也可以采用以下形式: typedef struct int num; char name 9: char sex: struct f int year, month, day i birthday; float score 3; ISTUS STU pers 3 i 点专此处结束放殃 4合也可以采用以下形式： typedef struct { int num; char name[9]; char sex; struct { int year, month, day ;} birthday; float score[3]; }STU; STU pers[3];