diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..20fba2b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+# Created by .ignore support plugin (hsz.mobi)
+.idea
+bin
+cmake-build-debug
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..ce38bb3
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 3.3)
+project(Hardwarenahe_Programmierung)
+
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c14")
+SET(CMAKE_BUILD_TYPE Debug)
+
+# These are the corresponding output paths
+set (EXECUTABLE_OUTPUT_PATH ${CMAKE_SOURCE_DIR}/bin)
+set (LIBRARY_OUTPUT_PATH ${EXECUTABLE_OUTPUT_PATH})
+
+add_subdirectory(src/c)
\ No newline at end of file
diff --git a/src/c/CMakeLists.txt b/src/c/CMakeLists.txt
new file mode 100644
index 0000000..84164e2
--- /dev/null
+++ b/src/c/CMakeLists.txt
@@ -0,0 +1 @@
+add_executable(a3 a3.c)
\ No newline at end of file
diff --git a/src/c/a3.c b/src/c/a3.c
new file mode 100644
index 0000000..a61f18f
--- /dev/null
+++ b/src/c/a3.c
@@ -0,0 +1,30 @@
+#include "a3.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+void memdump(unsigned char *string) {
+
+}
+
+
+int memreplace(char *string, char cin, char cout, char **caddr) {
+
+}
+
+int main(int argc, char **argv) {
+    if(argc <= 3) {
+        printf("Not enough arguments");
+        return -1;
+    }
+
+
+    memdump((unsigned char*)argv[1]);
+    char **lastAddress;
+    int count = memreplace(argv[1], *argv[2], *argv[3], 0);
+
+    printf("Laenge der Zeichenkette (inkl \\0): %i Bytes\n", sizeof(argv[1]));
+    printf("Ersetzen: '%c' mit '%c'\n", *argv[2], *argv[3]);
+    printf("Suchzeichen wurde %i mal gefunden und ersetzt\n", count);
+    printf("zuletzt an Addresse 0x%lx \n", (unsigned long) (&lastAddress));
+    memdump((unsigned char*)argv[1]);
+}
\ No newline at end of file
diff --git a/src/c/a3.h b/src/c/a3.h
new file mode 100644
index 0000000..5752e0e
--- /dev/null
+++ b/src/c/a3.h
@@ -0,0 +1,2 @@
+void mempdump(unsigned char *string);
+int memreplace(char *string, char cin, char cout, char **caddr);
\ No newline at end of file