Where are strupr and strlwr?

[oontvoo]

In what library are the strupr() and strlwr() prototyped?

[kbw]

string.h

[1yR4jE8b]

I don't think either of those functions are part of the ANSI standard, so you might not have them depending on which compiler you are using.

[Duthomhas]

You can do your own easily enough:

C

#include <ctype.h>

char* stoupper( char* s )
  {
  char* p = s;
  while (*p = toupper( *p )) p++;
  return s;
  }

C++

#include <algorithm>
#include <cctype>
#include <functional>

std::string& stoupper( const std::string& s )
  {
  std::string result( s );
  std::transform(
    s.begin(),
    s.end(),
    result.begin(),
    std::ptr_fun <int, int> ( std::toupper )
    );
  return result;
  }

Etc. Hope this helps.