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单项选择题
A.struct BOOK x= &book;
B.struct BOOK *x=&book;
C.struct BOOK x=calloc(BOOK);
D.struct BOOK *x=BOOK;
单项选择题
A.struct BOOK *x=malloc(book);
B.struct BOOK x={"C++ Programming",27.0};
C.struct BOOK *x=malloc(sizeof(struct BOOK));
D.struct BOOK *x=&book;
问答题