來吧，接下來是各個功能的函數的實現代碼。
首先，程序運行時加載讀入賬戶信息和航班信息。接下來就該讀取文件了。
我把賬戶資料和航班信息儲存在了.txt文件裡
那麼問題就來了，挖掘機...額，不對，應該怎麼讀入賬戶資料和航班信息？
每一行是結構體的一個成員，我讀入的方式是一行一行讀入。
兩個讀入函數代碼如下：
1 //讀入賬戶信息
2 BOOL ReadAccountData(HWND hwndDlg){
3
4 FILE *fp;
5
6 passenger = (Passenger *)malloc(sizeof(Passenger)); //為登錄賬戶分配內存
7 if (!passenger){
8 MessageBox(hwndDlg, TEXT("內存申請錯誤!"), TEXT("錯誤"), MB_OK | MB_ICONERROR);
9 EndDialog(hwndDlg, 0);
10 return FALSE;
11 }//if
12
13 psglink.head = NULL;
14 psglink.tail = NULL;
15 psglink.PsgNum = 0;
16
17 if ((fp = fopen(".\\AccountData.txt", "r+")) == NULL){ //打開文件
18 MessageBox(hwndDlg, TEXT("賬戶文件讀入錯誤!"), TEXT("錯誤"), MB_OK | MB_ICONERROR);
19 EndDialog(hwndDlg, 0);
20 }//if
21
22 while (!feof(fp)){
23 Passenger *p = (Passenger *)malloc(sizeof(Passenger));
24 if (!p){
25 MessageBox(hwndDlg, TEXT("內存申請錯誤!"), TEXT("錯誤"), MB_OK | MB_ICONERROR);
26 EndDialog(hwndDlg, 0);
27 return FALSE;
28 }//if
29
30 //讀入賬戶姓名、身份證號、密碼
31 if (fscanf(fp, "%s%s%s", p->Name, p->IdNum, p->PassWord) == EOF){
32 free(p); break;
33 }
34
35 p->Next = NULL;
36 if (psglink.head == NULL) //讀入第一個賬戶信息時，頭、尾結點均指向p
37 psglink.head = p;
38 else
39 psglink.tail->Next = p; //否則，尾結點Next指向p
40 psglink.tail = p; //尾結點指向p
41 psglink.PsgNum++; //已注冊賬戶個數
42
43 }//while
44 fclose(fp); //關閉文件
45 return TRUE;
46 }//ReadAccountData(HWND)
47
48
49 //讀入航班信息
50 BOOL ReadFlightData(HWND hwndDlg){
51
52 int flag = 0;
53 FILE *fp;
54
55 flightlink.Flight_Number = 0;
56 flightlink.head = NULL;
57 flightlink.tail = NULL;
58
59 if ((fp = fopen(".\\FlightData.txt", "r")) == NULL){ //打開文件
60 MessageBox(hwndDlg, TEXT("賬戶文件讀入錯誤!"), TEXT("錯誤"), MB_OK | MB_ICONERROR);
61 EndDialog(hwndDlg, 0);
62 }//if
63
64 while (!feof(fp)){
65 Flight *p = (Flight *)malloc(sizeof(Flight));
66 if (!p){
67 MessageBox(hwndDlg, TEXT("內存申請錯誤!"), TEXT("錯誤"), MB_OK | MB_ICONERROR);
68 EndDialog(hwndDlg, 0);
69 return FALSE;
70 }//if
71 //讀入航班信息
72 if (fscanf(fp, "%s%lf%s%d%d%s%s%s%s%s",
73 p->Flight_Number,
74 &p->Fare,
75 p->Discount,
76 &p->Seat_Number,
77 &p->Vacant_Seat,
78 p->Departure,
79 p->Destination,
80 p->Date,
81 p->TakeOff_Time,
82 p->Landing_Time) == EOF)
83 {
84 free(p);
85 break;
86 }
87 p->Next = NULL;
88 if (flightlink.head == NULL) //添加至鏈表
89 flightlink.head = p;
90 else
91 flightlink.tail->Next = p;
92 flightlink.tail = p;
93 flightlink.Flight_Number++;
94
95 }//while
96 fclose(fp); //關閉文件
97 return TRUE;
98 }//ReadFlightData()
因為開發環境是vs2013,所以編譯時會報錯，報錯信息是大體是說fopen()函數不安全，根據提示信息，解決辦法是在文件頭部做如下定義：
1 #define _CRT_SECURE_NO_WARNINGS
或者是在項目->屬性->c/c++->預處理器->預處理器定義，後面加上_CRT_SECURE_NO_WARNINGS就行了。
