Question 20 on VFP, question about VFP

That's 20 points for so many questions, that's too little.

FPV image transmission, which is generally mentioned the most in first-person flight.

VFP stands for Visual FoxPro.

It is an application development software obtained by Microsoft from Fox after several improvements and porting to Windows, mainly used for the development of software for data management and computing.

VFP is the latest visual database management system platform launched by Microsoft, which is a particularly powerful 32-bit database management system.

It offers full-featured tools, an extremely user-friendly interface, simple data access, and unique cross-platform technology.

With good compatibility, true compilability and strong security, it is one of the fastest and most practical database management system software at present.

Graphs are a graphical representation of the E-R model, which is a powerful tool for representing conceptual data models. There are 3 basic concepts in the E-R model, namely Entities, Connections, and Attributes in the E-R diagram which are represented by rectangular boxes and elliptical row boxes, respectively.

2.In VFP, users can use commands to modify the operating environment of the system (such as the default working directory, etc.), or you can open the Options dialog box through menu commands to set it.

3.In VFP, there are multiple system functions related to table operations, such as eof(), bof(), used(), and so on. The function that returns the number of fields that have an open table in the currently selected workspace is fcount().

4.Currently, users typically create and delete folders in an operating system environment, such as in a My Computer or Explorer window. In VFP, you can also use the md command and the rd command to create new folders and delete existing folders.

5.The last three commands in the following segments can be implemented with a functionally equivalent command, which is use cj in 0

set talk off

select 1

use xs

select 0

use cj

select xs

6.In VFP, the system stipulates that the field name of a free table and the index identifier of a table can be up to 10 characters long, and the length of the other names can be more than 100 characters.

7.The answer is "-

9.Answer"quit"

21.The answer is A, W20

23. zap

24.The answer is ".cdx"

Can it solve your problem?

Answer: Option C to figure out the temporary relationship between the three tables:

The C-area table drives the B-area table.

The B-area table drives the A-area table.

recno(),recno(1),recno(3) The current workspace is zone B, and the pointer points to the 8th record. Therefore, the record pointer of the recno()=8a table will automatically point to 8 along with the pointer in section B, so the record pointer in area recn0()=8c does not move with it, because area C is the parent table and will not move with the pointer of child table B.

So recno(3)=1