以下结构体类型变量的定义错误的是( )。
A、#define STU struct student
STU {float height; int age; }std1;
B、struct student {float height; int age; }std1;
C、struct {float height; int age; }std1;
D、struct {float height; int age; }student;
struct student std1;
出自:西安交通大学--程序设计综合训练学习指南