Is bool a basic datatype in C

Question

I got this doubt while writing some code  Is  bool  a basic datatype defined in the C   standard or is it some sort of extension provided by the compiler   I got this doubt because Win32 has  BOOL  which is nothing but a typedef of long  Also what happens if I do something like this   int i   true    Is it  always  guaranteed that variable i will have value 1 or is it again depends on the compiler I am using   Further for some Win32 APIs which accept BOOL as the parameter what happens if I pass bool variable

User · Answer

yes  it was introduced in 1993   for further reference  Boolean Datatype

User · Answer

Allthough it s now a native type  it s still defined behind the scenes as an integer  int I think  where the literal false is 0 and true is 1  But I think all logic still consider anything but 0 as true  so strictly speaking the true literal is probably a keyword for the compiler to test if something is not false    if someval    true     probably translates to   if someval     false      e g  someval     0   by the compiler

User · Answer

Yes  bool is a built-in type   WIN32 is C code  not C    and C does not have a bool  so they provide their own typedef BOOL

User · Answer

C   does lots of automatic casting for you - that is  if you have a variable of type bool and pass it to something expecting an int  it will make it into an int for you - 0 for false and 1 for true   I don t have my standard around to see if this is guaranteed  but every compiler I ve used does this  so one can assume it will always work    However  relying on this conversion is a bad idea  Code can stop compiling if a new method is added that overloads the int signature  etc

User · Answer

bool is a fundamental datatype in C    Converting true to an integer type will yield 1  and converting false will yield 0  4 5 4 and 4 7 4   In C  until C99  there was no bool datatype  and people did stuff like  enum bool       false  true      So did the Windows API  Starting with C99  we have  Bool as a basic data type  Including stdbool h will typedef  define that to bool and provide the constants true and false  They didn t make bool a basic data-type  and thus a keyword  because of compatibility issues with existing code

User · Answer

bool is a fundamental datatype in C    Converting true to an integer type will yield 1  and converting false will yield 0  4 5 4 and 4 7 4   In C  until C99  there was no bool datatype  and people did stuff like  enum bool       false  true      So did the Windows API  Starting with C99  we have  Bool as a basic data type  Including stdbool h will typedef  define that to bool and provide the constants true and false  They didn t make bool a basic data-type  and thus a keyword  because of compatibility issues with existing code

User · Answer

Yes  bool is a built-in type   WIN32 is C code  not C    and C does not have a bool  so they provide their own typedef BOOL

User · Answer

yes  it was introduced in 1993   for further reference  Boolean Datatype

User · Answer

C   does lots of automatic casting for you - that is  if you have a variable of type bool and pass it to something expecting an int  it will make it into an int for you - 0 for false and 1 for true   I don t have my standard around to see if this is guaranteed  but every compiler I ve used does this  so one can assume it will always work    However  relying on this conversion is a bad idea  Code can stop compiling if a new method is added that overloads the int signature  etc

User · Answer

Allthough it s now a native type  it s still defined behind the scenes as an integer  int I think  where the literal false is 0 and true is 1  But I think all logic still consider anything but 0 as true  so strictly speaking the true literal is probably a keyword for the compiler to test if something is not false    if someval    true     probably translates to   if someval     false      e g  someval     0   by the compiler

User · Answer

yes  it was introduced in 1993   for further reference  Boolean Datatype

User · Answer

bool is a fundamental datatype in C    Converting true to an integer type will yield 1  and converting false will yield 0  4 5 4 and 4 7 4   In C  until C99  there was no bool datatype  and people did stuff like  enum bool       false  true      So did the Windows API  Starting with C99  we have  Bool as a basic data type  Including stdbool h will typedef  define that to bool and provide the constants true and false  They didn t make bool a basic data-type  and thus a keyword  because of compatibility issues with existing code

User · Answer

bool is a fundamental datatype in C    Converting true to an integer type will yield 1  and converting false will yield 0  4 5 4 and 4 7 4   In C  until C99  there was no bool datatype  and people did stuff like  enum bool       false  true      So did the Windows API  Starting with C99  we have  Bool as a basic data type  Including stdbool h will typedef  define that to bool and provide the constants true and false  They didn t make bool a basic data-type  and thus a keyword  because of compatibility issues with existing code

