1  #include <locale.h>
       2  #include <stdint.h>
       3  #include <stdlib.h>
       4  #include <stdio.h>
       5  
       6  int
       7  main (void)
       8  {
       9    wchar_t wc;
      10  
      11    if (setlocale (LC_CTYPE, "de_DE.UTF-8") == NULL)
      12      {
      13        puts ("setlocale failed");
      14        return 1;
      15      }
      16  
      17    if (mbtowc (&wc, "\xc3\xa1", MB_CUR_MAX) != 2 || wc != 0xE1)
      18      {
      19        puts ("1st mbtowc failed");
      20        return 1;
      21      }
      22  
      23    if (mbtowc (&wc, "\xc3\xa1", SIZE_MAX) != 2 || wc != 0xE1)
      24      {
      25        puts ("2nd mbtowc failed");
      26        return 1;
      27      }
      28  
      29    return 0;
      30  }