add cmake demo

Author: ShiqiYu

week05/examples/cmakedemo/CMakeLists.txt

@@ -0,0 +1,5 @@
+cmake_minimum_required(VERSION 3.10)
+
+project(hello)
+
+add_executable(hello main.cpp)

week05/examples/cmakedemo/main.cpp

@@ -0,0 +1,8 @@
+#include <iostream>
+using namespace std;
+
+int main()
+{
+    cout << "Hello, SUSTech." << endl;
+    return 0;
+}