bool and BOOL
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if you're coding in C,
booljust don't exist (I prefer mention it, even it's obvious). in C++,boolis a native type. it weights 1 byte and takes the values0_b_0000000**1**(true) or0_b_0000000**0**(false). you can assign an integer to abool. if it is different from0, it equals the value "true", and will be automatically converted into0_b_0000000**1**anyway.BOOLis different. it is anenumtype inherited from the old C days. it's definition is like this :enum BOOL {
FALSE = 0,
TRUE
};An
enumis actually anint, which mean it weights 4 bytes (on a 32 bits system). apparently, Microsoft implements it in a different manner, so you have to be much more careful with it. for instance ://if defined like this :
typedef int BOOL;//this can be a mistake :
BOOL b = 4;
if (b == true) {
//never enters here
// because 4 != 1
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modified on Tuesday, May 20, 2008 9:50 AM
toxcct wrote:
BOOL is different. it is an enum type inherited from the old C days. it's definition is like this : enum BOOL { FALSE = 0, TRUE };
Where did you get this information from? Under Windows,
BOOLis defined as an integer inWindef.hNobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP
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CPallini wrote:
typedef int BOOL
not really maybe :cool:
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toxcct wrote:
not really
You've gotta be kidding me. CPallini is correct.
Nobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP
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CPallini wrote:
typedef int BOOL
not really maybe :cool:
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Maybe both my local help and my
windef.hfile are wrong?If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke -
toxcct wrote:
BOOL is different. it is an enum type inherited from the old C days. it's definition is like this : enum BOOL { FALSE = 0, TRUE };
Where did you get this information from? Under Windows,
BOOLis defined as an integer inWindef.hNobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP
humm, it was in the C days... but anyway, an
enumis anint[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]
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if you're coding in C,
booljust don't exist (I prefer mention it, even it's obvious). in C++,boolis a native type. it weights 1 byte and takes the values0_b_0000000**1**(true) or0_b_0000000**0**(false). you can assign an integer to abool. if it is different from0, it equals the value "true", and will be automatically converted into0_b_0000000**1**anyway.BOOLis different. it is anenumtype inherited from the old C days. it's definition is like this :enum BOOL {
FALSE = 0,
TRUE
};An
enumis actually anint, which mean it weights 4 bytes (on a 32 bits system). apparently, Microsoft implements it in a different manner, so you have to be much more careful with it. for instance ://if defined like this :
typedef int BOOL;//this can be a mistake :
BOOL b = 4;
if (b == true) {
//never enters here
// because 4 != 1
}[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]
modified on Tuesday, May 20, 2008 9:50 AM
toxcct wrote:
0x00000001 (true) or 0x00000000 (false).
Uhmmmmmmmmmmm. Never seen a byte having so much hex digits...:-D
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke -
humm, it was in the C days... but anyway, an
enumis anint[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]
I was just asking where was
BOOLdefined as anenum. Since the C days, BOOL is an int and even the latest Windows SDK, it is so, to have C compatibility. I have never seen BOOL being defined as an enum in the Windows world.Nobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP
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I was just asking where was
BOOLdefined as anenum. Since the C days, BOOL is an int and even the latest Windows SDK, it is so, to have C compatibility. I have never seen BOOL being defined as an enum in the Windows world.Nobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP
Rajesh R Subramanian wrote:
in the Windows world.
man, we are not alone ! ;P
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toxcct wrote:
0x00000001 (true) or 0x00000000 (false).
Uhmmmmmmmmmmm. Never seen a byte having so much hex digits...:-D
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarkewhat ????? doesn't a Byte having 8 bits ?
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toxcct wrote:
0x00000001 (true) or 0x00000000 (false).
Uhmmmmmmmmmmm. Never seen a byte having so much hex digits...:-D
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke -
what ????? doesn't a Byte having 8 bits ?
[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]
But it hasn't 8 hexadecimal digits. I.e. I was kidding about your binary numbers prefixed like hexadecimal ones. :)
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke -
But it hasn't 8 hexadecimal digits. I.e. I was kidding about your binary numbers prefixed like hexadecimal ones. :)
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarkeyou're right, i fixed it.
