【单选题】【消耗次数：1】
<img src=https://huaweicloudobs.ahjxjy.cn/7F4087B026D6F4BADEA518ED8648AFE7.png title=6-C.png alt=6-C.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/FD9E846B51A5615706F3A945B9906DE7.png title=6-1.png alt=6-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/F856EAFC58F1CA132023163A43A3B7F3.png title=6-2.png alt=6-2.png/>
③
2
④
-2
参考答案：
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随机题目
【单选题】
假定有“struct BOOK{char title[40];float price;} book;”，则正确的语句为（ ）。
①
struct BOOK x=
②
struct BOOK *x=
③
struct BOOK x=calloc(BOOK);
④
struct BOOK *x=BOOK;