在C ++中读取文件某个位置的字节

Question

Is it possible to open a file and reading an only byte at a certain position without having to load all the file into an array?

For example, having a file of 10 bytes, and reading the 5th.

Answer 1

是的，使用istream :: seekg寻找你想要读取的位置，然后istream :: get读取一个字节（或istream :: read读取多个字节）。

Answer 2

Yes, fseek and fgetc will do exactly this.

http://www.cplusplus.com/reference/clibrary/cstdio/fseek/

http://www.cplusplus.com/reference/clibrary/cstdio/fgetc/