revision #1: 第 1 章增加了对 C++17 的支持

code/1/1.1.cpp

@@ -1,13 +1,19 @@
 //
 // 1.1.cpp
+//
+// chapter 1 introduction
 // c++1x tutorial
 //
 // created by changkun at changkun.de
 //
 
 #include "foo.h"
+#include <iostream>
+#include <functional>
 
 int main() {
-    add(1, 2);
+    [out = std::ref(std::cout << "Result from C code: " << add(1, 2))](){
+        out.get() << ".\n";
+    }();
     return 0;
 }