結下來又遇到問題了：程序退出把數據寫入txt文件時每行末尾都會有一個\n，讀入數據的時候用的是feof()函數，而feof()返回的其實是"最後一次讀操作的內容"，與數據庫中的eof()不同，eof()讀取的是當前指針位置。因此在讀到文件末尾的時候，程序會多執行一次循環，為了防止這種情況，我采取的是檢查fscanf()返回值的方法，在此以讀入賬戶資料時為例：
1 //讀入賬戶姓名、身份證號、密碼
2 if (fscanf(fp, "%s%s%s", p->Name, p->IdNum, p->PassWord) == EOF){
3 free(p); break;
4 }
然後是用戶登錄或注冊時所用到的函數：
1 //登陸用戶驗證
2 BOOL AccountLogIn(HWND hwndDlg){
3
4 int flag = 0; //flag！=0則該用戶已注冊，flag==0則該用戶尚未注冊
5 Passenger *p;
6
7 GetDlgItemText(hwndDlg, IDC_IDEDIT, passenger->IdNum, 256); //獲取用戶輸入ID
8 GetDlgItemText(hwndDlg, IDC_PSWEDIT, passenger->PassWord, 256); //獲取用戶輸入密碼
9
10 p = psglink.head;
11 while (p){ //在用戶鏈表查找登陸用戶ID
12 if (!lstrcmp(passenger->IdNum, p->IdNum)){
13 flag++; //該用戶已注冊
14 if (!lstrcmp(passenger->PassWord, p->PassWord)){ //密碼匹配，登陸成功
15 lstrcpy(passenger->Name, p->Name);
16 MessageBox(hwndDlg, TEXT("登陸成功，單擊確定進入程序主界面"), TEXT("登陸成功"), MB_OK | MB_ICONINFORMATION);
17 break;
18 }//if
19 else{ //密碼錯誤，退出循環
20 MessageBox(hwndDlg, TEXT("密碼錯誤，請重新輸入"), TEXT("密碼錯誤"), MB_OK | MB_ICONERROR);
21 return FALSE;
22 }//else
23 }//if
24 p = p->Next;
25 }//while
26 if (!flag){ //用戶尚未注冊
27 if (lstrlen(passenger->PassWord)==0)
28 MessageBox(hwndDlg, TEXT("請輸入密碼！"), TEXT("信息"), MB_OK | MB_ICONINFORMATION);
29 else
30 MessageBox(hwndDlg, TEXT("該賬戶尚未注冊，請先注冊"), TEXT("信息"), MB_OK | MB_ICONINFORMATION);
31 }//if
32 else{ //關閉登陸界面，彈出主界面
33 EndDialog(hwndDlg, TRUE);
34 if (ReadAccountOrder(hwndDlg, passenger)) //讀取用戶訂單
35 DialogBox(hInst, MAKEINTRESOURCE(IDD_MAINDLG), NULL, (DLGPROC)MainDlgProc);
36 }//else
37
38 return TRUE;
39 }//AccountLogIn(HWND)
1 //用戶注冊
2 BOOL AccountRegister(HWND hwndDlg){
3
4 GetDlgItemText(hwndDlg, IDC_IDEDIT, passenger->IdNum, 256); //獲取用戶輸入ID
5 GetDlgItemText(hwndDlg, IDC_PSWEDIT, passenger->PassWord, 256); //獲取用戶輸入密碼
6
7 if (lstrlen(passenger->PassWord) == 0){
8 MessageBox(hwndDlg, TEXT("請輸入注冊用戶密碼！"), TEXT("信息"), MB_OK | MB_ICONINFORMATION);
9 return FALSE;
10 }
11
12 DialogBox(hInst, MAKEINTRESOURCE(IDD_NAMEDLG), NULL, (DLGPROC)NameDlgProc); //獲取新注冊用戶姓名
13
14 if (lstrlen(passenger->Name) == 0)
15 return FALSE;
16
17 passenger->Next = NULL;
18
19 if (psglink.head == NULL) //該注冊賬戶為第一個賬戶時，頭、尾結點均指向passenger
20 psglink.head = passenger;
21 else
22 psglink.tail->Next = passenger; //將新注冊賬戶資料添加至賬戶鏈表
23 psglink.tail = passenger; //鏈表尾指針指向鏈表尾
24 psglink.PsgNum++; //注冊用戶數目加1
25 passenger->TicketNum = 0;
26 passenger->OrderLink.head = NULL; //乘客訂單鏈表初始化
27 passenger->OrderLink.tail = NULL;
28 passenger->OrderLink.OrderNum = 0;
29
30 MessageBox(hwndDlg, TEXT("注冊成功！請單擊確定進入主界面"), TEXT("注冊成功"), MB_OK | MB_ICONINFORMATION);
