What is the current ANSI C standard version?

C11 is the current and latest standard of the C programming language and, as the name suggests, this standard was adopted in 2011. The formal document describing the C11 standard is called ISO/IEC 9899:2011.

What are the new features of C11 or ISO 9899 2011 standard?

Additionally, C11 includes Unicode support, compliance with IEC 60559 floating-point arithmetic and IEC 60559 complex arithmetic, memory alignment facilities, anonymous structs and unions, the _Noreturn function specifier, and most importantly – multithreading support.

Is C ever updated?

C17 is the informal name for ISO/IEC 9899:2018, the most recent standard for the C programming language, prepared in 2017 and published in June 2018. Since it was under development in 2017, and officially published in 2018, C17 is also commonly referred to as C18.

What is the function declaration in C programming?

Function Declaration in C Programming. A function declaration in C tells the compiler about function name, function parameters and return value of a function.

How do you declare a variable in C89?

For C89, you must declare all of your variables at the beginning of a scope block. So, your char c declaration is valid as it is at the top of the for loop scope block. But, the char *s declaration should be an error.

How many variable declarations should a function have at the start?

If you work in a codebase where the developers are against the idea of subroutines, then you’ll have 50 variable declarations at the start of the function and some of them might just be an “i” for a for-loop that’s at the very bottom of the function. I therefore developed declaration-at-the-top-PTSD from this and tried to do option 2) religiously.

When to declare local variables in programming languages?

All modern languages recommend and sometimes even enforce the declaration of local variables at the latest point: where they’re first initialized. Because this gets rid of the risk of using a random value by mistake.