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string setup

in a c-module I found the definition of a string:

char acString[20] = "";

For me the initilisation looks a little bit unusual.

My questions at this point are:
- is this allowed in ansi-c?
- what happens? Is only acString[0] set to 0x00
or is the whole string set to zero similar
to memset(acString,0,20)?
- can I be shure that in futur versions of C166
the compiler always treats this in the same manner?

Thank you
...Leo

0 Andrew Neil over 24 years ago
It's perfectly valid.

If you're worried, you could explicitly initialise the whole thing:

char acString[20] = {0,0,0,0,0, 0,0,0,0,0, 0,0,0,0,0, 0,0,0,0,0};

You might also want to make it unsigned?
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0 Mark Odell over 24 years ago
More typical is:

char acString[20] = { 0 };

- Mark
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