31
32 EndDialog(hwndDlg, TRUE); //關閉登陸界面
33
34 DialogBox(hInst, MAKEINTRESOURCE(IDD_MAINDLG), NULL, (DLGPROC)MainDlgProc); //彈出主界面
35
36 return TRUE;
37 }//AccountRegister(HWND)
點擊查找、訂票、退票、航班錄入、修改航班信息按鈕都會調用相應的函數。下面來看實現各個功能的代碼：
1 //查找航班
2 BOOL SearchFlight(HWND hMainDlg){
3 int flag1 = 0; //if(flag1==0) 出發地、目的地查詢航班，else：航班號查航班
4 int flag2 = 0;
5 Flight *p;
6 TCHAR szBuffer[256] = {TEXT("\0")};
7 TCHAR szDeparture[16], szDestination[16], szFltNum[16], szDate[16];
8
9 HWND hEdit = GetDlgItem(hMainDlg, IDC_INFORMATION);
10
11 GetDlgItemText(hMainDlg, IDC_DEPARTURE, szDeparture, 15); //獲取用戶輸入出發地
12 GetDlgItemText(hMainDlg, IDC_DESTINATION, szDestination, 15); //獲取用戶輸入目的地
13 GetDlgItemText(hMainDlg, IDC_FLIGHTNUM, szFltNum, 15); //獲取用戶輸入航班號
14 GetDlgItemText(hMainDlg, IDC_DATE, szDate, 15); //獲取用戶選擇航班時間
15
16 SetDlgItemText(hMainDlg, IDC_INFORMATION, szBuffer); //清空航班信息區域文本
17
18
19 if (lstrlen(szFltNum) || (!(lstrlen(szDeparture)) && !(lstrlen(szDestination))))
20 flag1++;
21 else if (!(lstrlen(szDeparture))){
22 MessageBox(hMainDlg, TEXT("請輸入出發地！"), TEXT("提示"), MB_OK | MB_ICONINFORMATION);
23 return FALSE;
24 }
25 else if (!(lstrlen(szDestination))){
26 MessageBox(hMainDlg, TEXT("請輸入目的地！"), TEXT("提示"), MB_OK | MB_ICONINFORMATION);
27 return FALSE;
28 }
29 if (flag1 && !(lstrlen(szFltNum))){
30 MessageBox(hMainDlg, TEXT("請輸入出發地、目的地或航班號以查詢航班！"), TEXT("提示"), MB_OK | MB_ICONINFORMATION);
31 return FALSE;
32 }
33
34 p = flightlink.head;
35 while (p){ //查找航班並輸出
36 if (flag1){ //按航班號查找
37 if (!lstrcmp(p->Flight_Number, szFltNum) && !lstrcmp(p->Date,szDate)){//查找到符合航班，輸出
38 if (!flag2){ //若該航班為第一班符合條件的航班
39 _stprintf(szBuffer, TEXT("航班號\t出發地\t目的地\t起飛時間\t降落時間\t余座\t價格\t折扣\t出發日期\n"));
40 SendMessage(hEdit, EM_SETSEL, LOWORD(-1), HIWORD(-1));
41 SendMessage(hEdit, EM_REPLACESEL, 0, (LPARAM)(szBuffer));
42 }//if
43 flag2++;
44 PrintFlight(hMainDlg, p); //輸出航班信息
45 }//if
46 }//if
47 else{ //按出發地、目的地查找
48 if (!lstrcmp(p->Departure, szDeparture) && !lstrcmp(p->Destination, szDestination) && !lstrcmp(p->Date, szDate)){//查找到符合航班，輸出
49 if (!flag2){ //若該航班為第一班符合條件的航班
50 _stprintf(szBuffer, TEXT("航班號\t出發地\t目的地\t起飛時間\t降落時間\t余座\t價格\t折扣\t出發日期\n"));
51 SendMessage(hEdit, EM_SETSEL, LOWORD(-1), HIWORD(-1));
52 SendMessage(hEdit, EM_REPLACESEL, 0, (LPARAM)(szBuffer));
53 }//if
54 flag2++;
55 PrintFlight(hMainDlg, p); //輸出航班信息
56 }//if
57 }//else
58 p = p->Next;
59 }//while
60 if (!flag2)
61 MessageBox(hMainDlg, TEXT("對不起，沒有符合您要求的航班"), TEXT("提示"), MB_OK | MB_ICONINFORMATION);
62 return TRUE;
63 }//SearchFlight()
1 //將所查航班信息輸出
2 BOOL PrintFlight(HWND hwndDlg,Flight *p){
