title: warning: multi-character character constant [-Wmultichar]
body: <p>I want to have an Array of the Greek alphabet and this is what I do: </p>
  
  <pre><code>wchar_t pcletters[30] = {'α' , 'ά' , 'β' , 'γ' , 'δ' , 'ε' , 'ζ' , 'η', 'θ' , 'ι' , 'κ' , 'λ' , 'μ' , 'ν','ξ' , 'ο' , 'π' , 'ρ' , 'σ' , 'τ' , 'υ' , 'φ' , 'χ' , 'ψ' , 'ω', 'έ' , 'ή' , 'ί' , 'ό' , 'ύ' , 'ώ'} ;
  </code></pre>
  
  <p>I also include  <code>&lt;locale.h&gt;</code> and have a line <code>setlocale(LC_CTYPE, "") .</code></p>
  
  <p>However I get the warning  warning: multi-character character constant [-Wmultichar]. 
  Moreover when I get to check if one of this letters is in a user input by doing :</p>
  
  <pre><code>if (userword[i] == pcletters[j]) {//do stuff} 
  </code></pre>
  
  <p>it does not seem to work. 
  -Why do I get this warning ? 
  -Is there a way to change pcletters in a way to be able to compare 
  the <code>userword[i] == pcletters[j]</code> </p>
  
  <p>Note: <code>userword</code> is defined like this: <code>wchar_t userword[40]</code> .</p>