move sample code to docs/example

docs/en/14-reference/05-connectors/10-cpp.mdx

@@ -66,25 +66,15 @@ In the above example code, `taos_connect()` establishes a connection to port 603
 
 This section shows sample code for standard access methods to TDengine clusters using the client driver.  
 
-### Synchronous query example
+- [Synchronous query example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/demo.c)
 
-- [C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/demo.c)
+- [Asynchronous query example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/asyncdemo.c)
 
-### Asynchronous query example
+- [Parameter binding example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/prepare.c)
 
-- [C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/asyncdemo.c)
+- [Schemaless writing example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/schemaless.c)
 
-### Parameter binding example
-
-- [C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/prepare.c)
-
-### Pattern-free writing example
-
-- [C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/schemaless.c)
-
-### Subscription and consumption example
-
-- [C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/tmq.c)
+- [Subscription and consumption example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/tmq.c)
 
 :::info
 More example code and downloads are available at [GitHub](https://github.com/taosdata/TDengine/tree/develop/docs/examples/c).

docs/en/14-reference/05-connectors/14-java.mdx

@@ -662,7 +662,7 @@ Example usage is as follows.
 
 ### More sample programs
 
-The source code of the sample application is under `TDengine/examples/JDBC`:
+The source code of the sample application is under `TDengine/docs/examples/JDBC`:
 
 - JDBCDemo: JDBC sample source code.
 - connectionPools: using taos-jdbcdriver in connection pools such as HikariCP, Druid, dbcp, c3p0, etc.
@@ -671,7 +671,7 @@ The source code of the sample application is under `TDengine/examples/JDBC`:
 - springbootdemo: using taos-jdbcdriver in Springboot.
 - consumer-demo: consumer TDengine data example, the consumption rate can be controlled by parameters.
 
-[JDBC example](https://github.com/taosdata/TDengine/tree/3.0/examples/JDBC)
+[JDBC example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/JDBC)
 
 ## Frequently Asked Questions
 

docs/en/14-reference/05-connectors/26-rust.mdx

@@ -437,9 +437,9 @@ let taos = pool.get()?;
 
 ### More sample programs
 
-The source code of the sample application is under `TDengine/examples/rust` :
+The source code of the sample application is under `TDengine/docs/examples/rust` :
 
-[rust example](https://github.com/taosdata/TDengine/tree/3.0/examples/rust)
+[rust example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/rust)
 
 ## Frequently Asked Questions