3 TCHAR szBuffer[256];
4 HWND hEdit = GetDlgItem(hwndDlg, IDC_INFORMATION);
5
6 _stprintf(szBuffer, TEXT("\n%s\t%s\t%s\t%s\t%s\t%d\t%.2lf\t%s\t%s\n\n"),
7 p->Flight_Number, //航班號
8 p->Departure, //出發地
9 p->Destination, //目的地
10 p->TakeOff_Time, //起飛時間
11 p->Landing_Time, //降落時間
12 p->Vacant_Seat, //余座
13 p->Fare, //價格
14 p->Discount, //折扣
15 p->Date); //出發日期
16
17 SendMessage(hEdit, EM_SETSEL, LOWORD(-1), HIWORD(-1));
18 SendMessage(hEdit, EM_REPLACESEL, 0, (LPARAM)(szBuffer));
19
20 return TRUE;
21 }
1 //訂票
2 BOOL BookTickets(HWND hMainDlg){
3 int tickets_num;
4 Flight *p;
5 TCHAR szFltNum[16], szDate[16];
6
7 GetDlgItemText(hMainDlg, IDC_FLIGHTNUM, szFltNum, 15); //獲取用戶輸入航班號
8 GetDlgItemText(hMainDlg, IDC_DATE, szDate, 15); //獲取用戶選擇航班時間
9
10 if (!lstrlen(szFltNum)){
11 MessageBox(hMainDlg, TEXT("請輸入航班號以訂票！"), TEXT("提示"), MB_OK | MB_ICONINFORMATION);
12 return FALSE;
13 }
14
15 DialogBox(hInst, MAKEINTRESOURCE(IDD_FLTNUM), NULL, (DLGPROC)FlightNumDlgProc); //獲取訂票數目
16
17 if (!lstrlen(szBuffer))
18 return FALSE;
19
20 tickets_num = _ttoi(szBuffer); //訂票數目
21
22 p = flightlink.head;
23 while (p){ //查找航班並訂票
24 if (!lstrcmp(p->Flight_Number, szFltNum) && !lstrcmp(p->Date, szDate)) //查找到符合航班
25 _Book_Tickets(hMainDlg,p,tickets_num);
26 p = p->Next;
27 }//while
28 return TRUE;
29 }//BookTickets()
30
31
32 //訂票
33 BOOL _Book_Tickets(HWND hwndDlg,Flight *p,int Tickets_Num){
34 OrderForm *new_order = (OrderForm *)malloc(sizeof(OrderForm));
35 if (!new_order){
36 MessageBox(hwndDlg, TEXT("內存申請錯誤!"), TEXT("錯誤"), MB_OK | MB_ICONERROR);
37 return FALSE;
38 }
39
40 if (Tickets_Num > p->Vacant_Seat){ //余票不足，給出建議航班
41 Recommend(hwndDlg,p,Tickets_Num);
42 return FALSE;
43 }
44
45 new_order->Order_Number = ++allorder.AllOrderNum; //新訂單信息，總訂單數+1
46 new_order->Tickets_Num = Tickets_Num;
47 lstrcpy(new_order->IdNum, passenger->IdNum);
48 lstrcpy(new_order->Flight_Number, p->Flight_Number);
49 lstrcpy(new_order->Departure, p->Departure);
50 lstrcpy(new_order->Destination, p->Destination);
51 lstrcpy(new_order->Date, p->Date);
52 lstrcpy(new_order->TakeOff_Time, p->TakeOff_Time);
53 lstrcpy(new_order->Landing_Time, p->Landing_Time);
54 new_order->Next = NULL;
55 new_order->psgNext = NULL;
56
57 if (allorder.head == NULL) //將結點添至訂單鏈表末尾
58 allorder.head = new_order;
59 else
60 allorder.tail->Next = new_order;
61 allorder.tail = new_order;
62
63 if (passenger->OrderLink.head == NULL) //將結點添至用戶訂單鏈表末尾
64 passenger->OrderLink.head = new_order;
65 else
66 passenger->OrderLink.tail->psgNext = new_order;
67 passenger->OrderLink.tail = new_order;
