Possible Duplicate:
concatenation of two string literals
Case 1 "hello" "world" (NO ERROR)
Case 2 "hello"+"world" (ERROR)
I know that the + operator must atleat have one of its operand as string type,not string literal.
Thing is,both of the cases doesnt make sense,since we can include it into a single literal !
Why is Case 1 allowed then!
Case 1 is allowed because C++ basically considers adjacent literals to be the same literal, i.e. the code "hello" "world" is transformed into "helloworld" early on in the parsing.
Case 1, as you call it, is a convenient way to let string constants span several lines or be broken up into easily identified parts.
It's there to make your life easier.
Assuming that + should have the same semantics when used with string constants is a mistake. Especially in C, where string isn't an available type.
