指定指向LARGE_INTEGER值的指针,其中 HighPart 成员设置为 - 1,LowPart 成员设置为系统定义的值FILE_USE_FILE_POINTER_POSITION。 传递ByteOffset 的NULL 指针。 如果ZwWriteFile 使用由 I/O 管理器维护的当前文件位置,则通过添加完成写入操作时写入的字节数来更新当前文件位置。 即使I/O 管理器维护当前文件位置,调...
To change the file handle’s position use seek() method. As we discussed, the seek() method sets the file’s current position, and then we can read or write to the file from that position. Syntax: f.seek(offset, whence) How many points the pointer will move iscomputed from addingoffs...
文件状态标志(File Status Flags):文件状态标志用于描述文件的状态,例如文件是否可读、可写、是否为阻塞模式等等。 文件位置指针(File Position Pointer):文件位置指针用于标识文件中的当前位置,应用程序可以使用它来读取或写入文件。 文件句柄是操作系统中非常重要的概念,它允许应用程序访问文件系统中的文件。在编写应用程...
File identifier of an open file, specified as an integer. Before usingfseek, you must usefopento open the file and obtain its identifierfileID. Data Types:double Number of bytes to move fromorigin, specified as an integer. The value ofoffsetcan be positive, negative, or zero. ...
Using file pointer, we can read or write data from random access file at any position. To get the current file pointer, you can call getFilePointer() method and to set the file pointer index, you can call seek(int i) method. 使用文件指针,我们可以在任何位置从随机访问文件读取或写入数据。
Open the following badpoem.txt file and perform read operations (which advance the position pointer) and then use seek to move to a new position in the file. Use fopen to open the file. Then, use ftell to query the current position. Get fid = fopen('badpoem.txt'); ftell(fid) ans...
如果傳回值是INVALID_SET_FILE_POINTER,而且lpDistanceToMoveHigh不是NULL,則應用程式必須呼叫GetLastError來判斷函式是否成功或失敗。 下列程式代碼範例示範該案例。 C++ // Case One: calling the function with lpDistanceToMoveHigh == NULL// Try to move hFile file pointer some distanceDWORD dwPtr = SetFi...
File identifier of an open file, specified as an integer. Before usingfseek, you must usefopento open the file and obtain its identifierfileID. Data Types:double Number of bytes to move fromorigin, specified as an integer. The value ofoffsetcan be positive, negative, or zero. ...
如果返回值为INVALID_SET_FILE_POINTER并且lpDistanceToMoveHigh为非NULL,则应用程序必须调用GetLastError来确定函数是成功还是失败。 下面的代码示例演示了该方案。 C++ // Case One: calling the function with lpDistanceToMoveHigh == NULL// Try to move hFile file pointer some distanceDWORD dwPtr = SetFile...
网络释义 1. 文件指针 软件开发常用名词中英文对照 - Leo Liu - 博客园 ... File Manager 文件管理器file pointer文件指针file scope 文件范围 ... www.cnblogs.com|基于78个网页 2. 文件类型指针 C Programming ... 2 、 example of bit operator 位运算实例。 1 、FILE Pointer(文件类型指针) 。 ......