How to realize Air ticket booking system with C language
7) {printf ("- Please enter the correct departure time (1-7 from Monday to Sunday):";} else {ahead- > time = time; break;}} aend = ahead Aend- > next = NULL;} else {printf ("- Please enter flight number (return by 0):"); getchar (); while (gets (airlinenum)) {if (strcmp (airlinenum, "0") = = 0) {return } if (strlen (airlinenum) airlinenum,airlinenum) = = 0) {flag = 1; break;} p = p-> next;} if (flag = = 1) {int ticks Printf ("- Please enter the number of tickets to be increased:"); while (scanf ("% d", & ticks)) {if (ticks 999) {printf ("- Please enter the number of tickets within 0-999!") ;} else {p-> ticks + = ticks; printf ("- flight number% s votes added successfully!" , p-> airlinenum); break;} else {p = (airline*) malloc (sizeof (airline)); strcpy (p-> airlinenum,airlinenum); printf ("- Please enter plane number:"); long long int airplanenum While (scanf ("% lld", & airplanenum)) {if (airplanenum 999999) {printf ("- Please enter a plane number with a length of 1-6 digits:");} else {p-> airplanenum = airplanenum; break }} printf ("- Please enter the place of departure:"); getchar (); char dep [1000]; while (gets (dep)) {if (strlen (dep) dep,dep); break } else {printf ("- Please enter a place of departure with a length of 1 to 16 digits:");}} printf ("- Please enter a destination:"); char des [1000] While (gets (des)) {if (strlen (des) des,des); break;} else {printf ("- Please enter a destination with a length of 1 to 16 bits:") }} printf ("- Please enter the number of tickets:"); int ticks; while (scanf ("% d", & ticks)) {if (ticks)
< 0) { printf("-------------请输入正确格式的机票数！"); } else if (ticks >) {printf ("- Please enter the number of tickets within 0-999!") ;} else {p-> ticks = ticks; break;}} int time; printf ("- Please enter the departure time (1-7):"); while (scanf ("% d", & time)) {if (time)
< 1 || time >7) {printf ("- Please enter the correct departure time (1-7 from Monday to Sunday);} else {p-> time = time; break;}} getchar (); aend- > next = p Aend = p; aend- > next = NULL;}} acnt + +; writefile (2); cls (); printf ("\ n\ n"); printf ("\ t\ t *\ n") Printf ("\ t\ t *\ n"); printf ("\ t\ t flight number% s added successfully!\ n", aend- > airlinenum); printf ("\ t\ t *\ n") Printf ("\ t\ t *\ n"); printf ("the page is about to jump..."); Sleep (2000);} void writefile (int flag) / / 0 write user 1 write administrator 2 write flight {user * userp = uhead; manger * mangerp = mhead; airline * airlinep = ahead; FILE * fp If (flag = = 0) {fp = fopen ("user", "w"); while (userp) {fwrite (userp,sizeof (user), 1mai FP); userp = userp- > next;}} else if (flag = = 1) {fp = fopen ("manger", "w") While (mangerp) {fwrite (mangerp,sizeof (manger), 1Magne FP); mangerp = mangerp- > next;}} else if (flag = = 2) {fp = fopen ("airline", "w"); while (airlinep) {fwrite (airlinep,sizeof (airline), 1Magne FP); airlinep = airlinep- > next } fclose (fp);} void deletenum () {airline * p, * sign; p = ahead; char airlinenum [1000]; int flag = 0; FILE * fp; fp = fopen ("airline", "r"); char ch; ch = fgetc (fp); rewind (fp); if (ch = = EOF) {printf ("\ n\ n") Printf ("- No flight information yet!") ; getchar (); printf ("pause"); return;} printf ("- Please enter the flight number you want to delete (press 0 to exit):"); while (scanf ("% s", airlinenum)) {if (strcmp ("0", airlinenum) = = 0) {getchar (); return } while (p) {if (strcmp (p-> airlinenum,airlinenum) = = 0) {flag = 1; break;} p = p-> next } if (flag = = 0) {printf ("- check no such flight!") ; printf ("Please re-enter (exit by 0):"); p = ahead;} else {break;}} deleteusernum (airlinenum); p = ahead; if (strcmp (ahead- > airlinenum,airlinenum) = = 0) {sign = ahead; strcpy (sign- > airlinenum,ahead- > airlinenum); ahead = ahead- > next Ahead1- > next = ahead;} while (p-> next! = NULL) {if (strcmp (p-> next- > airlinenum,airlinenum) = = 0) {sign = p-> next; strcpy (sign- > airlinenum,p- > next- > airlinenum); p-> next = p-> next- > next; break;} p = p-> next;} getchar () Printf ("\ n\ n"); printf ("- flight number% s deleted successfully! \ n ", sign- > airlinenum); printf ("-the page is about to jump... "); Sleep (1000); / / free (sign); writefile (2);} void deleteusernum (char * airlinenum) {user * userp = uhead; int flag; while (userp) {flag = 1; for (int I = 0; I)
