Programming Forums > Application Development > C++

Lesliect6 · Oct 3rd, 2006, 6:52 AM

Hello,

I am a newbie at C++ and you will probably answer this question in seconds, but I would really like your help because I haven't found an answer to this on the internet.
I would like to read specified bytes from a file and store these bytes in variables for further manipulation. The file I/O header does not contain such commands, but these manipulations are essential for the project I want to make. I would like to store 16 bytes in my variable. How is this possible? What is the command I can use?
Thank you,
Leslie

DaWei · Oct 3rd, 2006, 7:21 AM

Look into "Bignum" (or roll your own arithmetic, maybe using a class/struct). I've used 4-, 8-, and 16-bit processors. They worked.

Game_Ender · Oct 10th, 2006, 9:22 PM

If you just want to twiddle the bits (not do arithmetic on them) you can use iostream::read() to read in the number of bytes you want into a buffer and manipulate the contents of the buffer as needed.

Oct 3rd, 2006, 6:52 AM	#1
Lesliect6 Programmer Join Date: Aug 2005 Posts: 68 Rep Power: 4	File manipultion Hello, I am a newbie at C++ and you will probably answer this question in seconds, but I would really like your help because I haven't found an answer to this on the internet. I would like to read specified bytes from a file and store these bytes in variables for further manipulation. The file I/O header does not contain such commands, but these manipulations are essential for the project I want to make. I would like to store 16 bytes in my variable. How is this possible? What is the command I can use? Thank you, Leslie

Oct 3rd, 2006, 7:21 AM	#2
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	Look into "Bignum" (or roll your own arithmetic, maybe using a class/struct). I've used 4-, 8-, and 16-bit processors. They worked. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

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Oct 10th, 2006, 9:22 PM	#3
Game_Ender Professional Programmer Join Date: May 2006 Location: Maryland, USA Posts: 306 Rep Power: 3	If you just want to twiddle the bits (not do arithmetic on them) you can use iostream::read() to read in the number of bytes you want into a buffer and manipulate the contents of the buffer as needed.

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Programming Forums > Application Development > C++

File manipultion