diff --git a/8086_assembly_01/Makefile b/8086_assembly_01/Makefile
index 46770a1..da3c746 100644
--- a/8086_assembly_01/Makefile
+++ b/8086_assembly_01/Makefile
@@ -1,2 +1,2 @@
 all:
-	clang++ -g dasm.cpp -o dasm
+	clang++ -g dasm.cc -o dasm
diff --git a/8086_assembly_01/dasm.cpp b/8086_assembly_01/dasm.cc
similarity index 100%
rename from 8086_assembly_01/dasm.cpp
rename to 8086_assembly_01/dasm.cc
diff --git a/8086_assembly_02/Makefile b/8086_assembly_02/Makefile
index 46770a1..da3c746 100644
--- a/8086_assembly_02/Makefile
+++ b/8086_assembly_02/Makefile
@@ -1,2 +1,2 @@
 all:
-	clang++ -g dasm.cpp -o dasm
+	clang++ -g dasm.cc -o dasm
diff --git a/8086_assembly_02/dasm.cpp b/8086_assembly_02/dasm.cc
similarity index 100%
rename from 8086_assembly_02/dasm.cpp
rename to 8086_assembly_02/dasm.cc
diff --git a/8086_assembly_03/Makefile b/8086_assembly_03/Makefile
index 46770a1..da3c746 100644
--- a/8086_assembly_03/Makefile
+++ b/8086_assembly_03/Makefile
@@ -1,2 +1,2 @@
 all:
-	clang++ -g dasm.cpp -o dasm
+	clang++ -g dasm.cc -o dasm
diff --git a/8086_assembly_03/dasm.cpp b/8086_assembly_03/dasm.cc
similarity index 100%
rename from 8086_assembly_03/dasm.cpp
rename to 8086_assembly_03/dasm.cc
diff --git a/8086_sim/Makefile b/8086_sim/Makefile
index e9addcf..1dbfc43 100644
--- a/8086_sim/Makefile
+++ b/8086_sim/Makefile
@@ -1,7 +1,7 @@
 CC=clang++
 CFLAGS=-g -O0 -Wall -Wextra
 LIBS=-Wl,-rpath,./lib -L./lib -lsim86
-SRC=*.cpp
+SRC=*.cc
 OUT=sim86
 
 all:
diff --git a/8086_sim/flag_access.cpp b/8086_sim/flag_access.cc
similarity index 100%
rename from 8086_sim/flag_access.cpp
rename to 8086_sim/flag_access.cc
diff --git a/8086_sim/reg_access.cpp b/8086_sim/reg_access.cc
similarity index 100%
rename from 8086_sim/reg_access.cpp
rename to 8086_sim/reg_access.cc
diff --git a/8086_sim/sim86.cpp b/8086_sim/sim86.cc
similarity index 100%
rename from 8086_sim/sim86.cpp
rename to 8086_sim/sim86.cc
diff --git a/haversine_01/Makefile b/haversine_01/Makefile
index c21fb37..80a7d60 100644
--- a/haversine_01/Makefile
+++ b/haversine_01/Makefile
@@ -1,17 +1,17 @@
 mk_haversine_fscanf:
-	clang++ -g cpp/fscanf.cpp cpp/haversine.cpp -o cpp/haverscan
+	clang++ -g cpp/fscanf.cc cpp/haversine.cc -o cpp/haverscan
 
 run_haversine_fscanf:
 	cd ./cpp && ./haverscan
 
 mk_haversine_strtok:
-	clang++ -g cpp/strtok.cpp cpp/haversine.cpp -o cpp/haverstrtok
+	clang++ -g cpp/strtok.cc cpp/haversine.cc -o cpp/haverstrtok
 
 run_haversine_strtok:
 	cd ./cpp && ./haverstrtok
 
 mk_test:
-	clang++ -g -lpthread cpp/test.cpp cpp/haversine.cpp -o cpp/test
+	clang++ -g -lpthread cpp/test.cc cpp/haversine.cc -o cpp/test
 
 run_test:
 	cd ./cpp && ./test
diff --git a/haversine_01/cpp/fscanf.cpp b/haversine_01/cpp/fscanf.cc
similarity index 100%
rename from haversine_01/cpp/fscanf.cpp
rename to haversine_01/cpp/fscanf.cc
diff --git a/haversine_01/cpp/haversine.cpp b/haversine_01/cpp/haversine.cc
similarity index 100%
rename from haversine_01/cpp/haversine.cpp
rename to haversine_01/cpp/haversine.cc
diff --git a/haversine_01/cpp/strtok.cpp b/haversine_01/cpp/strtok.cc
similarity index 100%
rename from haversine_01/cpp/strtok.cpp
rename to haversine_01/cpp/strtok.cc
diff --git a/haversine_02/compile b/haversine_02/compile
index d0c65d0..5447156 100755
--- a/haversine_02/compile
+++ b/haversine_02/compile
@@ -43,11 +43,11 @@ fi
 
