I have a binary file and I need to read 4 bytes per reading and store it as type long. I tried fgetc, I did 4 fgetc which I stored in an array of type char but I hit a brick wall when I tried to convert the array to type long.
1. Maybe I am overlooking something, can I read a type long directly from a binary file?
2. Or can I convert an array of type char to a long?
To majidkamali1370: In response to your suggestion: add a 2 byte padding after that. do this in the program that creates the file
The program is a school homework. and the test file is furnished by my professor. He mentioned to us that our code have to deal with, upon reaching end-of-file and the bytes read is less than 4. And since he mentioned that he intentionally provided a binary file that will test that condition. We are not to modify the TestFile.
I can read the entire file and count the bytes and do a, if ((bytecount % 4) != 0) and when the result is true this tells that at the end I can expect to read less that 4 bytes. I can also do "numberOfRead= bytecount/4; and just do that "numberOfRead" access to the file. However, I can guarantee that this is not the solution he wants to see.
Anyway, I appreciate all the feedback and actually I followed "Disch" suggestion used "fread" instead of sticking with "fscanf" and it worked. I am assuming that the crashing of the program has nothing to do with the "fread" function but a bug in my program.
Keep feeding your brainstorm, The more suggestion I get the better I could deal with my homework.
crashing mean an exception.
add a try...catch block around fread function.
In the catch block add the fread function with a 2 byte short variable and around that fread, add a try...catch block if the content is one-byte wide.
Something like below