# C*

> object-oriented, data-parallel superset of ANSI C with synchronous semantics

**Wikidata**: [Q5005842](https://www.wikidata.org/wiki/Q5005842)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/C*)  
**Source**: https://4ort.xyz/entity/c-q5005842

## Summary
C* is an object-oriented, data-parallel programming language that functions as a superset of ANSI C. Created in 1987, it is distinguished by its synchronous semantics and support for parallel programming paradigms. The language utilizes a static, manifest typing discipline and extends the traditional C framework to handle data-level parallelism.

## Key Facts
- **Inception:** The programming language was developed in 1987.
- **Classification:** It is an instance of a programming language.
- **Core Architecture:** C* is a superset of ANSI C, meaning it extends standard C with additional capabilities.
- **Paradigms:** It supports multiple programming paradigms, including object-oriented, imperative, parallel, and multi-paradigm programming.
- **Typing Discipline:** The language employs static typing, manifest typing, and weak typing.
- **Semantics:** It features synchronous semantics designed for data-parallel operations.
- **Related Languages:** It is closely related to "Dataparallel C," another language based on C with parallel extensions.

## FAQs
### Q: What makes C* different from standard C?
A: C* is a superset of ANSI C that adds object-oriented capabilities and data-parallel extensions. Unlike standard C, it is designed specifically for synchronous, parallel programming tasks.

### Q: What programming paradigms does C* support?
A: C* is a multi-paradigm language. It supports object-oriented programming, imperative programming, and parallel programming methodologies.

### Q: When was C* created?
A: The language was inceptioned in 1987.

## Why It Matters
C* represents a significant evolutionary step in the history of high-performance computing languages. By extending the widely-used ANSI C standard into the realm of data-parallelism, it provided an early model for how developers could manage parallel processing without abandoning the C syntax ecosystem. Its design integrates object-oriented programming with synchronous semantics, allowing for the efficient management of complex data structures across parallel hardware.

The language serves as a historical bridge between traditional imperative programming and the specialized demands of parallel architectures. Its existence highlights the software engineering challenges of the late 1980s, where the need to process large arrays of data simultaneously required new linguistic constructs, such as those found in C* and its relative, Dataparallel C.

## Notable For
- Being a **superset of ANSI C**, allowing developers to use existing C knowledge while gaining parallel capabilities.
- Integrating **object-oriented programming** with **data-parallel** features, a combination that was distinct in the late 1980s.
- Utilizing **synchronous semantics**, which differentiates it from asynchronous parallel languages.
- Serving as a precursor or relative to **Dataparallel C**.
- Employing a unique combination of **static and weak typing** within a parallel computing context.

## Body
### Technical Specifications
C* is strictly defined as a superset of the ANSI C programming language. It incorporates the standard imperative features of C but expands upon them to include object-oriented structures. The language's primary distinction is its focus on data parallelism, which allows it to execute operations on multiple data points simultaneously.

### Typing and Semantics
The typing discipline of C* is multifaceted, utilizing:
- **Static Typing:** Type checking is performed at compile time.
- **Manifest Typing:** Variable types must be explicitly declared by the programmer.
- **Weak Typing:** It allows for certain implicit type conversions, similar to standard C.

The language operates on **synchronous semantics**, meaning that parallel operations are generally performed in a lockstep manner, where all processors execute the same instruction on different data points simultaneously.

### Historical Context and Relations
Incepted in 1987, C* emerged during a period of intense research into parallel computing architectures. It is classified within knowledge bases as a distinct "programming language" and maintains a documented relationship with **Dataparallel C**, which is described as a language based on C with parallel extensions. C* is designed to facilitate communication instructions to a machine, specifically optimized for parallel hardware environments.