 
 # GENERATOR
-GENSRC="./src/generator/gen_argparser.cpp \
-	./src/generator/generator.cpp \
-	./src/haversine.cpp \
-	./src/point_types.cpp \
-	./src/generator/main.cpp"
+GENSRC="./src/generator/gen_argparser.cc \
+	./src/generator/generator.cc \
+	./src/haversine.cc \
+	./src/point_types.cc \
+	./src/generator/main.cc"
 GENOUT=genhavr
 
 (set -x ; $CXX $CFLAGS $GENSRC -o $GENOUT)
@@ -64,10 +64,10 @@ JSONFLAGS="-c "
 JSON_BUILD_DIR=json_build
 
 PROCSRC="./$JSON_BUILD_DIR/*.o \
-	./src/haversine.cpp \
-	./src/point_types.cpp \
-	./src/processor/proc_argparser.cpp \
-	./src/processor/main.cpp "
+	./src/haversine.cc \
+	./src/point_types.cc \
+	./src/processor/proc_argparser.cc \
+	./src/processor/main.cc "
 PROCOUT=prochavr
 
 # MEMTESTER
@@ -113,7 +113,7 @@ if [[ $BASIC_PROFILING == true ]] || [[ $FULL_PROFILING == true ]]; then
 	cd ../
 
 	# REPETITION TESTING
-	REPTESTSRC="./src/repetition_testing/*.cpp ./$PROF_BUILD_DIR/*.o $ASM_LIB"
+	REPTESTSRC="./src/repetition_testing/*.cc ./$PROF_BUILD_DIR/*.o $ASM_LIB"
 	REPTESTOUT=reptest
 
 	(set -x ; $CXX $CFLAGS $REPTESTFLAGS $REPTESTSRC -o $REPTESTOUT)
diff --git a/haversine_02/src/generator/gen_argparser.cpp b/haversine_02/src/generator/gen_argparser.cc
similarity index 100%
rename from haversine_02/src/generator/gen_argparser.cpp
rename to haversine_02/src/generator/gen_argparser.cc
diff --git a/haversine_02/src/generator/generator.cpp b/haversine_02/src/generator/generator.cc
similarity index 100%
rename from haversine_02/src/generator/generator.cpp
rename to haversine_02/src/generator/generator.cc
diff --git a/haversine_02/src/generator/main.cpp b/haversine_02/src/generator/main.cc
similarity index 100%
rename from haversine_02/src/generator/main.cpp
rename to haversine_02/src/generator/main.cc
diff --git a/haversine_02/src/haversine.cpp b/haversine_02/src/haversine.cc
similarity index 100%
rename from haversine_02/src/haversine.cpp
rename to haversine_02/src/haversine.cc
diff --git a/haversine_02/src/point_types.cpp b/haversine_02/src/point_types.cc
similarity index 100%
rename from haversine_02/src/point_types.cpp
rename to haversine_02/src/point_types.cc
diff --git a/haversine_02/src/processor/main.cpp b/haversine_02/src/processor/main.cc
similarity index 100%
rename from haversine_02/src/processor/main.cpp
rename to haversine_02/src/processor/main.cc
diff --git a/haversine_02/src/processor/proc_argparser.cpp b/haversine_02/src/processor/proc_argparser.cc
similarity index 100%
rename from haversine_02/src/processor/proc_argparser.cpp
rename to haversine_02/src/processor/proc_argparser.cc
diff --git a/haversine_02/src/repetition_testing/main.cpp b/haversine_02/src/repetition_testing/main.cc
similarity index 100%
rename from haversine_02/src/repetition_testing/main.cpp
rename to haversine_02/src/repetition_testing/main.cc
diff --git a/haversine_02/src/repetition_testing/reptester.cpp b/haversine_02/src/repetition_testing/reptester.cc
similarity index 100%
rename from haversine_02/src/repetition_testing/reptester.cpp
rename to haversine_02/src/repetition_testing/reptester.cc