题目内容

When working with unions, typically a second variable keeps track of the current data type stored in the union.

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A. #define
B. typedef
C. set
D. union

A. typedef struct Date DATE;
B. typedef DATE struct Date;
C. #define struct Date DATE
D. #define DATE struct Date

A. struct (PayRecord employee)[10];
B. struct[10] PayRecord employee;
C. struct PayRecord[10] employee;
D. struct PayRecord employee[10];

A. employee.[0]rate
B. employee.rate[0]
C. employee[0].rate
D. (employee.rate)[0]