1
// 2結構通過指針綁鏈表依賴於其他的B是關係回到A
struct A_cust // customer information, a double-linked list with another pointer
{
char cust_info [20]; // as an example
A_cust *prevCust; // prev customer record
A_cust *nextCust; // next customer record
B_tran *point_to_B; // to the list of transaction records
};
struct B_tran // transaction records, a double-linked list with another pointer
{
char cust_tran [20]; // as an example
B_tran *prevTran; // prev customer transaction
B_tran *nextCust; // next customer transaction
A_cust *point_to_A // to the list of customer records
};
編譯器不知道「B_tran」,當它解析「A_cust」 如果我把定義「B_tran」的第一則編譯器根本不知道什麼是「A_cust」是
任何想法,歐內斯特
這就是所謂的向前聲明。 – gcochard