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C is an imperative (procedural) systems implementation language. It was designed to be compiled using a relatively straightforward compiler, to provide low-level access to memory, to provide language constructs that map efficiently to machine instructions, and to require minimal run-time support. C was therefore useful for many applications that had formerly been coded in assembly language. from http://en.wikipedia.org/wiki/C_(programming_language)

3 votes

C struct v union in embedded programming - why?

As already described, Union is a kind of predefined typecast, where all elements will share the same memory space, so is pretty handy to do data serialization and deserialization (as long both systems …
Gustavo Laureano's user avatar