Linux中off_t的打印格式说明符 [英] print format specifier of off_t in linux

问题描述

如何打印类型为off_t的变量的值.

Hi,
How do i print the value of a variable of type off_t.

推荐答案

好吧，off_t定义为:

Well, off_t is defined as:

报价:

off_t文件偏移量，以从文件或设备开头开始的字节数为单位. off_t通常定义为带符号的32位整数.在启用大文件的编程环境中，off_t被定义为带符号的64位整数.

off_t File offset, measured in bytes from the beginning of a file or device. off_t is normally defined as a signed, 32-bit integer. In the programming environment which enables large files, off_t is defined to be a signed, 64-bit integer.

这意味着您可以将大小(以字节为单位)与32位整数和64位整数进行比较(以确定大小)，并在转换后以带符号的32/64位整数(使用其格式说明符)进行打印.

Which means you can compare the size (in bytes) to a 32bit integer and a 64bit integer (to determine the size) and print as either a signed 32/64 bit integer (using their format specifier) after casting.

off_t someVar;

printf(％ld \ n"，(long long)someVar);

off_t someVar;

printf("%ld\n", (long long)someVar);

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