C binary file input

On compilers for 8 and 16 bit processors including Intel x86 processors executing in 16 bit mode, such as under MS-DOS , an int is usually 16 bits and has exactly the same representation as a short. On compilers for 32 bit and larger processors including Intel x86 processors executing in 32 bit mode, such as Win32 or Linux an int is usually 32 bits long and has exactly the same representation as a long. A int holds 32 bits thus you see 01 00 00 00 in your hex-editor. If you open the file test.

Or if you want to use int, accept that 4 bytes are written in the binary file but at least you know now why this is. Hi, after piratical and try to understanding write and read, my write is perfect what i want, but i can not read my bin file, i need some help please,. I have tested them and they work, so good luck!

Hi, Tanks for your help and support, my last message with my binary writer test, is perfect for me, because i can write a hex value directly in file , 00 to FF anywhere i want in file, but i cant read it with fread after, i want practice this with a small file i have create because my true application i want manage.

Is this the right declaration of a binary file Binary files should have b in the mode e. But if you open test. But to keep the syntax correct, we have changed the source code examples. Is there a possibility to deal with data packing of the compiler in the structure, because due to this structure members are not necessarily continuous in the memory.

And mention that you get garbage without the rewind. If you seek to the end of file and then offset beyond the end of the file, you will be reading garbage, you need a negative offset. The search for the end of the file is only done, so we that we can rewind. I want to dump some memory into a file, a complex structure which contains pointers to list etc, and again want to set the same memory from this file.

I want to store a character array data 89 bytes to a binary file. Please send the fwrite function code for this. Is it possible to store current PC time to same binary file? You just have to add some additional lines. The examples now only uses the variable x to keep the examples smaller.

To use all three x,y,z variables add the following lines to the examples:. I tried. Please enlighten me with your wisdom, great one.

Hey everybody! Thanks a lot for the kind help. It really helped me to my aim what I was finding. Thanks again… Have happy programming…! Can you add another program of telling how to add and delete records at particular positions..?

Hello I am trying to read satellite CEOS format file which contacined all type of data like integer ascii,binary.

I know structure of binary file. I am reading file according to structure but not able to display data. Active 3 years, 9 months ago. Viewed times. The inputs should be used in this way: 0 Padding for the whole file! Maybe I miss understand what do you mean by binary input? You need to read the number directly? In this case what is your format? I need to read the binary numbers directly. Printing as buffer - '0' gave me strange outputs..

Ok, but we need for information, what is the format of your data? I count 53 bit in your exemple, that seem very strange. Well, it's gonna be a long answer ; Your question is more clear, now. You input is either 3-integer values, 6-short values, or char values. You can read the input into arrays of either and then use bitwise operators to extract the bits as needed. Show 5 more comments. Active Oldest Votes.

Code-Apprentice Code-Apprentice 74k 19 19 gold badges silver badges bronze badges. Add a comment. Stargateur Stargateur The next two arguments specify the size and number of the data items that need to be read from the given file. Finally, the fourth argument to the function is the FILE pointer from which the data should be read. In the following example, we open and write some arbitrary bytes to the file named input. Then, we close the file and open it again for reading.