doc: add C? Go? Cgo! article

Originally published on The Go Programming Language Blog, March 17, 2011.

http://blog.golang.org/2011/03/c-go-cgo.html

Update #2547.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/5777054

1 files changed, 23 insertions, 0 deletions

diff --git a/doc/progs/cgo1.go b/doc/progs/cgo1.go
new file mode 100644
index 0000000000..3125cda3d8
--- /dev/null
+++ b/doc/progs/cgo1.go
@@ -0,0 +1,23 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+package rand
+
+// INCLUDE OMIT
+
+/*
+#include <stdlib.h>
+*/
+import "C"
+
+// STOP OMIT
+func Random() int {
+	return int(C.random())
+}
+
+// STOP OMIT
+func Seed(i int) {
+	C.srandom(C.uint(i))
+}
+
+// END OMIT