why numeric arrays don't end with a '\0'.
14  1489 
why numeric arrays don't end with a '\0'.
Well, what is your guess?
Hint: how big are 90% of the numbers you use in an average day? How big are the sentences you use?
Hint: how big are 90% of the numbers you use in an average day? How big are the sentences you use?
Answer is four, and eleventy-two.
Zero is a valid number. If it means the end of the numeric array then you couldn't use zero for data. Not good.
In the case of chars, though, no char has a value of 0. OK, so why didn't they use 1 since no char has a value of 1. I don't know. I wasn't there at the time.
Zero is a valid number. If it means the end of the numeric array then you couldn't use zero for data. Not good.
In the case of chars, though, no char has a value of 0. OK, so why didn't they use 1 since no char has a value of 1. I don't know. I wasn't there at the time.
"\0" also stands for NULL. NULL is kind of a problem because it's this mythical creature that exists where it is supposed to be the "absence of data" but usually it is represented by zero. So in some cases NULL and 0 are used interchangeably and can cause problems. At a higher level NULL is not supposed to be a number or a letter, it's not supposed to be anything. So you might be running into that issue some time.
Yeah. Fortunately, there is no NULL in C++.
Yeah. Fortunately, there is no NULL in C++.
Fortunately?! I think not, kind sir!
why numeric arrays don't end with a '\0'.
You know all char, int etc stores as a number only. In case of Char, it is store as number called ascii value. Every character has some ascii value. Then you can make \0 as teminal point i.e. special ascii number. But In case of Integer, every number may be used . so there is no number left for idenfying termination. So You can'nt make \0 as terminal point in case of Integer,double( any Numeric data).
Asadullah Ansari
Fortunately?! I think not, kind sir!
Your C is showing.
C++ is another language.
Your C is showing.
C++ is another language.
Oh, how embarrassing, I'll zip that right up.
why numeric arrays don't end with a '\0'.
How does that make sense? First, \0 is a character. Second, why would numeric arrays need an End of data indicator?
"\0" also stands for NULL. NULL is kind of a problem because it's this mythical creature that exists where it is supposed to be the "absence of data" but usually it is represented by zero.
You confuse the null character with the NULL macro, which is an implementation defined constant. The null character, however, is defined by standard as the character '\0' sometimes refered to as NUL or the like.
Yeah. Fortunately, there is no NULL in C++.
I believe it is defined in C++. I have to dig out a draft of the standard to get the exact wording, but IIRC, NULL is an implementation defined constant expression, and that constant should evaluate to 0. It's preserved for C compatibility.
In C++, NULL is really an embarassing mess, with 0 being abused for the null pointer. I believe C++0x is trying to rectify this with an actual first class nullptr keyword and the like.
I think the null character of character strings was chosen to denote the end of a string of characters - in the sense of when developing the character string built-in functions, one must have a way of knowing when a character string ends.
When the null character is encountered, a program such as strlen knows when to stop counting, or strcat knows when to start catting, ...
An array of numbers ends when there are no more numbers.
There is no need to have a special character to tell a program when to stop.
An array of numbers ends when there are no more numbers.
Yes, but you can't check for "no more numbers". You must know the bounds of the array.
I believe it is defined in C++.
NULL is not a C++ keyword.
This is not to say that some kindly person has not stuck in a #define NULL 0 somewhere to keep old dogs happy.
NULL is not a C++ keyword.
No, it's not. It's a macro. I think it's defined in one of the C headers.
This is not to say that some kindly person has not stuck in a #define NULL 0 somewhere to keep old dogs happy.
Which is actually a technically wrong thing to do, because the definition of NULL is implementation specific. Technically it's a constant integral expression that eventually resolves to 0, so technically speaking, NULL isn't necessarily directly defined as 0. It's all a whole lot of awkwardness for C compatibility.
I don't want to go into a standards war, when we both agree on that NULL doesn't belong in modern C++ code. Scott Meyers indicated a null pointer idiom in one of his books; the code template should be Googleable.
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