Commit arithmetic Subtraction integer

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;
+}

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

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);
+}
+