前言

操作系统：Windows下运行。如果需要在Linux运行（单机版），则需要修改删除conio.h，自己写个头文件获取键盘输入。我已经写好了getch.h文件，需要将其导入使用。

开发环境：CodeBlocks || VS Code ( gcc编译）

开发语言：C

实现功能：登录，订票，退票

数据存储：文本读写

涉及文件：

文件构建可以参考：码云：传送门 GitHub：传送门

这几个信息文件不能少！！！少了程序跑不了！！！

程序主界面：

进入子功能需要账号和密码，存储在passenger.txt文件中

ps：文件数据的顺序就是结构体的顺序

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;

单机版（win）

注意头文件使用的conio.h，此版本为windows，linux参考前言的代码仓库

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
//#include "getch.h"
#include <conio.h>#define MAX_Flight 50   // 最大航班数
#define MAX_Passenger 20    // 单航班最多乘客数
#define MAX_Order 50    // 最大订票数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;    // 定义全局变量
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// 主函数
int main()
{init_sys();     // 系统初始化start_sys();    // 系统开始运行exit_sys();     // 系统结束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");// 以只读方式打开 order.txt,如果文件不存在则打开失败，返回值为空。FILE* ofrp = fopen("order.txt","r");if(NULL == ofrp)    // 打开失败直接退出{printf("order.txt open failed!\n");exit(0);}int i = 0;for(i = 0; i < MAX_Order; i++)   //读取文本中的数据到内存，全局变量ORD中{  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");if(NULL == ffrp){printf("flight.txt open failed!\n");exit(0);}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");if(NULL == pfrp){printf("passenger.txt open failed!\n");exit(0);}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')) // 获取键盘输入{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");}}// 以只写方式打开文件flight.txt，如果文件不存在则创建，如果文件存在则把内容清空。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);// 遍历所有乘客for(i = 0; i < MAX_Passenger; i++){// 数据长度校验if(strlen(entry_pid) == 0 || strlen(entry_pw) == 0){printf("pid or password can't be empty\n");time++;break;}// 成功匹配账号密码else if(strcmp(PAS[i].pid, entry_pid) == 0 && strcmp(PAS[i].password, entry_pw) == 0){printf("login success!\n");strncpy(online_pid, entry_pid, 20);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, PAS[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] = {0};char new_pname[10] = {0};char new_password[20] = {0};char new_tell[20] = {0};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);strncpy(PAS[i].pid, new_pid, 20);strncpy(PAS[i].pname, new_pname, 20);strncpy(PAS[i].password, new_password, 20);strncpy(PAS[i].tell, new_tell, 20);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1break;}}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;// 遍历所有航班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);strncpy(search_fid[search_num], FLI[i].fid, 20);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;// 遍历所有订单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;}}
}

