This question already has answers here:
Can someone explain hex offsets to me?
(6 answers)
Closed 8 years ago.
I'm trying to understand what an offset in a hex dump is. In particular, what purpose does an offset serve? I have googled many times but not found anything.
The offset describes where something is in the file. You can obtain and jump to offsets in code using lseek(2) or fseek(3), depending on which I/O system you're using.
Related
This question already has answers here:
Explain the concept of a stack frame in a nutshell
(6 answers)
What is an application binary interface (ABI)?
(17 answers)
Closed 2 years ago.
Speaking of the order of parameters, return addresses, local variables and other block statements, how are they pushed inside the stack frame and how that particular order works? I'm having a bit of trouble understanding this concept.
This question already has answers here:
What is the strict aliasing rule?
(11 answers)
Closed 6 years ago.
What really happens if we write 4 times 1B of char with 8bit pointer, and then we read that 4B with 32bit pointer? Why this is not recommended, what can happen?
When you read the 32bits back as an integer you get the integer representation of whatever you wrote.
What you have described is a technique commonly used to deserialize binary data. The reverse procedure will serialize the data.
This question already has answers here:
getting free unit number in fortran
(2 answers)
Closed 7 years ago.
I can write a FORTRAN function to find an available file unit, but I was certain there was already an intrinsic. But if there is, I can't find anything about it. Is there such a thing or am I dreaming?
UPDATE: Apologies for the duplicate. Did a search, but it didn't show up.
I guess, you are looking for newunit (available with F2008, shown at the bottom of that link in the Fortran Wiki).
Ups, has already been answered.
maybe you were thinking of inquire?
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what is meant by normalization in huge pointers
(3 answers)
Closed 9 years ago.
Actually i was studying about huge and far pointers.
I come to know huge pointers are by default in normalized form.
I want to know how can we normalize any pointer?
The huge pointer and far pointer are old concept which live in 16-bit
DOS time. You can search something about DOS programming for more
detail about them.
In 8086 programming (MS DOS), a far pointer is normalized if its offset part is between 0 and 15 (0xF).
This question already has answers here:
How does C compute sin() and other math functions?
(22 answers)
Closed 9 years ago.
Anybody can explain or show how is the function "sin" (or "sinf", "sinl") realized in C.
Intuition suggests that it should be somewhere in the math.h but I did not see anything there
There's a couple ways I can think of right off the bat:
Lookup tables
Approximation via Taylor series (which can be easily made accurate to a number of significant digits).