C语言实现-航空订票系统（飞机订票系统）

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <conio.h>
#define MAX_Flight 50
#define MAX_Passenger 20
#define MAX_Order 50

typedef struct Flight
{
    char fid[20];         //航班号
    char fname[20];    //航班名称
    char start[10];  //起点
    char end[10];     //终点
    int fnum;    //票数
}Flight;

typedef struct Passenger{
    char pid[20];    //身份证
    char pname[10];    //姓名
    char password[20];    //密码
    char tell[20];    //电话
}Passenger;

typedef struct Order{
    char pid[20];    //身份证
    char fid[20];    //航班号
    int num;    //票数
}Order;

Flight *FLI;
Passenger *PAS;
Order *ORD;

char start[10]; //起点
char end[10];   //终点
char search_fid[50][20];    //符合条件的航班号
int search_fnum[50];    //符合条件的航班票数
int online = 0; //是否登录的变量
char online_pid[20];    //在线用户的身份证
int search_num = 0;    //符合条件的航班数

void init_sys(void);    // 系统初始化
void show_flight(void);    // 显示航班表
void start_sys(void);    // 系统开始运行
void exit_sys(void);    // 退出系统
void menu(void);        // 生成主菜单
void login(void);       // 登录
void logout(void);  //用户登出
void passenger_info(void);  //查询旅客信息
bool change_pas_info(void); //修改旅客信息
void search_start(void);    // 生成查询页面
bool search(void);    // 查询航班
void order_list(void);    // 生成订单表
void del_order(void);    // 退票
void clear_stdin(void);    // 清除输入缓冲区
char* get_str(char* str,size_t len);  // 获取字符串
char get_cmd(char start,char end);    // 获取cmd命令

int main()
{
    init_sys();
    start_sys();
    exit_sys();
    return 0;
}

// 系统初始化
void init_sys(void)
{
    // 申请堆内存、加载数据
    FLI = calloc(MAX_Flight,sizeof(Flight));
    PAS = calloc(MAX_Passenger,sizeof(Passenger));
    ORD = calloc(MAX_Order,sizeof(Order));
    printf("system_init...\n");

    FILE* ofrp = fopen("order.txt","r");
    int i=0;
    for(i=0; i<MAX_Order; i++)    //读取文本中的数据到内存
    {    int num = 0;
        num = fscanf(ofrp,"%s %s %d\n",ORD[i].pid,ORD[i].fid,&ORD[i].num);
    }

    FILE* ffrp = fopen("flight.txt","r");
    for(i=0; i<MAX_Flight; i++)
    {
        int num = 0;
        num = fscanf(ffrp,"%s %s %s %s %d\n",FLI[i].fid,FLI[i].fname,FLI[i].start,FLI[i].end,&FLI[i].fnum);
    }

    FILE* pfrp = fopen("passenger.txt","r");
    for(i=0; i<MAX_Passenger; i++)
    {
        int num = 0;
        num = fscanf(pfrp,"%s %s %s %s\n",PAS[i].pid,PAS[i].pname,PAS[i].password,PAS[i].tell);
    }
}

// 显示航班表
void show_flight(void)
{
    int i = 0;
    for(i=0; i<MAX_Flight; i++)
    {
        if(strlen(FLI[i].fid) != 0)
        {
            printf("id:%s name:%s start:%s end:%s fnum:%d\n",FLI[i].fid,FLI[i].fname,FLI[i].start,FLI[i].end,FLI[i].fnum);
        }
    }
}

// 系统开始运行
void start_sys(void)
{
    // 进入系统的业务流程控制
    //printf("系统开始运行...\n");
    //show_flight();
    while(true)
    {
        menu();
        switch(get_cmd(‘0‘,‘7‘))
        {
            case ‘1‘: search_start(); break;
            case ‘2‘: order_list(); break;
            case ‘3‘: del_order(); break;
            case ‘4‘: passenger_info(); break;
            case ‘5‘: change_pas_info(); break;
            case ‘6‘: login(); break;
            case ‘7‘: logout(); break;
            case ‘0‘: return;
        }
    }
}

