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The "\b" didn't work on my Mac. So I tried to find the reason.
I think that cause of this problem may be the version of C.
Or device could be. If you know it, can you help me? Thank you.
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You can ask to change the compiler default C version used for compiling using the -std= option with gcc and clang , for example: -std=c90 , -std=c99 or -std=c11 . This is probably the only helpful Answer.
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.
In 1978, Brian Kernighan and Dennis Ritchie published the first edition of The C Programming Language. This book, known to C programmers as "K&R", served for many years as an informal specification of the language. The version of C that it describes is commonly referred to as K&R C.
C99 introduced several new features, including inline functions, several new data types (including long long int and a complex type to represent complex numbers), variable-length arrays, support for variadic macros (macros of variable arity) and support for one-line comments beginning with //, as in BCPL or C++.
There are three ISO standard versions of C: C90, C99 and C11. To know which C version your program is running check the:
__STDC_VERSION__
macro.
On the other hand if what you want to know is the version not of C but the version of your C compiler, as the other answers suggests, run the compiler with the appropriate option (--version for both gcc and clang for example).
Depending on your compiler it can support different C versions. You can ask to change the compiler default C version used for compiling using the -std= option with gcc and clang, for example: -std=c90, -std=c99 or -std=c11.
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