Thread: A few quick questions

Yes, writing the nth letter of a string (character array) is done by displaying str[n-1] (0 being the first letter, so nth letter is n-1).

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Mats

Ascii Table - ASCII character codes and html, octal, hex and decimal chart conversion

you can check each character if it belongs to uppercase range or lowercase range and branch accordingly

that means,
if you want to see if letter is uppercase or not

Code:

if(ch>=65 && ch<=90)
{
   //its upper case
}

another method is to use isupper() or islower() functions in ctype.h library

<ctype.h>

to print only nth letter you have to print element having its index as (n-1)

Originally Posted by creeping death

another method is to use isupper() or islower() functions

it is preffered method as it will work for any encoding even that has no sequential coding for characters

also - do not use magic numbers

Originally Posted by vart

it is preffered method as it will work for any encoding even that has no sequential coding for characters

also - do not use magic numbers

yes, you should define the range as something like

Code:

#define UPPER_START 65
#define UPPER_END 90

and then use UPPER_START and UPPER_END in place of actual numbers...

my bad.

just 'A' and 'Z' would do...

I'd suggest using the characters if you are going to do your own comparison:

Code:

if(ch>='A' && ch<='Z')
{
   //its upper case
}

That way, we don't have to look it up in the ASCII table to figure out what it is. And it has a remote chance of working even if the character encoding is NOT ASCII (although it presumes that all letters in the alphabet are in order [which it is in ASCII, and ALMOST in EBCDIC but there are gaps in EBCDIC].

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Mats

Or just use isalpha() from ctype.h that way it doesn't matter at all

Originally Posted by zacs7

Or just use isalpha() from ctype.h that way it doesn't matter at all

islower or isupper if you want to check if it's lower/upper case - yes, that'll work for BOTH ASCII and EBCDIC along with any other character encoding where the compiler/library supports standard C functions.

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Mats

Hey.. thanks alot.. but as I'm very new, I'm having trouble adding a string of variable length to said array...


The idea is to be able so print, say the capitals, the lowercase and the integers in a given string, all of different lines

Thanks,
Brodie.

Originally Posted by Brodie337

Hey.. thanks alot.. but as I'm very new, I'm having trouble adding a string of variable length to said array...


The idea is to be able so print, say the capitals, the lowercase and the integers in a given string...

Thanks,
Brodie.

string basically is an array of chars - so you can assign it char by char... just add the nul-character at the end.

if you need the more complex formating - read about sprintf

Allright... I can get a string of characters into an array... Now I need to get the capitals out of said array...
What I'm using looks like this:

Code:

    while (isupper (msg))
        putchar(out[j++]);

But I get the error message when colpiling:

Code:

In function `int main()':|
error: invalid conversion from `char*' to `int'|
error:   initializing argument 1 of `int isupper(int)'|

Can someone shed some light on this?