The POSIX 1003.1 standard defines only one required entry for struct dirent, an array of char named d_name.

POSIX 1003.1标准仅仅为structdirent定义了一个必需的条目，即char数组d _ name。

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Thus, array (pointer (char), 4) is the type of arrays of 4 Pointers to char.

因此y的类型就是有四个元素、这些元素指向char类型的指针数组。

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Binary source data must be a single-dimensioned array of unsigned char.

二进制源数据必须是一维的无符号字符数组。

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Binary source data must be a single-dimensioned array of unsigned char.

二进制源数据必须是一维的无符号字符数组。

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