7. 定义一个结构体，下列结构体变量初始化正确的是（ ）

struct Student{

   int sno;

   char name[21];

   int age;

};

A.struct Student stu ={1,"fengjie",59};

B.struct Student stu1 =(struct Student)(1,"fengjie",59);

C.Student stu2 ={1,"fengjie",59};

D.Student stu3 = {structStudent}{1,"fengjie",59};

答案是D吗?

括号肯定是错的，应该是大括号