新人乍到，求教大神，谢谢

Question

struct student stu1, stu2;/*It works*/
STUDENT stu1, stu2; /*It works!*/
student stu1, stu2; /*Can this work?*/
struct stu1, stu2; /*Can this work?*/
解释一下后两个；

Answer 1

编译器：抱歉，我不认识你，抱歉，你开错车了