C++Builder > Binary Number 0b1 Causes Error E2141 - Stack Overflow

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Learn more about Labs C++Builder > binary number 0b1 causes error E2141 Ask Question Asked 8 years, 3 months ago Modified 8 years, 3 months ago Viewed 1k times 1

I am using C++ Builder XE4.

I am trying to use a binary number such as 0b1 in my code.

Following is the code I tried:

void __fastcall TForm1::Button1Click(TObject *Sender) { int num = 0b11; }

The above causes a compiler error:

Unit1.cpp(19): E2141 Declaration syntax error

Does C++Builder support binary numeration like this?

I confirmed that 0x11 works in C++Builder.

I also confirmed that 0b11 can be used in IDEOne using C++:

http://ideone.com/oy4aIZ

• c++builder
• c++builder-xe4

Share Improve this question Follow edited Aug 18, 2016 at 0:59 Remy Lebeau 591k3333 gold badges491491 silver badges829829 bronze badges asked Aug 17, 2016 at 9:54 sevenOfNinesevenOfNine 1,5541818 silver badges3939 bronze badges 1

• 3 I'd guess the compiler simply doesn't support it. – Joey Commented Aug 17, 2016 at 10:04

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2 Answers 2

Sorted by: Reset to default Highest score (default) Trending (recent votes count more) Date modified (newest first) Date created (oldest first) 2

Binary notation of integer literals is a new feature in C++14. However, no C++Builder version has a C++14 compiler at this time.

In XE4, the Win32 compiler and OSX compiler do not support C++11 at all (a 32bit C++11 compiler was added in 10.0 Seattle). The Win64 compiler supports C++11, though.

The current C++Builder compilers support only decimal, octal, and hex. See Embarcadero's documentation for details: Integer Constants

Share Improve this answer Follow answered Aug 18, 2016 at 1:19 Remy LebeauRemy Lebeau 591k3333 gold badges491491 silver badges829829 bronze badges 1

• Thank you all. I was trying to find this kind of information using google, but without success. Now I can find it using keyword "Integer Constants". I appreciate it. – sevenOfNine Commented Aug 18, 2016 at 2:13

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If you want to compile this, you will need a newer version of the C++ Builder with a C++11 compiler.

Share Improve this answer Follow answered Aug 17, 2016 at 11:02 KeremKerem 44955 silver badges2222 bronze badges 2

• 2 In XE4, the Win64 compiler is a C++11 compiler, but the Win32 compiler and OSX compiler are not. – Remy Lebeau Commented Aug 18, 2016 at 1:11
• 2 However, according to this reference and this article, binary notation is new in C++14, not C++11. – Remy Lebeau Commented Aug 18, 2016 at 1:11

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