[单选]  假定有“structBOOK{chartitle[40];floatprice;};structBOOKbook;”，则不正确的语句为（   ）。

A. struct BOOK x={“C++ Programming“,27.0}; B. struct BOOK *x=malloc(book); C. struct BOOK *x=malloc(sizeof(struct BOOK)); D. struct BOOK *x=&book;