接下来的是录入航班、修改航班信息功能的实现：
//录入航班
BOOL EntryFlight(HWND hEntryDlg){ TCHAR szDiscount[];
TCHAR szFare[],szSeat_Number[];
TCHAR szFlight_Number[], szDate[];
TCHAR szDeparture[], szDestination[];
TCHAR szTakeOff_Time[], szLanding_Time[]; Flight *p = (Flight *)malloc(sizeof(Flight)),*q;
if (!p){
MessageBox(hEntryDlg, TEXT("内存申请错误!"), TEXT("错误"), MB_OK | MB_ICONERROR);
return FALSE;
} GetDlgItemText(hEntryDlg, IDC_DEPARTURE, szDeparture, ); //获取录入航班信息
GetDlgItemText(hEntryDlg, IDC_DESTINATION, szDestination, );
GetDlgItemText(hEntryDlg, IDC_FLTNUM, szFlight_Number, );
GetDlgItemText(hEntryDlg, IDC_FARE, szFare, );
GetDlgItemText(hEntryDlg, IDC_TAKEOFFTIME, szTakeOff_Time, );
GetDlgItemText(hEntryDlg, IDC_LANDINGTIME, szLanding_Time, );
GetDlgItemText(hEntryDlg, IDC_SEATNUM, szSeat_Number, );
GetDlgItemText(hEntryDlg, IDC_DISCOUNT, szDiscount, );
GetDlgItemText(hEntryDlg, IDC_DATE, szDate, ); if (!lstrlen(szDeparture) || !lstrlen(szDestination) ||
!lstrlen(szFlight_Number) || !lstrlen(szFare) ||
!lstrlen(szTakeOff_Time) || !lstrlen(szLanding_Time) ||
!lstrlen(szSeat_Number))
{
MessageBox(hEntryDlg, TEXT("请您填写完整航班信息！"), TEXT("提示"), MB_OK | MB_ICONINFORMATION);
return FALSE;
} q = flightlink.head;
while (q){
if (!lstrcmp(q->Flight_Number, szFlight_Number) && !lstrcmp(q->Date,szDate)){
MessageBox(hEntryDlg, TEXT("对不起，同一航班在一天内只能有一班"), TEXT("提示"), MB_OK | MB_ICONINFORMATION);
free(p);
return FALSE;
}
q = q->Next;
}//while lstrcpy(p->Date, szDate); //填入录入航班结点信息
lstrcpy(p->Discount, szDiscount);
lstrcpy(p->Departure, szDeparture);
lstrcpy(p->Destination, szDestination);
lstrcpy(p->TakeOff_Time, szTakeOff_Time);
lstrcpy(p->Landing_Time, szLanding_Time);
lstrcpy(p->Flight_Number, szFlight_Number);
p->Fare = _ttof(szFare);
p->Seat_Number = _ttoi(szSeat_Number);
p->Vacant_Seat = p->Seat_Number;
p->Next = NULL; if (flightlink.head == NULL) //将新结点添至航班链表
flightlink.head = p;
else
flightlink.tail->Next = p;
flightlink.tail = p;
flightlink.Flight_Number++; //航班数目增加 MessageBox(hEntryDlg, TEXT("航班录入成功！"), TEXT("提示"), MB_OK | MB_ICONINFORMATION); return TRUE;
}//EntryFlight()
//修改航班信息
BOOL ModifyFlight(HWND hModifyDlg){
int seat_num;
TCHAR szDiscount[];
TCHAR szFare[], szSeat_Number[];
TCHAR szTakeOff_Time[], szLanding_Time[];
TCHAR Mdf_flt_num[], Mdf_flt_date[]; OrderForm *q;
Flight *p; GetDlgItemText(hModifyDlg, IDC_MDFFLTNUM, Mdf_flt_num, ); //获取要修改的航班
GetDlgItemText(hModifyDlg, IDC_MDFDATE, Mdf_flt_date, ); if (!lstrlen(Mdf_flt_num)){
MessageBox(hModifyDlg, TEXT("请输入所要修改信息的航班号"), TEXT("信息"), MB_OK | MB_ICONINFORMATION);
return FALSE;
} GetDlgItemText(hModifyDlg, IDC_FARE, szFare, ); //获取要修改的信息
GetDlgItemText(hModifyDlg, IDC_DISCOUNT, szDiscount, );
GetDlgItemText(hModifyDlg, IDC_SEATNUM, szSeat_Number, );
GetDlgItemText(hModifyDlg, IDC_TAKEOFFTIME, szTakeOff_Time, );
GetDlgItemText(hModifyDlg, IDC_LANDINGTIME, szLanding_Time, ); p = flightlink.head;
while (p){ //查找要修改的航班
if (!lstrcmp(Mdf_flt_num, p->Flight_Number) && !lstrcmp(Mdf_flt_date, p->Date)){
if (lstrlen(szFare)) //改变航班票价
p->Fare = _ttof(szFare);
if (lstrlen(szDiscount)) //改变航班折扣
