Complex sentence: The string s4 contains the character "À" encoded into wchar_t, if the UTF-16 encoding is used, then s4 will also contain only a single wchar_t, 16 bits long, with numerical value 0x00C0.
Split into simpler sentences: The string s4 contains the character "À" encoded into wchar_t objects. If the UTF-16 encoding is used, then s4 will also contain only a single wchar_t, 16 bits long, with numerical value 0x00C0.