![]() ![]() While variables have always a type and the compiler always checks the type correctness, the programmer can override this behavior forcing casts even between incompatible types or using pointers to unions or structs to reinterpret the low-level bytes layout of the data in memory. } Main features of C Technical features Statically, weakly typedĬ has a static but weak type system. ![]() The original version of it is this: main() The program prints "hello, world" to the standard output or to a console, a terminal, a screen display or to whatever textual output the running environment provides to the application. Writing the classic "Hello world" program for a programming language is a consolidated practice effectively invented exactly with the introduction od the C language by Dennis Ritchie. At the same time, despite being very low-level, cross-platform portability has been one of the main goal of the language and its associated standard libraries hence its wide availability on practically any existing computer platform.Ĭ has been standardized by the American National Standards Institute (ANSI) since 1989 and later by the International Organization for Standardization (ISO).Įxample: The classic "Hello world" program written in C: The language was designed to provide low-level access to memory, has constructs that map efficiently to machine instructions and require minimal run-time support. ![]() Today C is one of the most used programming languages of all time, and is the one most available to program with on any machine, from embedded microcontrollers to supercomputers, being a C compiler practically the first software that is developed when a new hardware is created. It is a statically, weakly typed, imperative, structured programing language with manual memory management whose main purpose was to replace as much as possibile the even more low-level languages like assembly at the time used to develop those softwares that require low-level access to the hardware they run on like operating systems, file systems, communications protocols and so on.Ĭ was invented by Dennis Ritchie at Bell Labs, and was immediately used to re-implement the Unix operating system. The one by which (almost) all the others derived, the one always in the top two positions of the TIOBE index, the one you can program with no matter how rare or exotic is the hardware you have your hands onĬ is a computer programing language first appeared on the sceneĥ0 years ago (1972). Almost half a century after its first appearance, C is THE programming language. ![]()
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