以下对结构体类型变量的定义中不正确的是（ ）。 A: B: define STUDENTstruct studentSTUDENT {int num; float age;}stdl; C: struct student{ int num; float age; }stdl; D: struct{ int num;float age; }std1; E: struct{ int num;floatage; }student;struct studentstd1;

对结构体类型变量定义不正确的是（ ）。 A: B: define STUDENT struct studentSTUDENT{char name;int num;}std; C: struct student{char name;int num;}stu; D: E: define struct student{char name;int num;}STD;STD stu; F: struct{char name;int num;}student;struct student stu;

以下对结构类型变量的定义中不正确的是（  ） 未知类型：{'options': ['#define STUDENT struct studentSTUDENT{int num;float age;}std1;', 'struct student{int num;float age;}std1;', 'struct student{int num;float age;float age;}std1;', 'struct student{int num;}student;struct student'], 'type': 102}