Adding second direct compilation example

6-InRealEnvironment/2-FileStructure.ipynb

@@ -321,7 +321,33 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "works as expected and creates a valid `hello` executable (also note the header file is not required explicitly in this build command)"
+    "works as expected and creates a valid `hello` executable (also note the header file is not required explicitly in this build command). As in the previous case we can directly compile from heer using the ! symbol as follows:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 15,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "!g++ -std=c++17 2c-Demo/3-InTwoFilesWithHeader/hello.cpp 2c-Demo/3-InTwoFilesWithHeader/main.cpp -o hello"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 16,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Hello world!\n"
+     ]
+    }
+   ],
+   "source": [
+    "!./hello"
    ]
   },
   {