模拟一个飞机票订票和退票系统([color=FF0000]大家看看还有什么地方可以改进)[/color]

假定某民航机场有m个航次的班机，每个航次都只到达一个目的地。试为该机场售票处设计一个自动订票和退票系统。

要求系统具有下列功能：
(1) 订票。若该航次余票数大于等于乘客订票数，则在该航次的乘客表（按乘客姓氏字母顺序连接）中，插入订票乘客的信息项，并修改航次有关数据，否则，给出相应的提示信息。
(2) 退票。若该航次当前退票数小于等于乘客订票数，则在相应的乘客表中找到该乘客项，修改该航次及乘客表中的有关数据．当由于退票，使乘客的订票数为零时，要从乘客表中撤消该乘客项；否则，给出相应的提示信息．
(3) 将某航次的余票数恢复初值------该航次的最大客票数．
当客户订票数要求不能满足时，系统也可向客户提供到达同一目的地的其他航线情况．
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <iostream>
using namespace std;

#define MaxNode 100
#define charl 100
#define MaxContainf 100
int m;//航班的次数 

typedef struct TypeTime
{
    int hour;
    int minute;
    int TimeLong;
}TypeTime;

typedef struct Passenger
{
    char name[charl];
    int TicketNum;  
    struct Passenger *next;
}Passenger;

typedef struct TypeFight
{
    TypeTime StartTime;
    TypeTime EndTime;
    int MaxContain;
    int ReadyContain;
    Passenger *head;
    Passenger *last;   
}TypeFight;

typedef struct TypePlane
{
    char ID[charl];
    char StartPlace[charl];
    char EndPlace[charl];
    int PlaneNum;
    TypeFight PlaneFight[MaxNode];    
}TypePlane;
TypePlane Plane[MaxNode];

/*int rand01()
{
//随机产生01 
srand( (unsigned)time( NULL ) );
return rand() % 2;
}*/

void newline(int n)
{
    int i;
    for(i = 1;i <= n;i++)
        printf("\n");
}

void space(int n)
{
    int i;
    for(i = 1;i <= n;i++)
        printf(" ");
}

void Input()
{
    //初始输入输入 
    FILE *fp;
    int i, j;
    //freopen("outt.txt", "w", stdout);
    fp = fopen("plane.txt", "r");
    fscanf(fp, "%d", &m);
    printf("m = %d\n", m);
    for(i = 0;i < m;i++){
        fscanf(fp, "%s%s%s%d", Plane[i].StartPlace,Plane[i].EndPlace,
            Plane[i].ID, &Plane[i].PlaneNum);
        printf("%s %s\n%s\n%d\n", Plane[i].StartPlace, Plane[i].EndPlace,
            Plane[i].ID, Plane[i].PlaneNum); 
        for(j = 0;j < Plane[i].PlaneNum;j++){
            fscanf(fp, "%d:%d", &Plane[i].PlaneFight[j].StartTime.hour,
                &Plane[i].PlaneFight[j].StartTime.minute);
            fscanf(fp, "%d:%d", &Plane[i].PlaneFight[j].EndTime.hour,
                &Plane[i].PlaneFight[j].EndTime.minute);
            
            printf("%d:%d ", Plane[i].PlaneFight[j].StartTime.hour,
                Plane[i].PlaneFight[j].StartTime.minute);
            printf("%d:%d\n", Plane[i].PlaneFight[j].EndTime.hour,
                Plane[i].PlaneFight[j].EndTime.minute);
            
