Docs: move rnd API to proper location

web/docs/api/03-rnd.md → web/docs/api/03-generators/01-rnd.md

@@ -10,7 +10,7 @@ toc_max_heading_level: 4
 
 ---
 
-### `nextInt(minNum, maxNum)`
+### `.nextInt(minNum, maxNum)`
 
 ```cpp
 int nextInt(int minNum, int maxNum);
@@ -19,47 +19,47 @@ int nextInt(int minNum, int maxNum);
 Returns a uniformly distributed random integer (int) between **minNum** and **maxNum**, inclusive.
 
 
-### `nextInt(maxNumEx)`
+### `.nextInt(maxNumEx)`
 
 ```cpp
 int nextInt(int maxNumEx);
 ```
 
 Returns a uniformly distributed random integer (int) between 0 and **maxNumEx** - 1, inclusive.
 
-### `nextLongLong(minNum, maxNum)`
+### `.nextLongLong(minNum, maxNum)`
 
 ```cpp
 long long nextLongLong(long long minNum, long long maxNum);
 ```
 
 Returns a uniformly distributed random integer (long long) between **minNum** and **maxNum**, inclusive.
 
-### `nextLongLong(maxNumEx)`
+### `.nextLongLong(maxNumEx)`
 
 ```cpp
 long long nextLongLong(long long maxNumEx);
 ```
 
 Returns a uniformly distributed random integer (long long) between 0 and **maxNumEx** - 1, inclusive.
 
-### `nextDouble(minNum, maxNum)`
+### `.nextDouble(minNum, maxNum)`
 
 ```cpp
 double nextDouble(double minNum, double maxNum);
 ```
 
 Returns a uniformly distributed random real number (double) between **minNum** and **maxNum**, inclusive.
 
-### `nextDouble(maxNum)`
+### `.nextDouble(maxNum)`
 
 ```cpp
 double nextDouble(double maxNum);
 ```
 
 Returns a uniformly distributed random real number (double) between 0 and **maxNum**, inclusive.
 
-### `shuffle(first, last)`
+### `.shuffle(first, last)`
 
 ```cpp
 void shuffle(std::RandomAccessIterator first, std::RandomAccessIterator last);

web/docs/api/03-generators/_category_.yml

@@ -0,0 +1,5 @@
+label: Generators
+link: 
+  type: generated-index
+  slug: /api/generators
+  description: TCFrame provides several generators, which can be used to generate the I/O variables in test spec.

web/docs/topic-guides/07-test-cases.md

@@ -164,7 +164,7 @@ void randomArray() {
 }
 ```
 
-For more details, consult the [API reference for random number generator](../api/rnd).
+For more details, consult the [API reference for random number generator](../api/generators/rnd).
 
 ## Test case lifecycle