getting the size of a character array

[Dave Hague]

whats the fastest way to get the size of a character array? i thought
about just making a quick loop but 1) i dont know if thats the best way to
do it and 2) im not sure what my loop condition would be

thanks

[block111]

assuming that you know with what character your array ends all you need
is to check character by character until you find the terminating
character and then calculate the size of the array...
in case your caracter array is a simple c-string and it terminates with
'\0' the easiest way is to use strlen(your_char_array);

i thought about just making a quick loop but

Interesting, what's the quick loop you are talking about? I think they
all are quite quick :)

[Dave Hague]

just a loop such as:

for(int i = 0; not the end of the array; i++)
{
char x = array[i];
}

or something similar

On Mon, 25 Apr 2005 14:59:46 -0700, block111 wrote:

assuming that you know with what character your array ends all you need
is to check character by character until you find the terminating
character and then calculate the size of the array...
in case your caracter array is a simple c-string and it terminates with
'\0' the easiest way is to use strlen(your_char_array);

i thought about just making a quick loop but

Interesting, what's the quick loop you are talking about? I think they
all are quite quick :)

[block111]

if your array of things is not a simple cstring and it doesn't finish
with '\0' then
thing* begin = &array[0];
while(*begin != end_thing) ++begin;
cout << "array has " << (begin-&array[0]) << " things.";

where end_thing is the value of thing by which you identify the next
after the last element in you array of things

[CrayzeeWulf]

Dave Hague wrote:

whats the fastest way to get the size of a character array?

If it is really declared as a fixed sized array and not dynamically
allocated:

#include <iostream>

int
main()
{
char my_array[] = "blah blah" ;
const int MY_ARRAY_SIZE = sizeof(my_array)/sizeof(my_array[0]) ;
std::cout << "My array size: " << MY_ARRAY_SIZE << std::endl ;
return 0 ;
}

Notice that this will print:

My array size: 10

because the size of the array is 10 while that of the string "blah blah" is
9.

Thanks,
--
CrayzeeWulf

[Winbatch]

"Dave Hague" <ha***@cse.ohio-state.edu> wrote in message
news:pa****************************@cse.ohio-state.edu...

whats the fastest way to get the size of a character array? i thought
about just making a quick loop but 1) i dont know if thats the best way to
do it and 2) im not sure what my loop condition would be

thanks

If you're not storing any binary data, then it should already be null
terminated and you should be able to do a simple strlen( ) on it.

[Andrew Koenig]

"Dave Hague" <ha***@cse.ohio-state.edu> wrote in message
news:pa****************************@cse.ohio-state.edu...

whats the fastest way to get the size of a character array?

Remember what the size was when you created it.

How about telling us a little more about the problem you're trying to solve?