fclose(stream)

fclose(stream)是一个C语言中的函数，用于关闭一个已经打开的文件流。它的作用是将缓冲区中的数据写入文件，并释放该文件流所占用的资源。在使用该函数时，需要注意一些细节，比如要确保文件流已经成功打开，否则会出现错误。同时，为了避免程序逻辑过于复杂，可以将fclose放在程序能够退出执行的地方，并在fclose前加一句if (fp!= NULL)进行判断。

相关问题

一个stream!=NULL 的问题 fclose.c 47

这个问题是在 fclose 函数中出现的，它表示在尝试关闭一个文件流时，传入的文件流指针是非空的，但是关闭操作却失败了。具体原因可能是文件流指针无效或者文件已经关闭。建议检查一下代码中是否正确打开了文件，以及是否在关闭文件之前对其进行了操作。同时也可以尝试使用其他的文件操作函数来代替 fclose 函数，看看问题是否得以解决。

fopen fclose

fopen and fclose are functions in the C programming language that are used to open and close files.

fopen function is used to open a file and returns a file pointer that is used to access the file. The syntax of the function is:

FILE *fopen(const char *filename, const char *mode);

where filename is the name of the file to be opened and mode is the mode in which the file is to be opened (read, write, append, etc.). The function returns a pointer to the file if it is successfully opened, or NULL if there is an error.

fclose function is used to close a file that was previously opened using fopen. The syntax of the function is:

int fclose(FILE *stream);

where stream is the file pointer that was returned by fopen. The function returns 0 if the file is successfully closed, or EOF if there is an error.

It is important to close files after they are opened because leaving them open can cause memory leaks and other issues.