// 系统结束
void exit_sys(void)
{
    printf("data insert...\n");
    FILE* ofwp = fopen("order.txt","w");
    printf("ready insert order.txt\n");
    int i= 0;
    for(i=0; i<MAX_Order; i++)    //数据存储回本地
    {
        int num = 0;
        if(strlen(ORD[i].pid) != 0)
        {
            num = fprintf(ofwp,"%s %s %d\n",ORD[i].pid,ORD[i].fid,ORD[i].num);
            //printf("insert order.txt success\n");
        }
    }

    FILE* ffwp = fopen("flight.txt","w");
    printf("insert flight.txt\n");
    for(i=0; i<MAX_Flight; i++)
    {
        int num = 0;
        if(strlen(FLI[i].fid) != 0)
        {
            num = fprintf(ffwp,"%s %s %s %s %d\n",FLI[i].fid,FLI[i].fname,FLI[i].start,FLI[i].end,FLI[i].fnum);
            //printf("insert flight.txt success\n");
        }
    }

    FILE* pfwp = fopen("passenger.txt","w");
    printf("insert passenger.txt\n");
    for(i=0; i<MAX_Passenger; i++)
    {
        int num = 0;
        if(strlen(PAS[i].pid) != 0)
        {
            num = fprintf(pfwp,"%s %s %s %s\n",PAS[i].pid,PAS[i].pname,PAS[i].password,PAS[i].tell);
            //printf("insert passenger.txt success\n");
        }
    }
    // 释放内存、保存数据
    free(FLI);
    free(PAS);
    free(ORD);
    printf("exit...\n");
}

// 生成主菜单
void menu(void)
{
    printf("\n");
    printf("********************************\n");
    printf("|                              |\n");
    printf("|      flight order system     |\n");
    printf("*      1.search_flight         *\n");  //查询航班
    printf("|      2.order_list            |\n");   //查询订票信息
    printf("*      3.del_order             *\n");    //退订
    printf("|      4.passenger_info        |\n");   //查询旅客信息
    printf("*      5.change_pas_info       *\n");  //修改旅客信息
    printf("|      6.login                 |\n");  //用户登录
    printf("*      7.logout                *\n");    //用户登出
    printf("|      0.exit_sys              |\n");   //退出系统
    printf("|                              |\n");
    printf("********************************\n");
    //printf("\n");
}

// 登录
void login(void)
{
    if(online == 0)    //如果没有登录
    {
        int i=0;
        int time = 0;
        while(time<3)
        {
            char entry_pid[20]; //临时变量身份证
            char entry_pw[20];  //临时变量密码
            printf("please login!\n");
            printf("please entry pid:");
            get_str(entry_pid,20);
            printf("please entry password:");
            get_str(entry_pw,20);
            for(i=0; i<MAX_Passenger; i++)
            {
                if(strlen(entry_pid)==0 || strlen(entry_pw)==0)
                {
                    printf("pid or password can‘t be empty\n");
                    time++;
                    break;
                }
                else if(strcmp(PAS[i].pid,entry_pid) == 0 && strcmp(PAS[i].password,entry_pw) == 0)
                {
                    printf("login success!\n");
                    strcpy(online_pid,entry_pid);
                    online = 1;
                    return;
                }
                else if(i==MAX_Passenger-1)
                {
                    printf("pid or password error\n");
                    time++;
                }
            }
        }
        online = -1;
        printf("you have been locked,you can use this system now\n");
    }
    else if(online ==1)
    {
        printf("you have been login\n");
    }
    else
    {
        printf("you have been locked,you can use this system now\n");
    }

