add cpp

cpp/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "rust_sample_cpp"
+version = "0.1.0"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+build = "build.rs"
+
+[dependencies]
+cpp = "0.5.3"
+
+[build-dependencies]
+cpp_build = "0.5.3"
+

cpp/build.rs

@@ -0,0 +1,5 @@
+extern crate cpp_build;
+
+fn main() {
+    cpp_build::build("src/main.rs");
+}

cpp/src/main.rs

@@ -0,0 +1,16 @@
+#[macro_use]
+extern crate cpp;
+
+cpp!{{
+    #include <stdio.h>
+    #include <iostream>
+}}
+
+fn main() {
+    unsafe {
+        cpp!([] {
+            printf("Hello, World!\n");
+            std::cout << "Hello, World2!" << std::endl;
+        });
+    }
+}