Was just thinking it a bit further: Do you have a non pre-compiled string?
Aka:

char * OrigString =3D "This\\tis\\rinteresting";  ?

(notice the double backslashes)

Then you probably would need a conversion function, similar to this:

    char *o =3D OrigStr;
    char *s =3D StringBuf;
    while ( *o ) {
        char c =3D *o++;
        if ( c =3D=3D '\\' ) {
            c =3D *o++;
            switch(c) {
                case '\0': break;
                case 't': c =3D '\t'; break;
                case 'n': c =3D '\r'; break;
                case 'r': c =3D '\n'; break;
                case 'a': c =3D '\a'; break;
                default: break;
            }

            *s++ =3D c;
        }
    }
    *s =3D '\0';

(have not tested and it is definitely _unsafe_ -- for illustration purpose
only)

Tamas



On 13 May 2013 22:55, Tamas Rudnai <tamas.rudnai@gmail.com> wrote:

> Have you tried in this way:
>
> sprintf(StringBuf, "%s", OriginalString);
>
> Tamas
>
>
> On 13 May 2013 20:06, Harold Hallikainen <harold@hallikainen.org> wrote:
>
>> I have a string, defined at run time, that includes standard printf esca=
pe
>> sequences (such as \t and \r). I'd like to change these back to tab and
>> carriage return. I tried using sprintf(StringBuf,OriginalString), but th=
is
>> just copied OriginalString to StringBuf without expanding the escape
>> sequences. I note that the "format string" is defined as const char, so =
I
>> guess it is evaluated at compile time instead of run time (especially to
>> deal with a variable number of % substitutions). So, is there a standard
>> function to expand out the escape sequences in a run-time defined string=
?
>> Or do I have to write my own?
>>
>> THANKS!
>>
>> Harold
>>
>>
>>
>> --
>> FCC Rules Updated Daily at http://www.hallikainen.com - Advertising
>> opportunities available!
>> Not sent from an iPhone.
>> --
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>> http://mailman.mit.edu/mailman/listinfo/piclist
>>
>
>
>
> --
> int main() { char *a,*s,*q; printf(s=3D"int main() { char *a,*s,*q;
> printf(s=3D%s%s%s, q=3D%s%s%s%s,s,q,q,a=3D%s%s%s%s,q,q,q,a,a,q); }",
> q=3D"\"",s,q,q,a=3D"\\",q,q,q,a,a,q); }
>



--=20
int main() { char *a,*s,*q; printf(s=3D"int main() { char *a,*s,*q;
printf(s=3D%s%s%s, q=3D%s%s%s%s,s,q,q,a=3D%s%s%s%s,q,q,q,a,a,q); }",
q=3D"\"",s,q,q,a=3D"\\",q,q,q,a,a,q); }
--=20
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.