< userp->Bookcnt; I + +) {if (strcmp (userp- > bookticks [I], airlinenum) = = 0) {flag = I; break;}} if (flag! = 1) {for (int j = flag; j)
< userp->Bookcnt-1; j + +) {strcpy (userp- > bookticks [j], userp- > bookticks [j + 1]);} userp- > bookcnt -;} userp = userp- > next;} writefile (0);} void changeairline () {airline * airlinep = ahead1- > next; char airlinenum [2000]; int airplanenum, time, ticks; char dep [2000], des [2000] Int exist = 0; int flag = 0; printf ("\ n\ n"); FILE * fp; fp = fopen ("airline", "r"); char ch; ch = fgetc (fp); rewind (fp); if (ch = = EOF) {printf ("\ n\ n") Printf ("- No flight information yet!") ; getchar (); getchar (); return;} printf ("flight number\ t\ t flight number\ t\ t departure\ t\ t destination\ t\ t\ t departure time\ t\ t votes\ n"); while (airlinep) {printf (PRINTF); airlinep = airlinep- > next;} airlinep = ahead Printf ("- Please enter the flight number you want to modify (return by 0):"); / / getchar (); while (gets (airlinenum)) {if (strcmp ("0", airlinenum) = = 0) {return } while (airlinep) {if (strcmp (airlinep- > airlinenum,airlinenum) = = 0) {exist = 1; break;} airlinep = airlinep- > next;} if (! exist) {airlinep = ahead Printf ("- the flight was not found! Please re-enter: ");} else {break;}} if (! exist) {return;} else {int choose; cls (); changemenu (); while (1) {printf ("-Please enter the action you want to do: ") Scanf (% d, & choose); switch (choose) {case 1: printf ("- Please enter the modified flight number:"); scanf ("% s", airlinenum); changeuserairline (airlinep- > airlinenum,airlinenum) Strcpy (airlinep- > airlinenum,airlinenum); break; case 2: printf ("- Please enter the modified flight number:"); scanf ("% lld", & airplanenum); airlinep- > airplanenum = airplanenum Break; case 3: printf ("- Please enter the modified place of departure:"); scanf ("% s", dep); strcpy (airlinep- > dep,dep); break Case 4: printf ("- Please enter the modified destination:"); scanf ("% s", des); strcpy (airlinep- > des,des); break Case 5: printf ("- Please enter modified departure time:"); while (scanf ("% d", & time)) {if (time)
< 1 || time >7) {printf ("- Please enter the correct departure time (1-7 from Monday to Sunday):";} else {airlinep- > time = time Break;}} break; case 6: printf ("- Please enter the revised number of tickets:") While (scanf ("% d", & ticks)) {if (ticks 999) {printf ("- Please enter the number of tickets within 0-999!") ;} else {airlinep- > ticks = ticks; break;}} break Case 7: flag = 1; break;} if (flag) {break;}} writefile (2);} void changeuserairline (char * userbookticks, char * bookticks) {user * userp = uhead While (userp) {for (int I = 0; I)
< userp->Bookcnt; I + +) {if (strcmp (userp- > bookticks [I], userbookticks) = 0) {strcpy (userp- > bookticks [I], bookticks);} userp = userp- > next;} writefile (0);} void searchuser () {user * userp = uhead; char username [2000]; int flag = 0 Printf ("- Please enter the passenger name you want to query (press 0 to exit):"); gets (username); if (strcmp (username, "0") = = 0) {return;} while (userp) {if (strcmp (userp- > username,username) = = 0) {flag = 1; break } userp = userp- > next;} if (! flag) {cls (); printf ("\ n\ n"); printf ("\ t\ t *\ n") Printf ("\ t\ t *\ n"); printf ("\ t\ t * passenger information does not exist! * *\ n "); printf ("\ t\ t * jump to the previous page. * *\ n "); printf ("\ t\ t *\ n ") Printf ("\ t\ t *\ n"); Sleep (2000); return;} else {long long int sign; while (1) {cls (); printf ("\ n\ n") Printf ("\ t\ t personal information of passenger% s\ n", userp- > username); printf ("\ t\ t *\ n"); printf ("\ t\ t passenger account number:") Puts (userp- > username); printf ("\ t\ t *\ n"); printf ("\ t\ t passenger password:"); puts (userp- > scert) Printf ("\ t\ t *\ n"); printf ("\ t\ t booking times:"); printf ("% d\ n", userp- > bookcnt) Printf ("\ t\ t *\ n"); if (userp- > bookcnt) {printf ("\ t\ t booking flight number:"); for (int I = 0; I