}

// 用户登出
void logout(void)
{
    if(online == 1)    //如果已经登录
    {
        online = 0;
        printf("logout success\n");
    }
    else if(online == -1)
    {
        printf("you have been locked,you can use this system now\n");
    }
    else
    {
        printf("you have not login\n");
    }
}

// 查询旅客信息
void passenger_info(void)
{
    if(online == 1)    //如果已经登录
    {
        //printf("online_pid:");
        //puts(online_pid);
        int i = 0;
        for(i=0; i<MAX_Passenger; i++)
        {
            if(strcmp(online_pid,PAS[i].pid)==0)
            {
                printf("pid:%s, pname:%s, password:%s, tell:%s\n",PAS[i].pid,PAS[i].pname,PAS[i].password,PAS[i].tell);
                break;
            }
        }
    }
    else if(online == -1)
    {
        printf("you have been locked,you can use this system now\n");
    }
    else
    {
        printf("you have not login\n");
    }
}

//修改旅客信息
bool change_pas_info(void)
{
    if(online == 1)    //如果已经登录
    {
        printf("your old info:\n");
        int i = 0;
        for(i=0; i<MAX_Passenger; i++)
        {
            if(strcmp(online_pid,ORD[i].pid)==0)
            {
                printf("pid:%s, pname:%s\npassword:%s, tell:%s\n",PAS[i].pid,PAS[i].pname,PAS[i].password,PAS[i].tell);
                break;
            }
        }
        char new_pid[20];
        char new_pname[10];
        char new_password[20];
        char new_tell[20];
        printf("please entry new pid:");
        get_str(new_pid,20);
        printf("please entry new pname:");
        get_str(new_pname,10);
        printf("please entry new password:");
        get_str(new_password,20);
        printf("please entry new tell:");
        get_str(new_tell,20);
        strcpy(PAS[i].pid,new_pid);
        strcpy(PAS[i].pname,new_pname);
        strcpy(PAS[i].password,new_password);
        strcpy(PAS[i].tell,new_tell);
        printf("change success\n");
    }
    else if(online == -1)
    {
        printf("you have been locked,you can use this system now\n");
    }
    else
    {
        printf("you have not login\n");
    }
}

// 开始查询航班
void search_start(void)
{
    if(search())
    {
        printf("1.order\n");
        printf("0.back\n");
        char cmd = get_cmd(‘0‘,‘1‘);
        if(cmd == ‘0‘)
        {
            return;
            //start_sys();
        }
        else
        {
            char fid[20];   // 选择的航班号
            if(online == 1) // 如果已经登录
            {
                printf("please entry fid:");
                get_str(fid,20);
                if(0 == strlen(fid))
                {
                    printf("fid is empty\n");
                }
                int i = 0;
                for(i=0; i<search_num; i++)
                {
                    //printf("fid:%s s_fid:%s num:%d\n",fid,search_fid[i],search_fnum[i]);
                    if(strcmp(fid,search_fid[i])==0 && search_fnum[i]>0)    //查询到对应航班
                    {
                        printf("order success\n");
                        int j=0;
                        for(j=0; j<MAX_Flight; j++) // 遍历航班表
                        {
                            if(strcmp(fid,FLI[j].fid)==0)
                            {
                                FLI[j].fnum--;    //票数减1
                                break;
                            }
                        }
                        int k=0;
                        for(k=0; k<MAX_Order; k++)  // 遍历订票表
                        {
                            //printf("ready insert...\n");
                            if(strlen(ORD[k].pid) == 0) // 在空位置插入数据
                            {
                                strcpy(ORD[k].pid,online_pid);  // 插入当前用户身份证
                                strcpy(ORD[k].fid,search_fid[i]);   // 插入当前选择的航班号
                                ORD[k].num = 1;
                                printf("insert_to_order success\n");
                                break;
                            }
                        }
                        return;
                    }
                    else if(strcmp(fid,search_fid[i])==0 && search_fnum[i] == 0)
                    {
                        printf("no ticket\n");
                        search_start();
                    }
                    else if(i==MAX_Flight-1)
                    {
                        printf("don‘t have this fid\n");
                        search_start();
                    }
                }
            }
            else if(online == -1)
            {
                printf("you have been locked,you can use this system now\n");
            }
            else
            {
                login();
            }
        }
    }
}

