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lang-c
\0"heee" is just like {'h', 'e', 'e', 'e', '\0'}str[j] = str[++j];. The C specification doesn't specify how the compiler should behave in this case (see c-faq.com/expr/evalorder1.html). Also doingi--is not a very wise thing to do in such constructions. In this caseiwill become negative in a lot of cases, andstr[-1]is clearly not valid here.