帮忙看看哪里错了~！（急）编译没错，但是运行不了
一、问题描述：
航空客运订票的业务活动包括：查询航线、客票预定和办理退票等。试设计一个航空客运订票系统，以使上述业务可以借助计算机来完成。
二、基本要求：
（1）每条航线所涉及的信息有：终点站名、航班号、飞机号、飞行日期（星期几）、成员定额、余票量、已订票的客户名单（包括姓名、订票量、舱位等级1，2或3）以及等候替补的客户名单（包括姓名、所需票量）；
（2）作为示意系统，全部数据可以只放在内存中；
（3）系统能实现的操作和功能如下：
①查询航线：根据旅客提出的终点站名输出下列信息：航班号、飞机号、星期几飞行，最近一天航班的日期和余票额；
②承办订票业务：根据客户提出的要求（航班号、订票数额）查询该航班票额情况，若尚有余票，则为客户办理订票手续，输出座位号；若已满员或余票额少于订票额，则需重新询问客户要求。若需要，可登记排队候补；
③承办退票业务：根据客户提供的情况（日期、航班），为客户办理退票手续，然后查询该航班是否有人排队候补，首先询问排在第一的客户，若所退票额能满足他的要求，则为它办理订票手续，否则依次询问其他排队候补的客户。
三、测试数据：
自行指定。
四、实现提示：
两个客户名单可分别由线性表和队列实现。为查找方便，已订票客户的线性表应按客户姓名有序，并且，为插入和删除方便，应以链表作存储结构。由于预约人数无法预计，队列也应以链表作存储结构。整个系统需汇总各条航线的情况登陆在一张线性表上，由于航线基本不变，可采用顺序存储结构，并按航班有序或按终点站名有序，每条航线是这张表上的一个记录，包含上述8个域、其中成员名单域为指向成员名单链表的头指针，等候替补的客户名单域为分别指向队头和队尾的指针。
五、程序源代码：
六、
#include <stdio.h>
#include <string.h>
#define AIRLINENUM 5 //航线数量
typedef struct Waitertype
{ char name[10]; //等待订票的客户的名字
int neednum; //该客户所需票数
struct Waitertype *next;
}Waitertype;
typedef struct
{
Waitertype *front;
Waitertype *rear;
}WaitQueue;
typedef struct
{ char *planenum; //航班号
char *endstation; //终点站名
char *weekday; //飞行周日
int seatnum; //飞机乘员定额
int remainnum; //余票数
int waiternum; //等待订票的客户数量
WaitQueue Q; //等待订票的客户队列
}AirlineInfor; //航线信息
//*****************************************************************
void InitAirline(AirlineInfor airline[]) //初始化
{ airline[0].planenum="EA391";
airline[0].endstation="shanghai";
airline[0].weekday="Monday";
airline[0].seatnum=100;
airline[0].remainnum=5;
airline[0].waiternum=0;
airline[0].Q.front=airline[0].Q.rear=(Waitertype*)malloc(sizeof(Waitertype));
airline[1].planenum="EA392";
airline[1].endstation="beijing";
airline[1].weekday="Tuesday";
airline[1].seatnum=100;
airline[1].remainnum=3;
airline[1].waiternum=0;
airline[1].Q.front=airline[1].Q.rear=(Waitertype*)malloc(sizeof(Waitertype));
airline[2].planenum="EA393";
airline[2].endstation="fuzhou";
airline[2].weekday="Wednesday";
airline[2].seatnum=100;
airline[2].remainnum=0;
airline[2].waiternum=0;
airline[2].Q.front=airline[2].Q.rear=(Waitertype*)malloc(sizeof(Waitertype));
airline[3].planenum="EA394";
airline[3].endstation="shanghai";
airline[3].weekday="Thursday";
airline[3].seatnum=100;
airline[3].remainnum=0;
airline[3].waiternum=0;
airline[3].Q.front=airline[3].Q.rear=(Waitertype*)malloc(sizeof(Waitertype));
airline[4].planenum="EA395";
airline[4].endstation="tianjin";
airline[4].weekday="Friday";
airline[4].seatnum=100;
airline[4].remainnum=1;
airline[4].waiternum=0;
airline[4].Q.front=airline[4].Q.rear=(Waitertype*)malloc(sizeof(Waitertype));
}/*InitAirline*/
//*****************************************************************
void AskAirline(AirlineInfor airline[]) //查询模块
{ int i,cmd,flag=0;
