Add a hello world example

Author: ghasemloo

BUILD.bazel

@@ -0,0 +1,32 @@
+package(default_visibility = ["//visibility:public"])
+
+cc_binary(
+    name = "main",
+    srcs = ["main.cc"],
+    deps = [
+        ":hello_world",
+    ],
+)
+
+cc_library(
+    name = "hello_world",
+    srcs = [
+        "hello_world.cc",
+    ],
+    hdrs = [
+        "hello_world.h",
+    ],
+    deps = [
+    ],
+)
+
+cc_test(
+    name="hello_world_test",
+    srcs = [
+        "hello_world_test.cc",
+    ],
+    deps = [
+        ":hello_world",
+        "@com_google_googletest//:gtest_main",
+    ],
+)

README.md

@@ -1 +1,3 @@
-# bazel_cpp_example
+# Bazel C++ Example
+
+Simple example to demonstrate how to use [Bazel](https://bazel.build) with C++.

WORKSPACE

@@ -0,0 +1,18 @@
+# Bazel toolchains
+http_archive(
+    name = "bazel_toolchains",
+    urls = [
+        "https://mirror.bazel.build/github.com/bazelbuild/bazel-toolchains/archive/r324073.tar.gz",
+        "https://github.com/bazelbuild/bazel-toolchains/archive/r324073.tar.gz",
+    ],
+    strip_prefix = "bazel-toolchains-r324073",
+    sha256 = "71548c0d6cd53eddebbde4fa9962f5395e82645fb9992719e0890505b177f245",
+)
+
+# GoogleTest/GoogleMock framework. Used by most unit-tests.
+http_archive(
+     name = "com_google_googletest",
+     urls = ["https://github.com/google/googletest/archive/master.zip"],
+     strip_prefix = "googletest-master",
+)
+

hello_world.cc

@@ -0,0 +1,17 @@
+#include <string>
+
+#include "hello_world.h"
+
+namespace {
+const char* message = "Hello World!";
+}
+
+namespace hello_world {
+
+HelloWorld::HelloWorld() {}
+
+std::string HelloWorld::Message() {
+  return message;
+}
+
+}  // namespace hello_world

hello_world.h

@@ -0,0 +1,20 @@
+#ifndef HELLO_WORLD_H_
+#define HELLO_WORLD_H_
+
+#include <string>
+
+namespace hello_world {
+
+// HelloWorld is a simple class.
+class HelloWorld {
+ public:
+  // HelloWorld constructor.
+  HelloWorld();
+
+  // Message returns a Hello World message.
+  std::string Message();
+};
+
+}  // namespace hello_world
+
+#endif  // HELLO_WORLD_H_

hello_world_test.cc

@@ -0,0 +1,14 @@
+#include "hello_world.h"
+
+#include <iostream>
+
+#include "gtest/gtest.h"
+
+namespace {
+
+TEST(HelloWorld, Message) {
+  auto msg = hello_world::HelloWorld().Message();
+  EXPECT_EQ(msg, "Hello World!");
+}
+
+}

main.cc

@@ -0,0 +1,10 @@
+#include <iostream>
+
+#include "hello_world.h"
+
+int main(int argc, char** argv) {
+  auto msg = hello_world::HelloWorld().Message();
+  std::cout << "stdout: " << msg << std::endl;
+  std::cerr << "stderr: " << msg << std::endl;
+  return 0;
+}