>>24
>>26

int a; <= これはどっち？ <--- declaration with simple-type-name
int main(){
int b; <= これはどっち？ <--- declaration with simple-type-name
}

Grammar of C++ Declarations
http://msdn.microsoft.com/library/ja/vclang/html/_pluslang_Grammar_of_C.2b2b_.Declarations.asp?frame=true