char *endstation= NULL;
printf("Please enter where you want to go:");
scanf("%s",endstation); //输入目的地
printf("\n");
printf("You can take these planes:\n"); /*列出余票信息,包含：航班号，飞行周日以及余票量*/
for(i=0;i<AIRLINENUM;i++)
if(!strcmp(endstation,airline[i].endstation))
{ flag=1;
printf("Plane %s,take off on %s and remain %d tickets\n",airline[i].planenum,airline[i].weekday,airline[i].remainnum);
}
if (i>=AIRLINENUM)
{ if(flag==0)
printf("Without the ticket you want!\n");
printf("1-->Continue,2-->End this service:");
scanf("%d",&cmd);
printf("\n");
switch(cmd)
{ case 1:
AskAirline(airline); //继续查询
break;
case 2:
printf("You have exited this service\n");
break;
default:
printf("You have enter a wrong command!\n");
break;
}
}/*if*/
}/*AskAirline*/
//*****************************************************************
void InQueue(WaitQueue *Q,int neednum) //排队等票
{
Waitertype *p1,*p2;
p1=(Waitertype*)malloc(sizeof(Waitertype));
printf("Please enter your name:");
scanf("%s",p1->name);
p1->neednum=neednum;
p1->next=NULL;
p2=Q->rear; //以下3行用于插入新的客户排队等票
p2->next=p1;
Q->rear=p1;
}
void RegisterAirline(AirlineInfor airline[]) //订票模块
{ char *planenum=NULL; //所要预定机票的航班号
int neednum; //所需数量
int i=0,num=0,cmd1,cmd2,cmd3;
printf("Please enter the NO.:");
scanf("%s",planenum);
printf("\n");
printf("Please enter quantity you need :");
scanf("%d",&neednum);
printf("\n");
while(strcmp(planenum,airline[i].planenum)&&(i<AIRLINENUM))
i++;
if(i>=AIRLINENUM) //错误处理
{ printf("Without the ticket you want!\n");
printf("1-->Continue,2-->End this service:");
scanf("%d",&cmd1);
printf("\n");
switch(cmd1)
{ case 1:
RegisterAirline(airline);break;
case 2:
printf("You have exited this service!\n");
break;
default:
printf("You have enter a wrong command!\n");
break;
}
}/*if*/
else
{ num=airline[i].remainnum;
loop: if(neednum<=airline[i].remainnum) //订票成功
{
airline[i].remainnum=airline[i].remainnum-neednum;
printf("Successfully registering!\n");
}
else
{ if(num==0) //没有余票
{ printf("Without any tickets that you want!\n");
printf("1-->Wait for tickets,2-->End this service:\n");
scanf("%d",&cmd2);
printf("\n");
switch(cmd2)
{ case 1:
airline[i].waiternum++;
InQueue(&airline[i].Q,neednum);
printf("When we have enough tickets,we'll inform you!\n");
break;
case 2:
break;
default:
printf("You have enter a wrong command!\n");
break;
}/*switch*/
}/*if*/
else
{
printf("Without enough tickets!\n"); //客户需要机票数量超出余票数量
printf("1-->Reduce the quality,2-->End this service:");
scanf("%d",&cmd3);
printf("\n");
switch(cmd3)
{ case 1:
printf("Please reenter the quantity you need :");
scanf("%d",&neednum);
printf("\n");
goto loop;
case 2:
break;
default:
printf("You have enter a wrong command!\n");
break;
}/*switch*/
