.将下面由PDL描述的一段非结构化程序转化为结构化程序。(8分) START WHILE (TRUE) IF (P) THEN G ELSE RETURN 0 END IF IF ( !Q) THEN RETURN 0 END IF END WHILE RETURN 1 END
时间: 2024-02-10 10:11:05 浏览: 119
下面是结构化程序的转化:
```
START
WHILE (TRUE)
IF (P)
THEN G
ELSE RETURN 0
END IF
IF (!Q)
THEN RETURN 0
END IF
END WHILE
RETURN 1
END
```
相关问题
2.将下面由PDL描述的一段非结构化程序转化为结构化程序。(8分) START WHILE (TRUE) IF (P) THEN G ELSE RETURN 0 END IF IF ( !Q) THEN RETURN 0 END IF END WHILE RETURN 1 END
下面是将PDL描述的程序转化为结构化程序的过程:
```
START
WHILE (TRUE)
IF (P)
THEN
G
ELSE
RETURN 0
END IF
IF (!Q)
THEN
RETURN 0
END IF
END WHILE
RETURN 1
END
```
可以转化为:
```
START
WHILE (TRUE)
IF (P)
THEN
G
IF (!Q)
THEN
RETURN 0
END IF
ELSE
RETURN 0
END IF
END WHILE
RETURN 1
END
```
转化后的结构化程序中,每个 IF 语句都包裹着一个块,使得程序更加清晰易懂。同时,将第二个 IF 语句移动到第一个 IF 语句的块中,使得程序的逻辑更加紧凑。
请为某一部分程序写pdl
好的,我以航班信息管理模块为例,为您编写一段PDL代码。
航班信息管理模块主要实现航班信息的添加、查询、修改、删除等功能。以下是该模块的PDL代码:
```
Module: Flight Info Management
Description: This module is responsible for managing flight information, including adding, querying, modifying and deleting flight information.
Data:
- FlightNumber: string
- Departure: string
- Destination: string
- DepartureTime: datetime
- TicketPrice: float
Process:
- AddFlightInfo
Input: FlightNumber, Departure, Destination, DepartureTime, TicketPrice
Output: Success or Failure
Description: Add new flight information to the system.
- QueryFlightInfo
Input: FlightNumber
Output: Flight information (FlightNumber, Departure, Destination, DepartureTime, TicketPrice)
Description: Query flight information by flight number.
- ModifyFlightInfo
Input: FlightNumber, Departure, Destination, DepartureTime, TicketPrice
Output: Success or Failure
Description: Modify flight information by flight number.
- DeleteFlightInfo
Input: FlightNumber
Output: Success or Failure
Description: Delete flight information by flight number.
```
以上是航班信息管理模块的PDL代码,该代码描述了该模块的数据和各个功能的输入输出以及功能的描述,有助于开发人员更好地理解和实现该模块。