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Maybe both my local help and my
windef.hfile are wrong?If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain ClarkeMay be toxcct is on drugs today for a change. :laugh:
Nobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP
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May be toxcct is on drugs today for a change. :laugh:
Nobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP
Rajesh R Subramanian wrote:
May be toxcct is on drugs today for a change
come on, have you ever worked under linux ? Microsoft IS NOT the standard, even if 85% of the PCs worldwide are windows based... :doh:
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what ????? doesn't a Byte having 8 bits ?
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toxcct wrote:
doesn't a Byte having 8 bits
Yes, so it is coded 0x00 to 0xFF (hexa representation) or 0b00000000 to 0b11111111 (binary representation).
Cédric Moonen Software developer
Charting control [v1.4] -
Rajesh R Subramanian wrote:
May be toxcct is on drugs today for a change
come on, have you ever worked under linux ? Microsoft IS NOT the standard, even if 85% of the PCs worldwide are windows based... :doh:
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toxcct wrote:
come on, have you ever worked under linux ?
Yes, why?
toxcct wrote:
Microsoft IS NOT the standard, even if 85% of the PCs worldwide are windows based... [D'Oh!]
So, I don't get the point here. I have worked on development projects on fedora, debian and ubuntu. Linux does not have a BOOL datatype as far as I know. I say - BOOL belongs to Windows. Comments?
Nobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP
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if you're coding in C,
booljust don't exist (I prefer mention it, even it's obvious). in C++,boolis a native type. it weights 1 byte and takes the values0_b_0000000**1**(true) or0_b_0000000**0**(false). you can assign an integer to abool. if it is different from0, it equals the value "true", and will be automatically converted into0_b_0000000**1**anyway.BOOLis different. it is anenumtype inherited from the old C days. it's definition is like this :enum BOOL {
FALSE = 0,
TRUE
};An
enumis actually anint, which mean it weights 4 bytes (on a 32 bits system). apparently, Microsoft implements it in a different manner, so you have to be much more careful with it. for instance ://if defined like this :
typedef int BOOL;//this can be a mistake :
BOOL b = 4;
if (b == true) {
//never enters here
// because 4 != 1
}[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]
modified on Tuesday, May 20, 2008 9:50 AM
toxcct wrote:
if you're coding in C, bool just don't exist
It did not exist in C89, but exists in C99[^]
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toxcct wrote:
doesn't a Byte having 8 bits
Yes, so it is coded 0x00 to 0xFF (hexa representation) or 0b00000000 to 0b11111111 (binary representation).
Cédric Moonen Software developer
Charting control [v1.4]yes yes, fixed already ;)
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Rajesh R Subramanian wrote:
May be toxcct is on drugs today for a change
come on, have you ever worked under linux ? Microsoft IS NOT the standard, even if 85% of the PCs worldwide are windows based... :doh:
[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]
toxcct wrote:
have you ever worked under linux
What kind of drug is that ? ;P
Cédric Moonen Software developer
Charting control [v1.4] -
toxcct wrote:
have you ever worked under linux
What kind of drug is that ? ;P
Cédric Moonen Software developer
Charting control [v1.4]Cedric Moonen wrote:
What kind of drug is that ?
i'd better give up there ! lol
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hai all, about 'bool' i got idea... from all ur replies... but what about BOOL..? i am not clear...
Born to win...!
modified on Tuesday, May 20, 2008 11:57 PM
BOOL is fully featured integer, for instance, you can do.
// WEIRD BOOL (legal) programming
BOOL b;
b = 1000;
b++;You can't do the same with a
boolvariable. [added] Well, I made a sanity check, and actuallyVC++compiler gives just a warning on the following codebool b;
b = 1000; // Warning here (loss of info), at runtime b becomes true.
b++; // at runtime b remains true.[/added] As stated by someone (Rajesh ? toxcct?) this is a reminiscence of the
Clanguage gold ol days (Chas not theboolkeyword). Using anintto representYes/Nopair is simply a matter of convention (and convenience). :)If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