}/*else*/
}/*else*/
}/*else*/
}/*RegisterAirline*/
//*****************************************************************
void SearchQueue(AirlineInfor airline[],int i) /*为退票而多出的票寻找符合条件的等待客户办理订票*/
{
int remainnum=0,j,num=0;
WaitQueue Q;
Waitertype *p1,*p3;
remainnum=airline[i].remainnum;
Q=airline[i].Q;
num=airline[i].waiternum;
p3=p1=Q.front;
p1=p1->next;
for(j=1;j<=num;j++) //为符合条件的等待客户办理订票
{
if(p1->neednum<=remainnum)
{ printf("%s get %d tickets\n",p1->name,p1->neednum);
airline[i].remainnum-=p1->neednum;
if(p1==Q.rear)
Q.rear=Q.front; //如果P1刚好也是队尾结点，这使队列为空队列
else
p3->next=p1->next;
free(p1);
p1=p3;p1=p1->next;
} /*释放P1指针所指的结点，并把队头指针的next指向p1的next*/
else
{
if(p1==Q.rear)
return;
else
{ p3->next=p1->next;
Q.rear->next=p1;p1->next=NULL;
Q.rear=p1;p1=p3;p1=p1->next;
} /*如果p1！=Q.rear,把P1所指的结点插入到队列的队尾，队头指针的next指向P1的next*/
}
}
}
void RebackAirline(AirlineInfor airline[])/*退票模块，成功返回1，失败或放弃返回0*/
{ char *planenum=NULL;/*所退机票的航班号*/
int i=0,j,cmd1,cmd2,backnum;
printf("Please enter the NO. of the plane:");
scanf("%s",planenum);
printf("\n");
printf("Please enter the quantity you want to reback:");
scanf("%d",&backnum);/*所退票数*/
printf("\n");
while(strcmp(planenum,airline[i].planenum)&&(i<AIRLINENUM))
i++;
if(i<AIRLINENUM)/*退票成功*/
{ airline[i].remainnum+=backnum;
printf("Successfully reback!\n");
if(airline[i].waiternum)
SearchQueue(airline,i);/*查询待票客户*/
}/*if*/
else
{ printf("You have enter a wrong NO.\n");
printf("1-->Continue this service,2-->End this service:");
scanf("%d",&cmd2);
printf("\n");
switch(cmd2)
{ case 1:
RebackAirline(airline);break;
case 2:
printf("Unsuccessfully reback!\n");
break;
default:
printf("You have enter a wrong command!\n");
break;
}
}/*else*/
}/*RebackAirline*/
//*****************************************************************
void main()
{ AirlineInfor airline[AIRLINENUM]; //航线数量
int cmd;
InitAirline(airline); //初始化
printf("Welcome to use this system!!!\n");
do
{ printf("1-->Ask for information,2-->Register tickets,3-->Reback tickets:0-->Exit:");
scanf("%d",&cmd);
printf("\n");
switch(cmd)
{
case 0:
printf("Thanks for use this system!\n");
break;
case 1:
AskAirline(airline);/*查询模块*/
break;
case 2:
RegisterAirline(airline);/*订票模块*/
break;
case 3:
RebackAirline(airline);/*退票模块*/
break;
default:
printf("You have enter a wrong command!\n");
break;
}/*switch*/
}while(cmd);
}/*main*/
[解决办法]
错误1:
AskAirline
RegisterAirline
RebackAirline
函数中获取键盘输入字符的缓冲区,你使用的只是一个空指针没有指向存在的内存空间:
改为:char szBuffer[32]={0};
scanf("%s",szBuffer);这时候szBuffer才是你想要获取的键盘输入字符。
错误2:
while(strcmp(planenum,airline[i].planenum)&&(i<AIRLINENUM)) i++;
这句应该改成:
while((i<AIRLINENUM)&&strcmp(planenum,airline[i].planenum)) i++;
检查条件是从左至右,按照你那样写当i=5的时候已经数组越界。