68 passenger->OrderLink.OrderNum++;
69 passenger->TicketNum += Tickets_Num;
70
71 p->Vacant_Seat -= Tickets_Num; //航班余票-1
72
73 MessageBox(hwndDlg, TEXT("訂票成功！"), TEXT("提示"), MB_OK | MB_ICONINFORMATION);
74
75 return TRUE;
76 }//_Book_Tickets()
1 //給出建議航班
2 BOOL Recommend(HWND hwndDlg, Flight *p,int Tickets_Num){
3 SetDlgItemText(hwndDlg, IDC_INFORMATION, TEXT("\0")); //清空航班信息欄
4
5 int flag = 0;
6 TCHAR szBuffer[256] = {TEXT("\0")};
7 HWND hEdit = GetDlgItem(hwndDlg, IDC_INFORMATION);
8 Flight *q;
9
10 q = flightlink.head;
11 while (q){
12 if (!(lstrcmp(p->Departure, q->Departure)) &&
13 !(lstrcmp(p->Destination, q->Destination)) &&
14 lstrcmp(p->Flight_Number, q->Flight_Number) &&
15 Tickets_Num<=q->Vacant_Seat)
16 {
17 if (!flag){
18 wsprintf(szBuffer, TEXT("您所訂航班余票不足，以下為建議航班:\n"));
19 SendMessage(hEdit, EM_SETSEL, LOWORD(-1), HIWORD(-1));
20 SendMessage(hEdit, EM_REPLACESEL, 0, (LPARAM)(szBuffer));
21 wsprintf(szBuffer, TEXT("\n"));
22 SendMessage(hEdit, EM_SETSEL, LOWORD(-1), HIWORD(-1));
23 SendMessage(hEdit, EM_REPLACESEL, 0, (LPARAM)(szBuffer));
24 wsprintf(szBuffer, TEXT("航班號\t出發地\t目的地\t起飛時間\t降落時間\t余座\t價格\t折扣\t出發日期\n"));
25 SendMessage(hEdit, EM_SETSEL, LOWORD(-1), HIWORD(-1));
26 SendMessage(hEdit, EM_REPLACESEL, 0, (LPARAM)(szBuffer));
27 ++flag;
28 }//if
29 PrintFlight(hwndDlg, q);
30 }//if
31 q = q->Next;
32 }//while
33
34 if (!flag){
35 wsprintf(szBuffer, TEXT("對不起，您所訂航班余票不足，當天也其它沒有符合條件的航班...\n"));
36 SendMessage(hEdit, EM_SETSEL, LOWORD(-1), HIWORD(-1));
37 SendMessage(hEdit, EM_REPLACESEL, 0, (LPARAM)(szBuffer));
38 }
39 return TRUE;
40 }//Recommend()
1 //退票
2 BOOL ReturnTickets(HWND hwndDlg){
3 int flag = 0;
4 int num=0,tickets_num;
5 Flight *flight;
6 OrderForm *p,*q,*s,*prePoint;
7 TCHAR szFltNum[16], szDate[16];
8
9 GetDlgItemText(hwndDlg, IDC_FLIGHTNUM, szFltNum, 15); //獲取用戶輸入航班號
10 GetDlgItemText(hwndDlg, IDC_DATE, szDate, 15); //獲取用戶選擇航班時間
11
12 if (!lstrlen(szFltNum)){ //未輸入航班號
13 MessageBox(hwndDlg, TEXT("請輸入航班號！"), TEXT("提示"), MB_OK | MB_ICONINFORMATION);
14 return FALSE;
15 }
16
17 DialogBox(hInst, MAKEINTRESOURCE(IDD_FLTNUM), NULL, (DLGPROC)FlightNumDlgProc); //獲取退票數目
18
19 if (!lstrlen(szBuffer))
20 return FALSE;
21
22 tickets_num = _ttoi(szBuffer); //退票數
23
24 p = passenger->OrderLink.head;
25 prePoint = p;
26 if (!p){ //用戶無訂單
27 MessageBox(hwndDlg, TEXT("當前用戶沒有已訂票"), TEXT("提示"), MB_OK | MB_ICONINFORMATION);
28 return FALSE;
29 }
30
31 while (p){ //退票航班訂票總數
32 if (!lstrcmp(p->Flight_Number, szFltNum) && !lstrcmp(p->Date, szDate))
33 num += p->Tickets_Num;
34 p = p->psgNext;
35 }
