docs: link to online doc from README

README.md

@@ -7,23 +7,9 @@ This repository is a C client for [SpringQL](https://github.com/SpringQL/SpringQ
 
 You can link your application with the shared library and run SpringQL in embedded mode.
 
-### Getting Started
+## Documentation
 
-#### APIs
-
-Take a short look to [springql.h](https://github.com/SpringQL/SpringQL-client-c/blob/main/springql.h), which declares all of C APIs and types to use from your application.
-
-#### Installation
-
-All you need to do are:
-
-- Download latest header file and shared library from [release page](https://github.com/SpringQL/SpringQL-client-c/releases).
-- Put `springql.h` to somewhere where your compiler recognize as an include path.
-- Put `libspringql_client.{so,dylib}` to somewhere where your compiler recognize as a library path (one in `$LD_LIBRARY_PATH` is a good option).
-
-#### Example application
-
-See [`c_example/`](https://github.com/SpringQL/SpringQL-client-c/tree/main/c_example) for how to write and build a SpringQL embedded application.
+Read <https://SpringQL.github.io/> for installation guide, tutorials, and references.
 
 ## Versioning
 

c_example/README.md

@@ -1,49 +1,8 @@
-## Writing an SpringQL C application (embedded mode)
+## Example C applications
 
-See [`example.c`](example.c)
+Most of applications under this directory are introduced in a [documentation page](https://springql.github.io/get-started/write-basic-apps).
 
-## Building
-
-You need to put `springql.h` to an include path and `libspringql_client.{so,dylib}` to a library path first. Then,
-
-```bash
-gcc example.c -lspringql_client -o run_example
-```
-
-If you haven't downloaded the header and shared library files, then,
-
-```bash
-(cd ..; cargo build)  # build shared library
-gcc example.c -lspringql_client -o run_example -I.. -L../target/debug
-```
-
-You can also use CMake here.
-
-```bash
-(cd ..; cargo build)  # build shared library
-cmake . && make
-```
-
-## Running the sample application
-
-First, you need to run a source server to generate trade data.
-You may need to install `nc` (netcat) to your system.
-
-```bash
-python print_trade.py | nc -l 19876  # running a source server on TCP port 19876
-```
-
-Finally the example app runs.
-
-```bash
-./run_example
-
-[row#0] ts=2021-11-23 05:38:32.589299000 amount=200
-[row#1] ts=2021-11-23 05:38:32.590267000 amount=100
-[row#2] ts=2021-11-23 05:38:32.590284000 amount=900
-[row#3] ts=2021-11-23 05:38:32.590295000 amount=500
-[row#4] ts=2021-11-23 05:38:32.590305000 amount=100
-```
+Read it for building, running the apps.
 
 ## License
 

c_example/trade_projection/trade_projection.c

@@ -1,5 +1,10 @@
 // This file is part of https://github.com/SpringQL/SpringQL-client-c which is licensed under MIT OR Apache-2.0. See file LICENSE-MIT or LICENSE-APACHE for full license details.
 
+// Usage:
+//
+// $ python print_trade.py | nc -l 19876  # running a source server on TCP port 19876
+// $ ./a.out
+
 #include <springql.h>
 #include <assert.h>
 #include <string.h>