            
            Plane[i].PlaneFight[j].MaxContain = MaxContainf;
            Plane[i].PlaneFight[j].ReadyContain = 0;
            Plane[i].PlaneFight[j].StartTime.TimeLong =  
                Plane[i].PlaneFight[j].StartTime.hour * 60 + 
                Plane[i].PlaneFight[j].StartTime.minute;
            Plane[i].PlaneFight[j].EndTime.TimeLong =  
                Plane[i].PlaneFight[j].EndTime.hour * 60 + 
                Plane[i].PlaneFight[j].EndTime.minute;           
            Plane[i].PlaneFight[j].head = (Passenger *)malloc(sizeof(Passenger));
            Plane[i].PlaneFight[j].head->next = NULL;    
            Plane[i].PlaneFight[j].last = Plane[i].PlaneFight[j].head;
        }        
    }  
    fclose(fp);
}
int BookTicket()
{
    char ID[charl];
    char name[charl];
    TypeTime BeforeTime;
    int TimeLong, Remain;
    int i, j, TicketNum;
    int flag = 0;
    int n;
    Passenger *p, *s, *t;
    while(1){
        system("cls");
        printf("请输入你要都买得的票的ID。。。。\n");
        scanf("%s", ID);    
        for(i = 0;i < m;i++){
            if(strcmp(Plane[i].ID, ID) == 0)break;
        } 
        if(i >= m) return 0; //查询失败，找不到你要查找的ID
        printf("起飞地点：%s\n", Plane[i].StartPlace);
        printf("降落地点：%s\n", Plane[i].EndPlace);
        printf("\n\n");
        printf("清查看起飞地点和降落地点是否正确。。。。\n");
        printf("\n");
        printf("1.继续\n");
        printf("2.重新输入ID\n");
        scanf("%d", &n);
        if(n == 1)break;
    }
    printf("请输入你要购买几时后的机票。如4:12。。。。\n"); 
    scanf("%d:%d", &BeforeTime.hour, &BeforeTime.minute);
    TimeLong = BeforeTime.hour * 60 + BeforeTime.minute;
    printf("请输入你要购买多少张此机票。。。。\n");
    scanf("%d", &TicketNum);
    for(j = 0;j < Plane[i].PlaneNum;j++){
        Remain = Plane[i].PlaneFight[j].MaxContain - Plane[i].PlaneFight[j].ReadyContain;
        //printf("%d %d\n", Remain, TimeLong);
        if(Plane[i].PlaneFight[j].StartTime.TimeLong >= TimeLong  
            && TicketNum <= Remain){
            //订票成功 
            printf("你可以购买此票.........\n");
            printf("起飞时间：%d:%d\n", Plane[i].PlaneFight[j].StartTime.hour, 
                Plane[i].PlaneFight[j].StartTime.minute);
            printf("降落时间：%d:%d\n", Plane[i].PlaneFight[j].EndTime.hour, 
                Plane[i].PlaneFight[j].EndTime.minute);
            Plane[i].PlaneFight[j].ReadyContain += TicketNum;
            //加入乘客对队列，按姓氏首字母顺序保存 
            printf("请输入你的姓名：");
            scanf("%s", name);
            printf("购买成功,谢谢你！请提前赶到机场。。。。。\n");
            p = Plane[i].PlaneFight[j].head->next;
            s = Plane[i].PlaneFight[j].head;// 父节点 
            while(p != NULL){
                if(strcmp(name, p->name) == 1){
                    s = p;
                    p = p->next;
                }
                else break;
            }
            t = (Passenger *)malloc(sizeof(Passenger));
            strcpy(t->name, name);
            t->TicketNum = TicketNum;
            t->next = p;
            s->next = t;  
            flag = 1;
            break;           
        }
    }
    if(flag == 0) printf("对不起你所找的航班时间已过，请明天再俩购买\n");
    system("pause");
    return 1;
}

void CancelTicket()
{
    char ID[charl];
    char name[charl];
    int TicketNum;
    int flag = 0;
    int i, j;
    int n;
    Passenger *p, *s;
    while(1){
        system("cls");
        printf("请输入你要退票的ID......\n");
        scanf("%s", ID);
        for(i = 0;i < m;i++){
            if(strcmp(ID, Plane[i].ID) == 0)break;
        }
        if(i >= m){
            printf("没有你订购的航班\n");
            printf("1.重新输入\n"); 
            printf("2.退出退票");
            scanf("%d", &n); 
            if(n == 2) return;
        }
        else break;
    }
    printf("请输入你的名字。。。。\n");
    scanf("%s", name);
    
    
    
    for(j = 0;j < Plane[i].PlaneNum;j++){
        p = Plane[i].PlaneFight[j].head->next;
        s = Plane[i].PlaneFight[j].head;//父节点 
        while(p != NULL){
            
            if(strcmp(name, p->name) == 0){
                //有这个人 
                printf("请输入你要退的票的数量。。。。\n");
                scanf("%d", &TicketNum);
                if(TicketNum > p->TicketNum){
                    printf("对不起，你退票数大于你购买的机票,不能退票\n");
                }
                else{ 
                    //可以退票 
                    p->TicketNum -= TicketNum;
                    if(p->TicketNum <= 0){
                        s->next = s->next->next;  
                        free(p);
                    } 
                    printf("退票成功\n");
                    system("pause");
                }
                flag = 1;
                break;
            }
            p = p->next;
        }
        if(flag == 1) break;
    }
    if(flag == 0)printf("查无此人\n");
}

int main()
{
    int n, temp, s;
    Input();
    while(1){
        //n = rand01();
        system("cls");
        newline(10);
        space(20);
        printf("欢迎使用机票查询系统\n");
        space(24);
        printf("0.订票\n");
        space(24);
        printf("1.退票\n");
        space(24);
        printf("3.退出系统\n");
        scanf("%d", &n);
        if(n == 3) break;
        if(n == 0){
            while(1){
                temp = BookTicket();
                if(temp == 0){
                    printf("对不起，找不到你所查找的信息！\n");
                    printf("1.重新查找\n2.退出上一层\n");
                    scanf("%d", &s);
                    if(s == 2) break;   
                }
                else break;
            }
        }
        else CancelTicket();              
        
    }
    return 0;   
}