FSEEK VS退？ [英] fseek vs rewind?

问题描述

我注意到两个方法返回到文件的开头

I have noticed two methods to return to the beginning of a file

FILE *fp = fopen("test.bin", "r")
fseek(fp, 0, SEEK_END);
rewind(fp);

和

FILE *fp = fopen("test.bin", "r")
fseek(fp, 0, SEEK_END);
fseek(fp, 0, SEEK_SET);

会有什么区别，如果这些方法之间的？

What would be difference if any between these methods?

推荐答案

他们基本上有两种不同的方式来完成同样的事情：将指针设置为文件的开头。唯一的区别是，退也清除错误指示器。

They are basically two different ways to accomplish the same thing: set the pointer to the beginning of the file. The only difference is that rewind also clears the error indicator.

如果有选择，你应该使用 fseek的。这是因为退不返回一个整数，指示操作是否成功。

If given the choice, you should use fseek. This is because rewind doesn't return an integer indicating whether the operation has succeeded.

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