TCP联网版（win）

先运行服务端，再运行客户端

因为懒，阉割了联网版的旅客信息修改功能。

编译参考

gcc server.c -lwsock32 -o server

效果如下：

client.c

同理这里也是Windows版本，使用winsock实现tcp

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
//#include "getch.h"
#include <conio.h>
#include <WinSock2.h>#pragma comment(lib,"ws2_32.lib")void start_sys(void);       // 系统开始运行
char *send_cmd_recv_val(char* cmd); // 发送命令，接收返回
void show_flight(void);     // 显示航班表
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
void search_start(void);    // 生成查询页面
char* search(void);         // 查询航班
void order_list(void);      // 生成订单表
void del_order(void);       // 退票
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(int argv, char* argc[])
{system("chcp 65001");printf("编码转换完毕\n");start_sys();exit_sys();return 0;
}// 发送命令，接收返回
char *send_cmd_recv_val(char* cmd)
{//初始化WSADATA wsaData;WSAStartup(MAKEWORD(2, 2), &wsaData);//创建套接字SOCKET clntSock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);//向服务器发送消息struct sockaddr_in sockAddr;memset(&sockAddr, 0, sizeof(sockAddr));            //每个字节都用0填充sockAddr.sin_family = PF_INET;sockAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");sockAddr.sin_port = htons(8888);connect(clntSock, (SOCKADDR*)& sockAddr, sizeof(SOCKADDR));static char buf[10240] = {0};// buf置0memset(buf, 0, sizeof(buf));send(clntSock, cmd, strlen(cmd) + sizeof(char), 0);recv(clntSock, buf, 10240, 0);//关闭套接字closesocket(clntSock);//终止dllWSACleanup();return buf;
}// 显示航班表
void show_flight(void)
{printf("%s\n", send_cmd_recv_val("show_flight"));
}// 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','6')) // 获取键盘输入{case '1': search_start(); break;case '2': order_list(); break;case '3': del_order(); break;case '4': passenger_info(); break;case '5': login(); break;case '6': logout(); break;case '0': return;}}
}// 系统结束
void exit_sys(void)
{printf("%s\n", send_cmd_recv_val("exit_sys"));
}// 生成主菜单
void menu(void)
{printf("\n");printf("*********************************\n");printf("|                               |\n");printf("|      飞机订票系统             |\n");printf("*      1.查询航班               *\n");  //查询航班printf("|      2.查询订票信息           |\n");   //查询订票信息printf("*      3.退订                   *\n");    //退订printf("|      4.查询旅客信息           |\n");   //查询旅客信息printf("|      5.用户登录               |\n");  //用户登录printf("*      6.用户登出               *\n");    //用户登出printf("|      0.退出系统               |\n");   //退出系统printf("|                               |\n");printf("*********************************\n");//printf("\n");
}// 登录
void login(void)
{char entry_pid[20]; //临时变量身份证char entry_pw[20];  //临时变量密码printf("请登录!\n");printf("请输入pid:");get_str(entry_pid, 20);printf("请输入密码:");get_str(entry_pw, 20);char buf[1024] = {0};snprintf(buf, 1024, "login pid:%s pw:%s", entry_pid, entry_pw);printf("%s\n", send_cmd_recv_val(buf));
}// 用户登出
void logout(void)
{printf("%s\n", send_cmd_recv_val("logout"));
}// 查询旅客信息
void passenger_info(void)
{printf("%s\n", send_cmd_recv_val("passenger_info"));
}// 开始查询航班
void search_start(void)
{char buf[10240] = {0};snprintf(buf, 10240, "%s", search());if(strncmp(buf, "起始地 或 目的地 不能为空\n", 50) != 0 && strncmp(buf, "没有航班\n", 50) != 0){printf("1.订票\n");printf("0.返回\n");char cmd = get_cmd('0', '1');memset(buf, 0, sizeof(buf));if(cmd == '0'){snprintf(buf, 10240, "%s", send_cmd_recv_val("0.返回"));printf("%s", buf);return;//start_sys();}else{snprintf(buf, 10240, "%s", send_cmd_recv_val("1.订票"));char fid[20];   // 选择的航班号printf("请输入fid:");get_str(fid, 20);snprintf(buf, 1024, "order_ticket fid:%s", fid);printf("%s\n", send_cmd_recv_val(buf));}}
}// 查询航班
char* search(void)
{char start[10] = {0};char end[10] = {0};printf("起始地: \n");get_str(start, 10);printf("目的地: \n");get_str(end, 10);char buf[1024] = {0};static char buf2[10240] = {0};memset(buf2, 0, sizeof(buf2));snprintf(buf, 1024, "search start:%s end:%s", start, end);snprintf(buf2, 10240, "%s", send_cmd_recv_val(buf));printf("%s", buf2);return buf2;
}// 输出订单信息
void order_list(void)
{printf("%s\n", send_cmd_recv_val("order_list"));
}// 删除订单
void del_order(void)
{printf("%s\n", send_cmd_recv_val("order_list"));char fid[20];printf("请输入要删除的fid:");get_str(fid, 20);char buf[1024] = {0};snprintf(buf, 1024, "del_order fid:%s", fid);printf("%s\n", send_cmd_recv_val(buf));
}// 读取输入字符串
char* get_str(char* str, size_t len)
{if(NULL == str){puts("空指针！");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("请输入命令:");while(true){char val = getch();if(val >= start && val <= end){printf("%c\n",val);return val;}}
}

