C++ソースの更新

src/cpp/hello.cpp

@@ -0,0 +1,10 @@
+// hello.cpp
+// Hello world program in C++
+// command: g++ src/cpp/hello.cpp -o dist/hello
+// run: ./dist/hello
+#include <iostream>
+
+int main() {
+    std::cout << "Hello, world!" << std::endl;
+    return 0;
+}