -Wall -O3
+LDLIBS=''
+CC=gcc
+
+$(P): $(OBJECTS)
+
+
+clean:
+	rm -f *.o $(P)
diff --git a/headers/temp_count b/headers/temp_count
deleted file mode 100755
index f6560b5..0000000
Binary files a/headers/temp_count and /dev/null differ
diff --git a/pointers/Makefile b/pointers/Makefile
index 1e3c385..c65b1e3 100644
--- a/pointers/Makefile
+++ b/pointers/Makefile
@@ -1,5 +1,5 @@
 CFLAGS=-Wall -O3
-PROGRAMS=simple_pointer adv_pointer
+PROGRAMS=simple_pointer adv_pointer char_pointer
 
 all: $(PROGRAMS)
 
@@ -9,6 +9,9 @@ simple_pointer:
 adv_pointer:
 	gcc -o adv_pointer $(CFLAGS) adv_pointer.c
 
+char_pointer:
+	gcc -o char_pointer $(CFLAGS) char_pointer.c
+
 # NOT IMPLEMENTED
 #array_pointer:
 #	gcc -o array_pointer -Wall -O1 array_pointer.c
diff --git a/pointers/adv_pointer b/pointers/adv_pointer
deleted file mode 100755
index 60ace4b..0000000
Binary files a/pointers/adv_pointer and /dev/null differ
diff --git a/pointers/char_pointer.c b/pointers/char_pointer.c
new file mode 100644
index 0000000..cad4fd6
--- /dev/null
+++ b/pointers/char_pointer.c
@@ -0,0 +1,33 @@
+#include <stdio.h>
+
+#define DOLLARS 0x24;
+
+// Example of function declaration. This is what the preprocessor does with the header files
+void set_to_y(char *p);
+
+int main()
+{
+    char my_char = 'a';
+    char *p_char;
+
+    p_char = &my_char;
+
+    printf("The value of *p_char is set to %c\n", *p_char);
+    set_to_y(p_char);
+
+    printf("Lets check the value of my_char: %c\n", my_char);
+    printf("You, know what I want to just muck with your memory directly\n");
+
+    //derefence the location and just set the byte we want
+    *p_char = DOLLARS;
+    printf("So all your bits now should show my_char as $ DOLLARS. Lets see: %c\n", my_char);
+
+    return 0;
+}
+
+// This is function definition
+void set_to_y(char *p)
+{
+    fprintf(stdout, "Setting the value at address %p from %c to y\n", &p, *p);
+    *p = 'y';
+}
\ No newline at end of file
diff --git a/pointers/simple_pointer b/pointers/simple_pointer
deleted file mode 100755
index d09d3f3..0000000
Binary files a/pointers/simple_pointer and /dev/null differ
diff --git a/static/eggs b/static/eggs
deleted file mode 100755
index c04439b..0000000
Binary files a/static/eggs and /dev/null differ
diff --git a/structs/pixel b/structs/pixel
deleted file mode 100755
index f7341f1..0000000
Binary files a/structs/pixel and /dev/null differ
diff --git a/structs/struct2 b/structs/struct2
deleted file mode 100755
index 453e56b..0000000
Binary files a/structs/struct2 and /dev/null differ
diff --git a/types/Makefile b/types/Makefile
new file mode 100644
index 0000000..f910a7c
--- /dev/null
+++ b/types/Makefile
@@ -0,0 +1,12 @@
+.PHONY: clean
+P=types
+OBJECTS= types.o
+CFLAGS = -g -Wall -O3
+LDLIBS=''
+CC=gcc
+
+$(P): $(OBJECTS)
+
+
+clean:
+	rm -f *.o $(P)
diff --git a/types/types.c b/types/types.c
index f6bf39e..77fb24f 100644
--- a/types/types.c
+++ b/types/types.c
@@ -3,8 +3,6 @@
 //Type definition
 typedef unsigned char byte;
 
-
-
 int main(int argc, char const *argv[])
 {
 	int i = 123;
@@ -14,11 +12,11 @@ int main(int argc, char const *argv[])
 
 	//variations
 	unsigned int ui = 123u;
-	
+
 	//short and long provide different storage depending on the compiler and platform
 	//Regular int usually maps to the natural size of a word on a particular machine
 	// Ex: on a 32 bit machine int == 32 bits  short == 16 bits and long == 64 bits ...or 32
-	short int si = 123; 
+	short int si = 123;
 	long int li = 123;
 
 	//short hand declaration of short and long
@@ -30,7 +28,7 @@ int main(int argc, char const *argv[])
 
 	//we have to cast the result of sizeof because it returns a value whose size is large enough
 	//to hold a pointer value, but the fundamental types will never be that big so we cast
-	printf("The value of i: %d (%d) bytes\n", i, (int) sizeof(int));
+	printf("The value of i: %d (%d) bytes\n", i, (int)sizeof(int));
 	//this will tell us that int is 4 bytes and running in a 32 bit address space
 
 	return 0;