server.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
//#include "getch.h"
#include <conio.h>
#include <WinSock2.h>
#pragma comment(lib,"ws2_32.lib")     //加载ws2_32.dll#define MAX_Flight 50   // 最大航班数
#define MAX_Passenger 20    // 单航班最多乘客数
#define MAX_Order 50    // 最大订票数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;    // 定义全局变量
Passenger *PAS;
Order *ORD;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char *get_request_content(char *src, char *content, int max_len); // 解析请求的内容
void init_sys(void);         // 系统初始化
char* show_flight(void);     // 显示航班表
void exit_sys(void);         // 退出系统
char* login(char* pid, char* pw);           // 登录
char* logout(void);          // 用户登出
char* passenger_info(void);  // 查询旅客信息
char* order_ticket(char* fid);   // 生成查询页面
char* search(char* start, char* end);            // 查询航班
char* order_list(void);      // 生成订单表
char* del_order(char* fid);      // 退票
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// 主函数
int main(int argv, char* argc[])
{system("chcp 65001");printf("编码转换完毕\n");// 系统初始化init_sys();// 初始化WSADATA wsaData;WSAStartup(MAKEWORD(2, 2), &wsaData);//创建套接字SOCKET servSock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);//绑定套接字struct sockaddr_in sockAddr;memset(&sockAddr, 0, sizeof(sockAddr));       //每个字节用0填充sockAddr.sin_family = PF_INET;               //使用ipv4sockAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");sockAddr.sin_port = htons(8888);         //端口bind(servSock, (SOCKADDR*)&sockAddr, sizeof(SOCKADDR));//进入监听状态listen(servSock, 20);char cmd[1024] = {0};char buf[10240] = {0};for(;;){// 接收客户端消息SOCKADDR clntAddr;int nSize = sizeof(SOCKADDR);SOCKET clntSock = accept(servSock, (SOCKADDR*)&clntAddr, &nSize);memset(cmd, 0, sizeof(cmd));memset(buf, 0, sizeof(buf));printf("收到客户端命令:");recv(clntSock, cmd, 1024, 0);printf("%s\n", cmd);if(NULL != strstr(cmd, "exit_sys")){//关闭套接字closesocket(clntSock);break;}else if(NULL != strstr(cmd, "search")){char* start = get_request_content(cmd, "start:", 20);char* end = get_request_content(cmd, "end:", 20);snprintf(buf, 10240, "%s", search(start, end));send(clntSock, buf, strlen(buf) + sizeof(char), 0);}else if(0 == strncmp(cmd, "1.订票", 10)){snprintf(buf, 1024, "订票...\n");send(clntSock, buf, strlen(buf) + sizeof(char), 0);}else if(0 == strncmp(cmd, "0.返回", 10)){snprintf(buf, 1024, "返回...\n");send(clntSock, buf, strlen(buf) + sizeof(char), 0);}else if(NULL != strstr(cmd, "order_ticket")){char* fid = get_request_content(cmd, "fid:", 20);snprintf(buf, 1024, "%s", order_ticket(fid));send(clntSock, buf, strlen(buf) + sizeof(char), 0);}else if(NULL != strstr(cmd, "order_list")){snprintf(buf, 10240, "%s", order_list());send(clntSock, buf, strlen(buf) + sizeof(char), 0);}else if(NULL != strstr(cmd, "del_order")){char* fid = get_request_content(cmd, "fid:", 20);snprintf(buf, 10240, "%s", del_order(fid));}else if(NULL != strstr(cmd, "passenger_info")){snprintf(buf, 10240, "%s", passenger_info());send(clntSock, buf, strlen(buf) + sizeof(char), 0);}else if(NULL != strstr(cmd, "login")){char* pid = get_request_content(cmd, "pid:", 20);char* pw = get_request_content(cmd, "pw:", 20);snprintf(buf, 10240, "%s", login(pid, pw));send(clntSock, buf, strlen(buf) + sizeof(char), 0);}else if(NULL != strstr(cmd, "logout")){snprintf(buf, 10240, "%s", logout());send(clntSock, buf, strlen(buf) + sizeof(char), 0);}else{snprintf(buf, 20, "错误命令!");send(clntSock, buf, strlen(buf) + sizeof(char), 0);}//关闭套接字closesocket(clntSock);}//关闭套接字closesocket(servSock);//终止dll使用WSACleanup();exit_sys();     // 退出系统return 0;
}// 解析请求的内容
char *get_request_content(char *src, char *content, int max_len)
{char *result = (char *)malloc((max_len) * sizeof(char));memset(result, 0, max_len);int i = 0;char *temp = NULL;temp = strstr(src, content);if (temp == NULL){return NULL;}temp += strlen(content);while (1){if (max_len == i)break;if (temp[i] != ' '){result[i] = temp[i];i++;}else{break;}}return result;
}// 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("系统初始化中...\n");// 以只读方式打开 order.txt,如果文件不存在则打开失败，返回值为空。FILE* ofrp = fopen("order.txt","r");if(NULL == ofrp)    // 打开失败直接退出{printf("order.txt 打开失败!\n");exit(0);}int i = 0;for(i = 0; i < MAX_Order; i++)   //读取文本中的数据到内存，全局变量ORD中{  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");if(NULL == ffrp){printf("flight.txt 打开失败!\n");exit(0);}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");if(NULL == pfrp){printf("passenger.txt 打开失败!\n");exit(0);}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);}printf("系统初始化完毕!\n");
}// 显示航班表
char* show_flight(void)
{static char buf[10240] = {0};memset(buf, 0, sizeof(buf));int i = 0;for(i = 0; i < MAX_Flight; i++){if(strlen(FLI[i].fid) != 0){snprintf(buf, 10240, "%sid:%s name:%s start:%s end:%s fnum:%d\n", buf, FLI[i].fid, FLI[i].fname, FLI[i].start, FLI[i].end, FLI[i].fnum);}}return buf;
}// 系统结束
void exit_sys(void)
{printf("数据插入中...\n");FILE* ofwp = fopen("order.txt","w");printf("准备插入 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");}}// 以只写方式打开文件flight.txt，如果文件不存在则创建，如果文件存在则把内容清空。FILE* ffwp = fopen("flight.txt","w");printf("准备插入 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("准备插入 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("程序退出\n");
}// 登录
char* login(char* pid, char* pw)
{static char buf[100] = {0};memset(buf, 0, sizeof(buf));if(online == 0)  //如果没有登录{int i = 0;int time = 0;// 遍历所有乘客for(i = 0; i < MAX_Passenger; i++){// 数据长度校验if(strlen(pid) == 0 || strlen(pw) == 0){printf("pid 或 password 不能为空\n");time++;break;}// 成功匹配账号密码else if(strcmp(PAS[i].pid, pid) == 0 && strcmp(PAS[i].password, pw) == 0){snprintf(buf , 100, "登录成功!\n");strncpy(online_pid, pid, 20);online = 1;return buf;}else if(i == MAX_Passenger-1){snprintf(buf , 100, "pid 或 password 错误\n");return buf;}}}else if(online == 1){snprintf(buf , 100, "你还没登录呢\n");return buf;}else{snprintf(buf , 100, "你已被锁定，禁止使用此系统\n");return buf;}}// 用户登出
char* logout(void)
{static char buf[100] = {0};memset(buf, 0, sizeof(buf));if(online == 1)  //如果已经登录{online = 0;snprintf(buf, 100, "登录成功\n");}else if(online == -1){snprintf(buf, 100, "你已被锁定，禁止使用此系统\n");}else{snprintf(buf, 100, "你还没有登录呢\n");}return buf;
