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Tuesday, January 31st 2012, 12:25pm

Need help with reading file


I need help. How i can read binary file?

First 8 byte - is a text (ascii), then float64, then int32, then float32*N (where N - previous int32) etc..

Can some one post code for this?

1) open file
2) read 8 byte (text)
3) read float64
4) read int32
5) read massiv float32 with length int32 (from #4)...

PS programm must be cross-platform.


Tuesday, January 31st 2012, 1:48pm

c++ is cross platform. you can use std::fstream to read from files.

You can use read to read exact number of bytes.

in c++, we have double, float, int and char. You can extract these from a file stream using operator <<.

see here

This looks like a homework post, so I'm not oging to do it for you when you've made no effort ;)
If you have a problem, CUT and PASTE your code. Do not retype or simplify it. Give a COMPLETE and COMPILABLE example of your problem. Otherwise we are all guessing the problem from a fabrication where relevant details are often missing.

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