JdBP>> Or, idiomatically :
 JdBP>>         char ch ;
 JdBP>>         char str[2] = { ch } ;
 MB> does that guarantee that str[1] == 0 ?
Yes.  In an aggregate initialiser, missing initialisers for individual 
members of the aggregate imply zero initialisation.  As I said to Thomas, see 
sections 8.5 and 8.5.1 (especially paragraph 7) of the C++ Standard.
 ¯ JdeBP ®
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