}// 查询旅客信息
char* passenger_info(void)
{static char buf[100] = {0};memset(buf, 0, sizeof(buf));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){snprintf(buf, 100, "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){snprintf(buf, 100, "你已被锁定，禁止使用此系统\n");}else{snprintf(buf, 100, "你还没有登录呢\n");}return buf;
}// 订票
char* order_ticket(char* fid)
{static char buf[100] = {0};memset(buf, 0, sizeof(buf));if(online == 1) // 如果已经登录{if(0 == strlen(fid)){snprintf(buf, 100, "fid 为空\n");return buf;}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{snprintf(buf, 100, "订票成功\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1break;}}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("插入订票信息成功\n");break;}}return buf;}else if(strcmp(fid,search_fid[i]) == 0 && search_fnum[i] == 0){snprintf(buf, 100, "无票\n");return buf;}else if(i == MAX_Flight-1){snprintf(buf, 100, "不存在此fid\n");return buf;}}}else if(online == -1){snprintf(buf, 100, "你已被锁定，禁止使用此系统\n");return buf;}else{snprintf(buf, 100, "请登录!\n");return buf;}
}// 查询航班
char* search(char* start, char* end)
{printf("[函数()] 进入 search(%s, %s)\n", start, end);static char buf[10240] = {0};memset(buf, 0, sizeof(buf));int i = 0;search_num = 0;// 遍历所有航班for(i = 0; i < MAX_Flight; i++){if(strlen(start) == 0 || strlen(end) == 0){snprintf(buf, 10240, "start 或 end 不能为空\n");printf("%s", buf);return buf;}if(strcmp(FLI[i].start, start) == 0 && strcmp(FLI[i].end, end) == 0){snprintf(buf, 10240, "%sfid:%s, 票数:%d\n", buf, FLI[i].fid, FLI[i].fnum);strncpy(search_fid[search_num], FLI[i].fid, 20);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){snprintf(buf, 10240, "没有航班\n");printf("%s", buf);return buf;}if(search_num > 0 && i == MAX_Flight-1){printf("%s", buf);return buf;}}return buf;
}// 输出订单信息
char* order_list(void)
{static char buf[10240] = {0};memset(buf, 0, sizeof(buf));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);snprintf(buf, 10240, "%sfid:%s, pid:%s, ticket:%d\n", buf, ORD[i].fid, ORD[i].pid, ORD[i].num);}}}else if(online == -1){snprintf(buf, 100, "你已被锁定，禁止使用此系统\n");}else{snprintf(buf, 100, "请登录!\n");}return buf;
}// 删除订单
char* del_order(char* fid)
{printf("[函数()] 进入 del_order(%s)\n", fid);static char buf[100] = {0};memset(buf, 0, sizeof(buf));if(online == 1){int i = 0;// 遍历所有订单for(i = 0; i < MAX_Order; i++){if(strlen(fid) == 0)  //判空{snprintf(buf, 100, "del_order 的 fid 不能为空\n");return buf;}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;}}snprintf(buf, 100, "删除成功\n");return buf;}}}else if(online == -1){snprintf(buf, 100, "你已被锁定，禁止使用此系统\n");}else{snprintf(buf, 100, "请登录!\n");}printf("%s", buf);return buf;
}// 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("空指针！");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("请输入命令:");while(true){char val = getch();if(val >= start && val <= end){printf("%c\n",val);return val;}}
}

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C语言实现-航空订票系统（飞机订票系统）单机版联网版

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