// 查询航班
bool search(void)
{
    printf("start: \n");
    get_str(start,10);
    printf("end: \n");
    get_str(end,10);
    int i=0;
    search_num = 0;
    for(i=0; i<MAX_Flight; i++)
    {
        if(strlen(start) == 0 || strlen(end) == 0)
        {
            printf("start or end can‘t be empty\n");
            return false;
        }
        if(strcmp(FLI[i].start,start)==0 && strcmp(FLI[i].end,end)==0)
        {
            printf("fid:%s, ticket_num:%d\n",FLI[i].fid,FLI[i].fnum);
            strcpy(search_fid[search_num],FLI[i].fid);
            search_fnum[search_num] = FLI[i].fnum;
            //printf("search_fid[%d]:%s, search_fun[%d]:%d\n",search_num,search_fid[search_num],search_num,search_fnum[search_num]);
            ++search_num;
        }
        if(0 == search_num && i == MAX_Flight-1)
        {
            printf("no flight\n");
            return false;
        }
        if(search_num > 0 && i == MAX_Flight-1)
        {
            //show_flight();
            return true;
        }
    }
}

// 输出订单信息
void order_list(void)
{
    if(online == 1)
    {
        int i=0;
        for(i=0; i<MAX_Order; i++)
        {
            if(strcmp(online_pid,ORD[i].pid)==0)
            {
                //printf("online_pid:%s\n",online_pid);
                printf("fid:%s, pid:%s, ticket:%d\n",ORD[i].fid,ORD[i].pid,ORD[i].num);
            }
        }
    }
    else if(online == -1)
    {
        printf("you have been locked,you can use this system now\n");
    }
    else
    {
        login();
    }
}

// 删除订单
void del_order(void)
{
    if(online == 1)
    {
        char fid[20];
        printf("order_list:\n");
        order_list();
        printf("please entry del_order fid:");
        get_str(fid,20);
        int i=0;
        for(i=0; i<MAX_Order; i++)
        {
            if(strlen(fid)==0)  //判空
            {
                printf("del_order fid can‘t be empty\n");
                return;
            }
            if(strcmp(fid,ORD[i].fid)==0)
            {
                memset(ORD[i].pid,‘\0‘,sizeof(ORD[i].pid));
                int j=0;
                for(j=0; j<MAX_Flight; j++)
                {
                    if(strcmp(fid,FLI[j].fid)==0)
                    {
                        FLI[j].fnum++;  // 返还飞机票
                        break;
                    }
                }
                printf("delete success\n");
                return;
            }
        }
    }
    else if(online == -1)
    {
        printf("you have been locked,you can use this system now\n");
    }
    else
    {
        login();
    }

}

// 清理输入缓冲区
/*void clear_stdin(void)
{
    stdin->_IO_read_ptr = stdin->_IO_read_end;//清理输入缓冲区
}
*/

// 读取输入字符串
char* get_str(char* str,size_t len)
{
    if(NULL == str)
    {
        puts("empty ptr！");
        return NULL;
    }

    char *in=fgets(str,len,stdin);

    size_t cnt = strlen(str);
    if(‘\n‘ == str[cnt-1])
    {
        str[cnt-1] = ‘\0‘;
    }
    else
    {
        scanf("%*[^\n]");
        scanf("%*c");
    }
    
    //clear_stdin();

    return str;
}

// 获取cmd命令
char get_cmd(char start,char end)
{
    //clear_stdin();

    printf("please entry cmd:");
    while(true)
    {
        char val = getch();
        if(val >= start && val <= end)
        {
            printf("%c\n",val);
            return val;
        }
    }
}