diff --git a/src/arithmeticSubtraction.c b/src/arithmeticSubtraction.c
new file mode 100644
index 0000000..f8a7eb5
--- /dev/null
+++ b/src/arithmeticSubtraction.c
@@ -0,0 +1,10 @@
+
+#include "arithmeticSubtraction.h"
+
+#include <stdlib.h>
+
+int* subtraction_integer(int a, int b) {
+    int* result= malloc(sizeof (int));
+    *result=a - b;
+    return result;
+}
diff --git a/src/arithmeticSubtraction.h b/src/arithmeticSubtraction.h
new file mode 100644
index 0000000..5a36ba5
--- /dev/null
+++ b/src/arithmeticSubtraction.h
@@ -0,0 +1,7 @@
+
+#ifndef THEADMIRALS_ARITHMETICSUBTRACTION_H
+#define THEADMIRALS_ARITHMETICSUBTRACTION_H
+
+int* subtraction_integer(int a, int b);
+
+#endif //THEADMIRALS_ARITHMETICSUBTRACTION_H
diff --git a/test/test_arithmeticSubtraction.c b/test/test_arithmeticSubtraction.c
new file mode 100644
index 0000000..26d05c4
--- /dev/null
+++ b/test/test_arithmeticSubtraction.c
@@ -0,0 +1,18 @@
+#include "../src/arithmeticSubtraction.h"
+#include "unity.h"
+#include "limits.h"
+
+void setUp(void) {
+    // set stuff up here
+}
+
+void tearDown(void) {
+    // clean stuff up here
+}
+void test_arithmeticSubtraction_subractionoftwonumbers(void) {
+    int expectedResult = 7;
+    int* result;
+    result = subtraction_integer(14, 7);
+    TEST_ASSERT_EQUAL_INT(expectedResult, *result);
+}
+