1. 画出下列伪代码程序的程序流程图和盒图。 START IF p THEN WHILE q DO f END DO ELSE BLOCK g h END BLOCK END IF STOP

这个伪代码描述的是一个条件控制下的循环结构，其中包含了一个if-then-else分支以及一个while循环。以下是对应的流程图和盒图解释：

**流程图：**

+----------------+
|   START        |
+----------------+
|       |         |
V       V         V
+-------+---------+-------+
| IF    |  THEN   | ELSE  |
+-------+---------+-------+
|        |         |       |
V        V         V
+--------v--------+--------+
|  p     | WHILE   | BLOCK  |
+--------+---------+--------+
|        | q      | g      |
|        | -------->| h     |
|        | f      |        |
+--------v--------+--------+
             |
            END
+----------------+
|   STOP         |
+----------------+

**盒图（伪UML语言）：**

START
+-----------------------------+
|                             |
|              if (p) {        |
|                +---------+|
|                | WHILE  | |
|                +---------+|
|                             |
|                  while(q) {|
|                    +--------+|
|                    | f      | |
|                    +--------+|
|                             |
|                }            |
|                             |
|           } else {          |
|             +---------------+ |
|             | BLOCK         | |
|             +---------------+ |
|                             |
|                 g;          |
|                             |
|                 h;          |
|                             |
|           }                   |
|                             |
+-------------------------------+
STOP