baidut / baidut/Programming-in-C

fopen函数返回NULL的情况有哪些?

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函数
Dominant language
C
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Description

有几种情况:
1. 硬盘空间满,不能再创建文件
2. 文件名有错误,有非法字符比如?,*等
3. 你对那个目录没有创建文件的权限,比如NTFS
4. 文件已经存在,但是无法被覆盖或者打开,比如另一个进程已经独占打开了,这是你就不能再打开了

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