Should I use C99 or C89?

Bottom line: use C99 unless you need to support MSVC, in which case you’re stuck with C89. Note that VLAs were made optional in C11, due to implementation difficulty.

Should you use C99 or C11?

It is best to use C11 as that is the current standard. C99 and C11 both contained various “language bug fixes” and introduced new, useful features.

Which one is the best compiler for C?

Explanations to C Compilers

• 1) Borland Turbo C. Turbo C is one of the basic and popular compilers for the C programming language.
• 2) Tiny C Compiler. The Tiny C Compiler is designed to work on slow computers with little disk space.
• 3) Portable C Compiler.
• 4) GCC.
• 5) Clang.

What is new in C11 standard?

C11 eliminates these hacks by introducing two new datatypes with platform-independent widths: char16_t and char32_t for UTF-16 and UTF-32, respectively (UTF-8 encoding uses char, as before). C11 also provides u and U prefixes for Unicode strings, and the u8 prefix for UTF-8 encoded literals.

What is C99 code?

C99 (previously known as C9X) is an informal name for ISO/IEC 9899:1999, a past version of the C programming language standard. The C11 version of the C programming language standard, published in 2011, replaces C99.

What is C89 used for?

The c89 command, by default, invokes the IBM IBM C for VM/ESA compiler to compile C application source code. The application source code can be compiled and built at one time or compiled and then bound at another time with other application source files or compiled objects.

Is C89 compatible with C99?

C99 may thus be compatible with the language that its authors thought was described by C89, but is not compatible with the language that was processed by most C89 compilers throughout the 1990s. Thanks for contributing an answer to Stack Overflow!

Is there any reason to use C99?

Unless you know that you cannot use a C99-compatible compiler (the Visual Studio C compiler is the most prominent candidate) there is no good reason for not using the nice things C99 gives you. However, even if you need to support that compiler you can use someC99 features – just not all of them.

Is there a C89 way of doing Vlas?

There is no standard C89 way of doing VLAs, and indeed, without VLAs I’m not sure C99 would have supported mixed declarations and code. Perhaps yes, because it’s a common extension to C89, but like in C++, other language features make it a practical necessity.

Which C compiler supports C99 variable declaration?

AFIAK, Microsoft VC does not support C99. But gcc,intel Ccompiler, Pelles C all support C99. (at least most C99 features). vardiadic macro is just C pre processor. You could just use C99 cpp. variable declaration anywhere is most likely supported in C/C++ compiler since C++ also allows.