Is 'tolower()' ANSI C ?

[Nobody/Anonymous]

Is ctype.h an ANSI C header?
I need to use 'tolower()'.

If it is not, which ANSI C function i could use instead of tolower?

Thank you!

[Curtis Sutter]

tolower() and toupper() are located in the iostream header with Dev 4.9.7.4 / gcc 3.2.

Curtis

[Nobody/Anonymous]

Thanks you, i decided to use ctype.h

Anyway i think it wont be necessary, i guess what i am trying to do is impossible:

char TempOcs[13];
if(strcmp((tolower(TempOcs)), "unnamed.ocs")==0) {
...
}

I guess tolower/toupper expect a single character not a string right?

[Nobody/Anonymous]

iostream with C? Isnt this only possible with C++?

[Curtis Sutter]

opps, you are right.  I use c++  :-P

Curtis

[Anonymous]

tolower() and toupper() are ANSI C. The header is ctype.h. They convert single characters only. Converting the case of a string is simple enough:

char* str_to_lower( char* string )
{
    char* ptr = string ;
    while( *ptr != 0 )
    {
        tolower( *ptr ) ;
        ptr++ ;
    }

    return( string ) ;
}

Returning string allows the function to be used as a parameter, like so:

if(strcmp((str_to_lower((TempOcs)), "unnamed.ocs")==0)
{
// etc.
}