btowc
From cppreference.com
                    
                                        
                    
                    
                                                            
                    |   Defined in header <wchar.h>
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|   wint_t btowc( int c );  | 
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Widens a single-byte character c to its wide character equivalent.
Most multibyte character encodings use single-byte codes to represent the characters from the ASCII character set. This function may be used to convert such characters to wchar_t.
Contents | 
[edit] Parameters
| c | - | single-byte character to widen | 
[edit] Return value
WEOF if c is EOF
wide character representation of c if (unsigned char)c is a valid single-byte character in the initial shift state, WEOF otherwise.
[edit] Example
| This section is incomplete Reason: no example  | 
[edit] See also
|    narrows a wide character to a single-byte narrow character, if possible  (function)  | |
|   C++ documentation for btowc 
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