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单选题
设有以下程序段:struct MP3{ char name[20]; char color; float price;}std,*ptr;ptr=&std;要引用结构体变量std中的color成员,下列写法中错误的是(  )。
A

std.color

B

ptr->color

C

std->color

D

(*ptr).color


参考答案

参考解析
解析:
结构体变量的引用两种方式:①用箭头操作符:“->”,其中操作数必须是指向结构的指针,右操作数是该结构的成员;②结构体变量名.成员名。C项,“std”是结构体变量名,应该使用“.”操作符来引用结构体成员。答案选择C选项。
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