Iv'e seen this many times (or something similar).
But isn't a char unsigned by default?Code:#define BYTE unsigned char
Iv'e seen this many times (or something similar).
But isn't a char unsigned by default?Code:#define BYTE unsigned char
6.2.5.15 http://www.open-std.org/jtc1/sc22/wg...69/n869.pdf.gz
Edit: Wow 4000 posts. And to think Janurary of 2004 I barely had 1000.The three types char, signed char, and unsigned char are collectively called
the character types. The implementation shall define char to have the same range,
representation, and behavior as either signed char or unsigned char.32)
32) CHAR_MIN, defined in <limits.h>, will have one of the values 0 or SCHAR_MIN, and this can be
used to distinguish the two options. Irrespective of the choice made, char is a separate type from the
other two and is not compatible with either.
Hello,
If the value of an object of type char is treated as a signed integer when used in an expression, the value of CHAR_MIN shall be the same as that of SCHAR_MIN and the value of CHAR_MAX shall be the same as that of SCHAR_MAX. Otherwise, the value of CHAR_MIN shall be 0 and the value of CHAR_MAX shall be the same as that of UCHAR_MAX.Code:Definition Type Value SCHAR_MIN signed char -127 SCHAR_MAX signed char +127 UCHAR_MAX unsigned char 255 CHAR_MIN char "see below" CHAR_MAX char "see below"
Edit:
- Stack Overflow
Segmentation Fault: I am an error in which a running program attempts to access memory not allocated to it and core dumps with a segmentation violation error. This is often caused by improper usage of pointers, attempts to access a non-existent or read-only physical memory address, re-use of memory if freed within the same scope, de-referencing a null pointer, or (in C) inadvertently using a non-pointer variable as a pointer.
> But isn't a char unsigned by default?
Nope - an unqualified char may be either signed or unsigned.
And using #define to create a new type is pointless when typedef is both more capable, and safer.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
Thanks. It couldn't be any clearer.
Actually it could be clearer. The values Stack Overflow gave you were the "minimums". The standard defines that the character data types have those minimum values. That is to say, it's perferctly legal as far as ANSI goes, to have a char type whose minimum value is ... wait a minute! Holy Deja Vu Batman!
Originally Posted by quzah
Quzah.
Hope is the first step on the road to disappointment.
Thanks Quzah.