Doubts about the C ++ standards [closed]

  

What is the most commonly used standard now?

It's a complicated answer to answer. In my case the current standard is c ++ 11 but in a few months we will change the compiler and we will use c ++ 14.

Generally speaking, I assume that something similar will happen to the rest. There are several reasons to stay stuck in an old standard:

• dependence on third-party libraries without maintenance. Not compiling for new compilers forces you to stagnate until you find a replacement.
• embedded systems. Some embedded systems have compilers with marginal maintenance and this makes them evolve more slowly
• old systems. New compilers may not be available for old OS MSDOS or Windows 95 type.

  

If I make a program, for example, in the C ++ 14 standard, will portability and code execution affect it?

The C ++ 14 standard introduces some novelties regarding c ++ 11, many with respect to c ++ 03. Using one of these features will prevent you from compiling the code under an older standard.

What is the most commonly used standard now?

Cheat question. Not being, far from it, an expert in C ++, nor a professional of the guild, I currently use C ++ 11, mainly due to the great improvements in speed it provides, eliminating many copy operations of instances, which with previous standards were inescapable.

C ++ 11 provides excellent backwards support, so that, with just recompiling, we get an efficiency improvement free .

We can consider it the minimum essential in current projects, and more taking into account that we are in 2017. That standard is already a few years old.

If I make a program for example in the C ++ 14 standard, will portability and code execution affect it?

Another cheating question. The code will compile on any compiler that supports C ++ 14.

If you mean the ease of finding a compiler with support for that standard, g++ is free software, ported to more platforms than I've seen in my life. It should not be a problem, except for very environments .

If you mean auxiliary elements, such as bookstores, that's another topic. As a general rule, if they are maintained, they will support the new standards.

As I mentioned, the backwards compatibility is very good, so most of the old software will not have problems.