User · Answer

Turbo c and c   compiler does not support boolean  bool keyword  data type but dev c   compiler supports boolean   bool keyword  data type

User · Answer

C is meant to be a step above assembly language  The C if-statement is really just syntactical sugar for  branch-if-zero   so the idea of booleans as an independent datatype was a foreign concept at the time   1   Even now  C C   booleans are usually little more than an alias for a single byte data type  As such  it s really more of a purposing label than an independent datatype    1  Of course  modern compilers are a bit more advanced in their handling of if statements  This is from the standpoint of C as a new language

User · Answer

Yes  bool is a built-in type   WIN32 is C code  not C    and C does not have a bool  so they provide their own typedef BOOL

User · Answer

Yes  C   supports bool and it is a data type  For reference - Bool data type

User · Answer

C is meant to be a step above assembly language  The C if-statement is really just syntactical sugar for  branch-if-zero   so the idea of booleans as an independent datatype was a foreign concept at the time   1   Even now  C C   booleans are usually little more than an alias for a single byte data type  As such  it s really more of a purposing label than an independent datatype    1  Of course  modern compilers are a bit more advanced in their handling of if statements  This is from the standpoint of C as a new language

User · Answer

Yes  C   supports bool and it is a data type  For reference - Bool data type

User · Answer

Allthough it s now a native type  it s still defined behind the scenes as an integer  int I think  where the literal false is 0 and true is 1  But I think all logic still consider anything but 0 as true  so strictly speaking the true literal is probably a keyword for the compiler to test if something is not false    if someval    true     probably translates to   if someval     false      e g  someval     0   by the compiler

User · Answer

C is meant to be a step above assembly language  The C if-statement is really just syntactical sugar for  branch-if-zero   so the idea of booleans as an independent datatype was a foreign concept at the time   1   Even now  C C   booleans are usually little more than an alias for a single byte data type  As such  it s really more of a purposing label than an independent datatype    1  Of course  modern compilers are a bit more advanced in their handling of if statements  This is from the standpoint of C as a new language

User · Answer

yes  it was introduced in 1993   for further reference  Boolean Datatype

User · Answer

C is meant to be a step above assembly language  The C if-statement is really just syntactical sugar for  branch-if-zero   so the idea of booleans as an independent datatype was a foreign concept at the time   1   Even now  C C   booleans are usually little more than an alias for a single byte data type  As such  it s really more of a purposing label than an independent datatype    1  Of course  modern compilers are a bit more advanced in their handling of if statements  This is from the standpoint of C as a new language

User · Answer

Turbo c and c   compiler does not support boolean  bool keyword  data type but dev c   compiler supports boolean   bool keyword  data type

User · Answer

C   does lots of automatic casting for you - that is  if you have a variable of type bool and pass it to something expecting an int  it will make it into an int for you - 0 for false and 1 for true   I don t have my standard around to see if this is guaranteed  but every compiler I ve used does this  so one can assume it will always work    However  relying on this conversion is a bad idea  Code can stop compiling if a new method is added that overloads the int signature  etc

User · Answer

Yes  bool is a built-in type   WIN32 is C code  not C    and C does not have a bool  so they provide their own typedef BOOL

User · Answer

C   does lots of automatic casting for you - that is  if you have a variable of type bool and pass it to something expecting an int  it will make it into an int for you - 0 for false and 1 for true   I don t have my standard around to see if this is guaranteed  but every compiler I ve used does this  so one can assume it will always work    However  relying on this conversion is a bad idea  Code can stop compiling if a new method is added that overloads the int signature  etc

User · Answer

Allthough it s now a native type  it s still defined behind the scenes as an integer  int I think  where the literal false is 0 and true is 1  But I think all logic still consider anything but 0 as true  so strictly speaking the true literal is probably a keyword for the compiler to test if something is not false    if someval    true     probably translates to   if someval     false      e g  someval     0   by the compiler

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