C++编写一个简单的机票预订系统。该程序显示一个带有下列选项的菜单：预订机票、取消预订、查看某人是否预定了机票，以及显示预订乘客。这些信息保存在一个按照字母排列的名字链表中。在程序的简化版中，假设只为一趟航班预订机票。在完全版中不再限制航班的数目。创建一个航班链表，其中每个节点都指向乘客链表的指针。

/*******************list.h**********************/#include <iostream>#include <malloc.h>#include <string.h> using namespace std;typedef struct TK{ char Name[20]; int SeatId; struct TK *next;}Ticket; typedef struct FLY{ char FlightId[10]; int Seat[50]; Ticket *PersonHead; struct FLY *next;}Flight; class Person{public: void ListInitiate(Flight **head); bool Check(int *Seat,int Ch); void Insert(Flight *head); int Delete(Flight *head); void show(Flight *head); void Search(Flight *head); void AddFlght(Flight *head); void DeleteFlght(Flight *head);}; /*******************************main.cpp**********************/#include "list.h" int menu(){ int option; cout<<endl<<endl; cout<<"主菜单"<<endl; cout<<" 1.Booking the ticket of flighting"<<endl; cout<<" 2.Cancel the flighting"<<endl; cout<<" 3.Display the information "<<endl; cout<<" 4.Search"<<endl; cout<<" 5.Add a Flight"<<endl; cout<<" 6.Delete a Flight"<<endl; cout<<" 0.Exit"<<endl<<endl; cout<<"Please input your option:"; cin>>option; getchar(); cout<<endl; if(option>=0&&option<=6) return option; else return -1;}int main(){ cout<<"------------------------->航班管理系统<<<<-----------------------------"<<endl; cout<<" 欢迎你使用该航班系统"<<endl; Flight *head; Person P; P.ListInitiate(&head); while(true) { switch(menu( )) { case 1:P.Insert(head);break; //预订 case 2:P.Delete(head);break; //取消 case 3:P.show(head);break; //显示 case 4:P.Search(head);break; //查询 case 5:P.AddFlght(head);break; //添加航班 case 6:P.DeleteFlght(head);break; //删除航班 case 0:exit(0); default:cout<<"Choice error!\n"; } } return 0;}/*****************************************passenger.cpp*************************/#include "List.h"void Person::ListInitiate(Flight **head){ int count=0; *head = (Flight *)malloc(sizeof(Flight)); (*head)->PersonHead=(Ticket *)malloc(sizeof(Ticket)); (*head)->PersonHead->next=NULL; (*head)->next=NULL; for(int i=0;i<50;i++) { (*head)->Seat[i]=0; }} bool Person::Check(int *Seat,int Ch){ int i; for(int i=0;i<50;i++) { if(Ch==i&&Seat[i]!=1)return 1; } return 0;}Flight* Index(Flight *head,char *Id){ Flight *p=head->next; while(p) { if(strcmp(p->FlightId,Id)==0) { return p; } p=p->next; } return NULL;}/*******************************预定******************************/void Person::Insert(Flight *head){ int count=0; int Ch; Flight *s=head; if(s->next==NULL) { cout<<"暂无航班！"<<endl; return ; } cout<<"航班列表："<<endl; s=s->next; while(s!=NULL) { puts(s->FlightId); count++; if(count%5==0) cout<<"\n"; s=s->next; } count=0; char FID[10]; cout<<"输入航班ID："; gets(FID); s=Index(head,FID); if(s==NULL) { cout<<"输入ID有误"<<endl; return; } cout<<endl; cout<<"有以下座位可供选择："<<endl; for(int i=0;i<50;i++) { if(s->Seat[i]!=1) { cout<<i<<"号"<<"\t"; count++; if(count%5==0) cout<<"\n"; } } cout<<endl; cout<<"输入座位号：\n"; cin>>Ch; getchar(); if(!Check(head->Seat,Ch)) { cout<<"This Seat have been booked or it is non-existent"; return ; } s->Seat[Ch]=1; char name[20]; cout<<endl; cout<<"Input your Name:"; gets(name); Ticket *p=s->PersonHead,*q; while(p->next!=NULL) { if(strcmp(p->next->Name,name)>0) break; p=p->next; } q=(Ticket *)malloc(sizeof(Ticket)); q->next=p->next; p->next=q; strcpy(q->Name,name); q->SeatId=Ch;} /*******************************取消预定******************************/int Person::Delete(Flight *head){ char name[20],FID[10]; cout<<"Input your Name:"; gets(name); getchar(); Flight *s; cout<<"Input the Flight ID:"; gets(FID); s=Index(head,FID); if(s==NULL) { cout<<"输入ID有误"<<endl; return 0; } Ticket *p=s->PersonHead->next,*pre=s->PersonHead; int flag=0; while(p!=NULL) { if(strcmp(p->Name,name)==0){ flag=1; break; } pre=p; p=p->next; } if(flag==1){ pre->next=p->next; s->Seat[p->SeatId]=0; free(p); cout<<"你的机票已经取消成功"; } else { cout<<"您还没订票\n"; return 0; } return 1;}/*******************************显示信息******************************/void Person::show(Flight *head){ Flight *s; char FID[10]; cout<<"Input The Flight ID:"; gets(FID); s=Index(head,FID); if(s==NULL) { cout<<"输入ID有误"<<endl; return; } Ticket *p=s->PersonHead->next; if(p==NULL) { cout<<"还没乘客订票"<<endl; return; } while(p!=NULL) { cout<<"乘客: "<<p->Name<<" 座位号:" <<p->SeatId; p=p->next; }} /*******************************查询相关信息******************************/void Person::Search(Flight *head){ char name[20]; cout<<"Input Your Name:"; gets(name); Flight *s; char FID[10]; cout<<"Input The Flight ID:"; gets(FID); s=Index(head,FID); if(s==NULL) { cout<<"输入ID有误"<<endl; return; } Ticket *p=s->PersonHead->next; int flag=0; while(p!=NULL) { if(strcmp(p->Name,name)==0){ flag=1; break; } p=p->next; } if(flag==1){ cout<<name<<" 已订机票"<<endl; } else { cout<<name<<" 未订机票"<<endl; }}/*******************************增加航班**********************************/void Person::AddFlght(Flight *head){ char FlightID[10]; Flight *p=head,*q; cout<<" 输入航班ID："; gets(FlightID); while(p->next) { p=p->next; } ListInitiate(&q); p->next=q; strcpy(q->FlightId,FlightID); cout<<"——航班已添加成功！";}/**********************************删除航班*******************************************/void Person::DeleteFlght(Flight *head){ char FlightID[10]; int flag=0; Flight *p=head->next,*q=head; int count=0; Flight *s=head; if(s->next==NULL) { cout<<" 暂无航班！"<<endl; return ; } cout<<" 航班列表："<<endl; s=s->next; while(s!=NULL) { cout<<s->FlightId<<endl; count++; if(count%5==0) cout<<"\n"; s=s->next; } cout<<" 输入航班ID："; gets(FlightID); while(p) { if(strcmp(p->FlightId,FlightID)==0) { flag=1;break; } q=p; p=p->next; } if(flag==0) { cout<<" 该航班ID不存在！"; return ; } q->next=q->next->next; free(p); cout<<" 航班已删除！\n";}

效果如下：

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