< userp->Bookcnt; I + +) {printf ("% s", userp- > bookticks [I]);} printf ("\ n"); printf ("\ t\ t *\ n") } else {printf ("\ t\ t\ t this passenger has not booked any flight yet! \ n ");} printf (" enter 0 to return to the previous page! "); while (scanf ("% lld ", & sign)) {if (sign = = 0) {return } else {printf ("invalid input! Please re-enter: ");}} void bookticks (user * userp) {char airlinenum [2000]; airline * airlinep = ahead1- > next; int exist = 0; int sign = 1; printf ("\ n\ n "); FILE * fp; fp = fopen (" airline "," r "); char ch Ch = fgetc (fp); if (ch = = EOF) {printf ("- No flight information!") ; getchar (); return;} printf ("flight number\ t\ t aircraft number\ t\ t departure place\ t destination\ t\ t departure time\ t\ t votes\ n"); while (airlinep) {printf (PRINTF); airlinep = airlinep- > next } printf ("- Please enter the flight number you want to book (press 0 to exit):"); getchar (); gets (airlinenum); airlinep = ahead; if (strcmp ("0", airlinenum) = = 0) {return } while (airlinep) {if (strcmp (airlinep- > airlinenum,airlinenum) = = 0) {if (airlinep- > ticks = = 0) {printf ("- there are no tickets available for this flight! \ n "); sign = 0;} else {int n; printf ("-Please enter the number of tickets to book: "); while (scanf ("% d ", & n)) {if (airlinep- > ticks)
< n) { printf("-------------机票数量不够！请重新输入:"); } else if (airlinep->Ticks > = n) {userp- > ticks + = n; airlinep- > ticks-= n; break;}} userp- > bookcnt + +; strcpy (userp- > bookticks [Userp-> bookcnt-1], airlinenum) / / userp- > usertime = airlinep- > time; writefile (0); writefile (2); exist = 1; break;}} airlinep = airlinep- > next } if (exist = = 0 & & sign = = 1) {printf ("- this flight does not exist! \ n ");} else if (exist = = 1) {printf ("-flight% s booked successfully! \ n ", airlinep- > airlinenum);} printf ("-the page is about to jump... "); Sleep (2000);} void returnticks (user * userp) {airline * airlinep = ahead; char airlinenum [2000]; int exist = 0; int flag = 0; int cnt = userp- > bookcnt; if (cnt = 0) {printf ("\ n\ n ") Printf ("\ t\ t you haven't booked any flight!") ; getchar (); return;} printf ("\ n\ n"); for (int I = 0; I
< cnt; i ++) { printf("-------------第%d次预订的航班号:",i + 1); printf("%s\n",userp->Bookticks [I]);} printf ("- Please enter the flight number to return the ticket (press 0 to exit):"); getchar (); while (gets (airlinenum)) {if (strcmp (airlinenum, "0") = = 0) {return;} for (int I = 0; I
< userp->Bookcnt; I + +) {if (strcmp (airlinenum,userp- > bookticks [I]) = = 0) {flag = I; exist = 1; break;}} if (! exist) {printf ("- to find the flight number! \ n "); printf ("-Please re-enter the flight number (press 0 to exit): ");} else {break;}} int n While (airlinep) {if (strcmp (airlinep- > airlinenum,airlinenum) = = 0) {printf ("- Please enter the number of tickets to be cancelled:"); while (scanf ("% d", & n)) {if (userp- > ticks)
< n) { printf("-------------您未持有此数量票量！\n"); printf("-------------请重新输入:"); } else if (userp->Ticks > = n) {userp- > ticks-= n; airlinep- > ticks + = n; break;} airlinep = airlinep- > next;} if (userp- > ticks = = 0) {for (int I = flag; I)
< userp->Bookcnt-1; I + +) {strcpy (userp- > bookticks [I], userp- > bookticks [I + 1]);} userp- > bookcnt -;} writefile (0); writefile (2); printf ("-% s flight refund successful! \ n ", userp- > bookticks [flag]; printf ("-about to return to the previous page. "); Sleep (2000);} void findairline (user * userp) {int cnt = userp- > bookcnt; long long sign; if (cnt = 0) {printf ("\ n\ n ") Printf ("\ t\ t you haven't booked any flights yet! \ n ");} printf ("\ n\ n "); for (int I = 0; I
< cnt; i ++) { printf("\t\t\t\t\t\t第%d次预订的航班号:%s\t第%d预定航班的票数：%d\n",i + 1, userp->
