ｅｒｒｏｒ，求教

typedef struct Guest_fi{
    Guest_fi(){
        name = new char[20];
        code = new char[7];
        all_citys = new char[11] ;
        New_ch = new CHANGE[2];
        PP = new Now_state[N];
        for(int i = 0 ; i < N ;++i)
        {    PP[i].mid_city = new char[N - 1];
            PP[i].vech = new char[N - 1];
            PP[i].ar_T = -1;
            PP[i].st_T = -1 ;
        }
        fill(all_citys , all_citys + 10 , '\0');
        fill(name , name + 19 , '\0');
        fill(code , code + 6 , '\0');
        choice = '0';
        tt = 1111111111 ;
        start_time = -1 ;
    }
    char* name;
    char* code;
    char* all_citys ;
    char  choice ;
    int  start_time ;
    time_t tt;
    CHANGE * New_ch;
    Now_state * PP;
    struct Guest_fi*nextPtr;
}GF;
橙色部分的结构是在另外一个头文件中定义的,编译报错,PP未声明,
而ＣＨＡＮＧＥ结构是在ＧＦ上方定义，就没有报错．