String termination - char c=0 vs char c=''

Question

When terminating a string, it seems to me that logically char c=0 is equivalent to char c='', since the "null" (ASCII 0) byte is 0, but usually people tend to do '' instead. Is this purely out of preference or should it be a better "practice"?

What is the preferred choice?

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EDIT: K&R says: "The character constant '' represents the character with value zero, the null character. '' is often written instead of 0 to emphasize the character nature of some expression, but the numeric value is just 0.

Answer 1

http://en.wikipedia.org/wiki/Ascii#ASCII_control_code_chart

Binary   Oct  Dec    Hex    Abbr    Unicode  Control char  C Escape code   Name
0000000  000  0      00     NUL     ?       ^@                          Null character

There's no difference, but the more idiomatic one is ''.

Putting it down as char c = 0; could mean that you intend to use it as a number (e.g. a counter). '' is unambiguous.