String Manipulation in C

[Sue Mitchell]

I am stuck with a problem here in trying to manipulate a string in C. What
I need to do is replace any occurance of "<" or ">" characters with "[["
and "]]" respectively. This is a piece of cake to do in VB or in Perl but
I haven't a clue how to do this in C. Please, please can anyone help me
here?

An example would be: <b>Welcome to my World.</b><i>Time to start</i>
would
end up looking like: []Welcome to my World.[][]Time to start[]

Sue

[jonnin]

copy from one string to another in a loop. when you find one of the special
tokens, copy the replacement over instead. end with 0 to null the c string.
string.h has some tools to get there (used here), the stl for c++ (you said
c) has better ones if you can use that.

heres the nasty c code...

dx = 0;
for(i = 0; i < strlen(string1); i++)
{
if (string1[i] == '<' )
{
string2[dx++] = '[';
string2[dx++] = '[';
}
else
if (string1[i] == '>' )
{
string2[dx++] = '>';
string2[dx++] = '>';
}
else
string2[dx++] = string1[i];


}
dx++;
string2[dx] = 0;


"Sue Mitchell" <sue.mitchell@cognos.com> wrote:
>
>I am stuck with a problem here in trying to manipulate a string in C. What
>I need to do is replace any occurance of "<" or ">" characters with "[["
>and "]]" respectively. This is a piece of cake to do in VB or in Perl but
>I haven't a clue how to do this in C. Please, please can anyone help me
>here?
>
>An example would be: <b>Welcome to my World.</b><i>Time to start</i>
>would
>end up looking like: []Welcome to my World.[][]Time to start[]
>
>Sue
>

[Sue Mitchell]

Thank you for your help, I had forgotten that strings are meerly an array
of characters in C. In trying your code however I get an unhandled exception
at the string2[dx++]=string1[i] line? I will continue to work on it but
I was wondering whether I was missing something.

Sue


"jonnin" <jonnin@vol.com> wrote:
>
>copy from one string to another in a loop. when you find one of the special
>tokens, copy the replacement over instead. end with 0 to null the c string.
> string.h has some tools to get there (used here), the stl for c++ (you
said
>c) has better ones if you can use that.
>
>heres the nasty c code...
>
>dx = 0;
>for(i = 0; i < strlen(string1); i++)
> {
> if (string1[i] == '<' )
> {
> string2[dx++] = '[';
> string2[dx++] = '[';
> }
>else
> if (string1[i] == '>' )
> {
> string2[dx++] = '>';
> string2[dx++] = '>';
> }
>else
> string2[dx++] = string1[i];
>
>
>}
>dx++;
>string2[dx] = 0;
>
>
>"Sue Mitchell" <sue.mitchell@cognos.com> wrote:
>>
>>I am stuck with a problem here in trying to manipulate a string in C.
What
>>I need to do is replace any occurance of "<" or ">" characters with "[["
>>and "]]" respectively. This is a piece of cake to do in VB or in Perl
but
>>I haven't a clue how to do this in C. Please, please can anyone help me
>>here?
>>
>>An example would be: <b>Welcome to my World.</b><i>Time to start</i>
>>would
>>end up looking like: []Welcome to my World.[][]Time to start[]
>>
>>Sue
>>
>

[jonnin]

I could have fooed that, but it looks ok to me. The idea was start dx at
0 and increment each time you add a letter to string2. String2 is bigger
than string1 (by 1 char every time string1 has a < or >. Did you run off
the end of a string? and did you set dx = 0? looks like I had > not ] in
the second loop, duh...

or did you get it, the email said yes and this said no...


"Sue Mitchell" <sue.mitchell@cognos.com> wrote:
>
>Thank you for your help, I had forgotten that strings are meerly an array
>of characters in C. In trying your code however I get an unhandled exception
>at the string2[dx++]=string1[i] line? I will continue to work on it but
>I was wondering whether I was missing something.
>
>Sue
>
>
>"jonnin" <jonnin@vol.com> wrote:
>>
>>copy from one string to another in a loop. when you find one of the special
>>tokens, copy the replacement over instead. end with 0 to null the c string.
>> string.h has some tools to get there (used here), the stl for c++ (you
>said
>>c) has better ones if you can use that.
>>
>>heres the nasty c code...
>>
>>dx = 0;
>>for(i = 0; i < strlen(string1); i++)
>> {
>> if (string1[i] == '<' )
>> {
>> string2[dx++] = '[';
>> string2[dx++] = '[';
>> }
>>else
>> if (string1[i] == '>' )
>> {
>> string2[dx++] = '>';
>> string2[dx++] = '>';
>> }
>>else
>> string2[dx++] = string1[i];
>>
>>
>>}
>>dx++;
>>string2[dx] = 0;
>>
>>
>>"Sue Mitchell" <sue.mitchell@cognos.com> wrote:
>>>
>>>I am stuck with a problem here in trying to manipulate a string in C.

>What
>>>I need to do is replace any occurance of "<" or ">" characters with "[["
>>>and "]]" respectively. This is a piece of cake to do in VB or in Perl
>but
>>>I haven't a clue how to do this in C. Please, please can anyone help
me
>>>here?
>>>
>>>An example would be: <b>Welcome to my World.</b><i>Time to start</i>
>>>would
>>>end up looking like: []Welcome to my World.[][]Time to start[]
>>>
>>>Sue
>>>
>>
>