wsprintf(p->Discount, szDiscount);
if (lstrlen(szSeat_Number)){
seat_num = _ttoi(szSeat_Number);
if ((p->Seat_Number - seat_num) > p->Vacant_Seat){ //余座数量>=0
MessageBox(hModifyDlg, TEXT("对不起，座位数过少，请重新填写"), TEXT("提示"), MB_OK | MB_ICONINFORMATION);
return FALSE;
}
p->Vacant_Seat -= p->Seat_Number - seat_num; //改变余票数量
p->Seat_Number = seat_num; //改变座位数
}//if
if (lstrlen(szTakeOff_Time)){ //改变航班起飞时间
wsprintf(p->TakeOff_Time, szTakeOff_Time);
q = allorder.head; //改变该航班所有订单出发时间
while (q){
if (!lstrcmp(q->Flight_Number, p->Flight_Number) && !lstrcmp(q->Date, p->Date))
wsprintf(q->TakeOff_Time, szTakeOff_Time);
q = q->Next;
}
}//if
if (lstrlen(szLanding_Time)){ //改变航班降落时间
wsprintf(p->Landing_Time, szLanding_Time);
q = allorder.head; //改变该航班所有订单降落时间
while (q) {
if (!lstrcmp(q->Flight_Number, p->Flight_Number) && !lstrcmp(q->Date, p->Date))
wsprintf(q->Landing_Time, szLanding_Time);
q = q->Next;
}
}//if
MessageBox(hModifyDlg, TEXT("修改成功！"), TEXT("提示"), MB_OK | MB_ICONINFORMATION);
return TRUE;
}//if
p = p->Next;
}//while MessageBox(hModifyDlg, TEXT("对不起，您所要修改的航班尚未录入。"), TEXT("提示"), MB_OK | MB_ICONINFORMATION);
return FALSE; }//ModifyFlight()
至此，订票系统的功能已经基本全部实现了，剩下的问题就是在程序退出时将账户、航班、订单数据写进文件里。
具体实现起来很简单，需要注意的知识写入与读取要相对应。代码如下：
//保存账户资料
BOOL WriteAccountData(HWND hMainDlg){
Passenger *p;
FILE *fp;
if ((fp = fopen(".\\AccountData.txt", "w")) == NULL){
MessageBox(hMainDlg, TEXT("账户信息保存出现错误!"), TEXT("错误"), MB_OK | MB_ICONERROR);
return FALSE;
} p = psglink.head;
while (p){
fprintf(fp, "%s\n%s\n%s\n", p->Name, p->IdNum, p->PassWord);
p = p->Next;
}//while fclose(fp);
return TRUE;
}//WriteAccountData //保存订单信息
BOOL WriteOrderData(HWND hMainDlg){
OrderForm *p;
FILE *fp;
if ((fp = fopen(".\\OrderForm.txt", "w")) == NULL){
MessageBox(hMainDlg, TEXT("订单信息保存出现错误!"), TEXT("错误"), MB_OK | MB_ICONERROR);
return FALSE;
}
p = allorder.head;
while (p){
fprintf(fp, "%s\n", p->IdNum);
fprintf(fp, "%d\n", p->Order_Number);
fprintf(fp, "%d\n", p->Tickets_Num);
fprintf(fp, "%s\n", p->Flight_Number);
fprintf(fp, "%s\n", p->Departure);
fprintf(fp, "%s\n", p->Destination);
fprintf(fp, "%s\n", p->Date);
fprintf(fp, "%s\n", p->TakeOff_Time);
fprintf(fp, "%s\n", p->Landing_Time);
p = p->Next;
}//while
fclose(fp);
return TRUE;
}//WriteOrderData() //保存航班信息
BOOL WriteFlightData(HWND hMainDlg){
Flight *p;
FILE *fp;
if ((fp = fopen(".\\FlightData.txt", "w")) == NULL){
MessageBox(hMainDlg, TEXT("航班信息保存出现错误!"), TEXT("错误"), MB_OK | MB_ICONERROR);
return FALSE;
}
p = flightlink.head;
while (p){
fprintf(fp, "%s\n", p->Flight_Number);
fprintf(fp, "%.2lf\n", p->Fare);
fprintf(fp, "%s\n", p->Discount);
fprintf(fp, "%d\n%d\n", p->Seat_Number, p->Vacant_Seat);
fprintf(fp, "%s\n", p->Departure);
fprintf(fp, "%s\n", p->Destination);
fprintf(fp, "%s\n", p->Date);
fprintf(fp, "%s\n", p->TakeOff_Time);
fprintf(fp, "%s\n", p->Landing_Time);
p = p->Next;
}//while
fclose(fp);
return TRUE;
}//WriteFlight()
至此，这个飞机订票系统算是完成了，其中还是有很多不足之处。查找算法只是简单的遍历链表，数据结构也只是采用了单链表，倒是订单用上了十字链表来存储。查找起来效率不高，一旦数据量变大，便会很耗费时间，不过考虑到这只是一个课程设计，数据量很小，查找起来时间耗费上没有多少差别，姑且就这样吧。
把头文件以及其资源头文件代码就不贴出来了，想看的朋友可以直接把源码下载下来看一下。
