For example, here's a C program that writes a 4-byte signed integer to a file: But here's a question: how do you know that the data is Little-Endian?
One common solution is to start files with a “magic number” that indicates the byte order. An alternative is to specify the ordering, and require writers to follow that specification.
I highly recommend his article on the history and evolution of C, as an example of how a language designer thinks. In Gulliver's Travels, the two societies of Lilliputians break their eggs from different ends, and that minor difference has led to eternal strife.
These operations are responsible for finding the particular field within the object and converting it (if necessary) to fit the fixed-width JVM stack.Instead, C (and C ) allows you to use a structure or class definition as a “view” on arbitrary memory.You can take any pointer, cast it as a pointer-to-structure, and then access that memory using code like to maximize the efficiency of access for a particular architecture.A program running on a modern operating system thinks that it has a large, contiguous allotment of memory: 2 gigabytes in the case of 32-bit editions of Windows and Linux, 8 terabytes or more for x64 editions (limited both by the operating system and the hardware itself).Behind the scenes, the operating system maintains a “page table” that identifies where in physical memory (or disk) the data for a given virtual address resides.