36 if (tickets_num > num){ //退票數大於該航班已訂票數
37 wsprintf(szBuffer, TEXT("對不起，該航班您只訂了%d張機票，請重新填寫退票張數"), num);
38 MessageBox(hwndDlg, szBuffer, TEXT("提示"), MB_OK | MB_ICONINFORMATION);
39 return FALSE;
40 }//if
41
42 p = passenger->OrderLink.head;
43 while (p){ //退票
44 if (!lstrcmp(p->Flight_Number, szFltNum) && !lstrcmp(p->Date, szDate) ){
45 if (tickets_num >= p->Tickets_Num){ //當退票數大於等於當前訂單內票數
46
47 s = p->psgNext;
48 passenger->TicketNum -= p->Tickets_Num; //用戶訂票數減少
49 allorder.AllOrderNum--; //總訂單數減少
50 passenger->OrderLink.OrderNum--; //用戶訂單數減少
51 tickets_num -= p->Tickets_Num; //需要退票數減少 若需要退票數為0，則退出，否則繼續循環
52
53 if (passenger->OrderLink.head == p){ //若p為頭結點，刪除頭結點
54 passenger->OrderLink.head = p->psgNext; //頭指針指向下一個結點
55 if (!p->psgNext) //若p同時為尾結點，則尾指針指向NULL
56 passenger->OrderLink.tail = NULL;
57 }
58 else if (!p->psgNext) //若p非頭結點但為尾結點，尾指針指向前一個結點
59 passenger->OrderLink.tail = prePoint;
60 prePoint->psgNext = p->psgNext; //鏈表刪除結點p
61
62 flight = flightlink.head;
63 while (flight){ //航班余座增加
64 if (!lstrcmp(flight->Flight_Number, szFltNum) && !lstrcmp(flight->Date, szDate)){
65 flight->Vacant_Seat += p->Tickets_Num;
66 break;
67 }
68 flight = flight->Next;
69 }//while
70
71 q = allorder.head;
72 prePoint = q;
73 while (q){ //刪除訂單鏈表中訂單結點
74 if (q == p){ //找到訂單結點
75 if (allorder.head == p){ //若p為頭結點，刪除頭結點
76 allorder.head = p->Next; //頭指針指向下一個結點
77 if (!q->Next) //若q同時為尾結點，則尾指針指向NULL
78 allorder.tail = NULL;
79 }
80 else if (!q->Next) //若q非頭結點但為尾結點，尾指針指向前一個結點
81 allorder.tail = prePoint;
82 prePoint->Next = q->Next; //鏈表刪除結點q
83 free(p); break; //釋放p結點內存
84 }//if
85 prePoint = q;
86 q = q->Next;
87 }//while
88
89 if (tickets_num){ //若退票數非0，則繼續退票
90 p = s; continue;
91 }
92
93 MessageBox(hwndDlg, TEXT("退票成功！"), TEXT("提示"), MB_OK | MB_ICONINFORMATION);
94 return TRUE;
95 }//if
96 else{ //退票數小於該訂單訂票數
97 p->Tickets_Num -= tickets_num; //訂單訂票數減少
98 passenger->TicketNum -= tickets_num; //用戶訂票數減少
99
100 flight = flightlink.head;
101 while (flight){
102 if (!lstrcmp(flight->Flight_Number, szFltNum) && !lstrcmp(flight->Date, szDate)){
103 flight->Vacant_Seat += tickets_num; //航班余票增加
104 break;
105 }
106 flight = flight->Next;
107 }//while
108
109 MessageBox(hwndDlg, TEXT("退票成功！"), TEXT("提示"), MB_OK | MB_ICONINFORMATION);
110 return TRUE; //退票成功
111 }//else
112 }//if
113 prePoint = p;
114 p = p->psgNext;
115 }//while
116
117 wsprintf(szBuffer, TEXT("對不起，您沒有訂該航班機票，請確認退票航班"));
118 MessageBox(hwndDlg, szBuffer, TEXT("提示"), MB_OK | MB_ICONINFORMATION);
119 return FALSE;
120 }//ReturnTickets()
這篇文章就先到這裡吧，其余功能的實現以及頭文件、資源文件的代碼在下篇文章中給出。
