Need help on string manipulation

Hello, I'm currently learning string manipulation. I'm curious about
what is the favored way for string manipulation in C, expecially when
strings contain non-ASCII characters. For example, if substrings need
be replaced, or one character needs be changed, what shall I do? Is it
better to convert strings to UCS-32 before manipulation?

But on Windows, wchar_t is 16 bits which isn't enough for characters
which can't be simply encoded using 16 bits.

On Linux, I hear wchar_t is 32 bit. Maybe on Linux, strings can be
simply converted to wchar_t and then handle them without worrying? I'm
not sure.

What is a "good" way to handle all this mess? Are there any good
examples? I'll be very thankful for your help.

.

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