I've written a rot13 conversion function.

/*
Produces the rot13 of one letter.
*/
char rot13_c(char ret)
{
if(ret > 'A'-1 && ret < 'N')
{ret += 13;}
else if(ret > 'M' && ret < 'Z'+1)
{ret -= 13;}
else if(ret > 'a'-1 && ret < 'n')
{ret += 13;}
else if(ret > 'm' && ret < 'z'+1)
{ret -= 13;}

return ret;
}

For some reason, it doesn't work unless I add a "printf()" statement between the final "else if" clause and the return.

/*
Produces the rot13 of one letter.
*/
char rot13_c(char ret)
{
if(ret > 'A'-1 && ret < 'N')
{ret += 13;}
else if(ret > 'M' && ret < 'Z'+1)
{ret -= 13;}
else if(ret > 'a'-1 && ret < 'n')
{ret += 13;}
else if(ret > 'm' && ret < 'z'+1)
{ret -= 13;}
printf("");
return ret;
}

Can anyone explain why this is happening??

On Wed, 3 Nov 2004 00:25:34 +0000 (UTC), kinghajj <kinghajj_member@pathlink.com> wrote:
> I've written a rot13 conversion function.
>
> /*
> Produces the rot13 of one letter.
> */
> char rot13_c(char ret)
> {
> if(ret > 'A'-1 && ret < 'N')
> {ret += 13;}
> else if(ret > 'M' && ret < 'Z'+1)
> {ret -= 13;}
> else if(ret > 'a'-1 && ret < 'n')
> {ret += 13;}
> else if(ret > 'm' && ret < 'z'+1)
> {ret -= 13;}
>
> return ret;
> }
>
> For some reason, it doesn't work unless I add a "printf()" statement between the
> final "else if" clause and the return.
>
> /*
> Produces the rot13 of one letter.
> */
> char rot13_c(char ret)
> {
> if(ret > 'A'-1 && ret < 'N')
> {ret += 13;}
> else if(ret > 'M' && ret < 'Z'+1)
> {ret -= 13;}
> else if(ret > 'a'-1 && ret < 'n')
> {ret += 13;}
> else if(ret > 'm' && ret < 'z'+1)
> {ret -= 13;}
> printf("");
> return ret;
> }
>
> Can anyone explain why this is happening??

No, but I have another clue, changin it to:

  char rot13_c(inout char ret)

causes it to start working also.

Regan

-- 
Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/

huh... that's strange. But, it works for me to.

In article <opsgu5capg5a2sq9@digitalmars.com>, Regan Heath says...
>
>On Wed, 3 Nov 2004 00:25:34 +0000 (UTC), kinghajj <kinghajj_member@pathlink.com> wrote:
>> I've written a rot13 conversion function.
>>
>> /*
>> Produces the rot13 of one letter.
>> */
>> char rot13_c(char ret)
>> {
>> if(ret > 'A'-1 && ret < 'N')
>> {ret += 13;}
>> else if(ret > 'M' && ret < 'Z'+1)
>> {ret -= 13;}
>> else if(ret > 'a'-1 && ret < 'n')
>> {ret += 13;}
>> else if(ret > 'm' && ret < 'z'+1)
>> {ret -= 13;}
>>
>> return ret;
>> }
>>
>> For some reason, it doesn't work unless I add a "printf()" statement
>> between the
>> final "else if" clause and the return.
>>
>> /*
>> Produces the rot13 of one letter.
>> */
>> char rot13_c(char ret)
>> {
>> if(ret > 'A'-1 && ret < 'N')
>> {ret += 13;}
>> else if(ret > 'M' && ret < 'Z'+1)
>> {ret -= 13;}
>> else if(ret > 'a'-1 && ret < 'n')
>> {ret += 13;}
>> else if(ret > 'm' && ret < 'z'+1)
>> {ret -= 13;}
>> printf("");
>> return ret;
>> }
>>
>> Can anyone explain why this is happening??
>
>No, but I have another clue, changin it to:
>
>   char rot13_c(inout char ret)
>
>causes it to start working also.
>
>Regan
>
>-- 
>Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/

On Wed, 3 Nov 2004 03:05:43 +0000 (UTC), kinghajj wrote:

> huh... that's strange. But, it works for me to.
> 
> In article <opsgu5capg5a2sq9@digitalmars.com>, Regan Heath says...
>>
>>On Wed, 3 Nov 2004 00:25:34 +0000 (UTC), kinghajj <kinghajj_member@pathlink.com> wrote:
>>> I've written a rot13 conversion function.
>>>
>>> /*
>>> Produces the rot13 of one letter.
>>> */
>>> char rot13_c(char ret)
>>> {
>>> if(ret > 'A'-1 && ret < 'N')
>>> {ret += 13;}
>>> else if(ret > 'M' && ret < 'Z'+1)
>>> {ret -= 13;}
>>> else if(ret > 'a'-1 && ret < 'n')
>>> {ret += 13;}
>>> else if(ret > 'm' && ret < 'z'+1)
>>> {ret -= 13;}
>>>
>>> return ret;
>>> }
>>>
>>> For some reason, it doesn't work unless I add a "printf()" statement
>>> between the
>>> final "else if" clause and the return.
>>>
>>> /*
>>> Produces the rot13 of one letter.
>>> */
>>> char rot13_c(char ret)
>>> {
>>> if(ret > 'A'-1 && ret < 'N')
>>> {ret += 13;}
>>> else if(ret > 'M' && ret < 'Z'+1)
>>> {ret -= 13;}
>>> else if(ret > 'a'-1 && ret < 'n')
>>> {ret += 13;}
>>> else if(ret > 'm' && ret < 'z'+1)
>>> {ret -= 13;}
>>> printf("");
>>> return ret;
>>> }
>>>
>>> Can anyone explain why this is happening??
>>
>>No, but I have another clue, changin it to:
>>
>>   char rot13_c(inout char ret)
>>
>>causes it to start working also.
>>
>>Regan
>>
>>-- 
>>Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/

Changing 'char' to 'int' also causes your original code to work.

-- 
Derek
Melbourne, Australia
3/11/2004 3:43:05 PM

In article <cm9nll$1bao$1@digitaldaemon.com>, Derek Parnell says...
>
>Changing 'char' to 'int' also causes your original code to work.
>
>-- 
>Derek
>Melbourne, Australia
>3/11/2004 3:43:05 PM

OK, I cleaned-up my code:

char rot13_c(int ret)
{
if(ret >= 'A' && ret <= 'M')
ret += 13;
else if(ret >= 'N' && ret <= 'Z')
ret -= 13;
else if(ret >= 'a' && ret <= 'm')
ret += 13;
else if(ret >= 'n' && ret <= 'z')
ret -= 13;

return ret;
}

still, I don't see why 'ret' needs to be int, but it works just fine.

It's definitely a compiler bug.

And I have it fixed now. Thanks!

In article <cmbbk8$7q8$1@digitaldaemon.com>, Walter says...
>
>And I have it fixed now. Thanks!
>
>
Cool, and thanks!
I guess I'll have to wait for v. 0.106

"kinghajj" <kinghajj_member@pathlink.com> wrote in message news:cmc012$1c7v$1@digitaldaemon.com...
> In article <cmbbk8$7q8$1@digitaldaemon.com>, Walter says...
> >
> >And I have it fixed now. Thanks!
> >
> >
> Cool, and thanks!
> I guess I'll have to wait for v. 0.106

You can workaround for the time being by making it an int parameter, or inserting a call to printf("");