2015-点餐系统（客户端）

博客：http://blog.csdn.net/muyang_ren
为什么做项目？
1、巩固之前所学的知识，查漏补缺
2、通过做项目，锻炼在实际项目中解决问题的能力
3、锻炼与他人合作的能力

客户端要求：
1、给服务器发请求
2、打印菜谱
3、下单
4、结账
5、入座
6、计算出客户订单的总价钱

服务器要求：
1、保存客户的信息
2、从数据库读出菜谱，发送给客户端
3、保存客户订单

项目职责：实现客户端
项目平台和技术：ubuntu 、socket、json、sqlite、多线程

head.h

/*************************************************************************
    > File Name: head.h
    > Author: 
    > Mail: 
    > Created Time: 2015年03月17日 星期二 19时13分33秒
 ************************************************************************/

#ifndef _DISPLAY_H
#define _DISPLAY_H

#include <pthread.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>          /* See NOTES */
#include <sys/socket.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <semaphore.h>
#include </usr/local/include/json/json.h>
#include <stddef.h>

extern void    hello_display();
extern void    * recv_from_server();
extern void    * send_to_server();
extern int     IS_table_condition_0(int , json_object *);
extern int     IS_menu_ID(int ,char *);
extern void    TO_server_order_11(int );
extern void    TO_server_order_12(int );
extern void    TO_server_order_21(int );
extern void    TO_server_order_22(int );
extern void    TO_server_order_31(int );
extern void    TO_server_order_41(int );
extern void    TO_server_order_51(int );
extern void    TO_server_order_23(int );

const  char *buf_cli;
const  char *menu_bak;
static char buf[BUFSIZ];       

//标志位初始化，使之进入发送函数 11选项
volatile static int  recv_server_num=0;  //标志步骤
volatile static int  send_server_num=11; //接收步骤
volatile static char flag = 0;           //线程异步标志
volatile static int  reminder_flag=0;    //催单标志
struct json_object* cli_table_choice;    //客户保存的桌号
struct json_object* cli_menu_choice;     //客户保存的菜单
struct json_object* cli_add_menu;        //客户加菜的菜单
#endif

cli_main.c

/*************************************************************************
> File Name: 点菜系统主函数main
> Author: 梁惠涌
> Mail: 
> Created Time: 2015年03月17日 星期二 15时51分18秒
************************************************************************/

#include "head.h"

int main(int argc, char *argv[]){

    int cli_fd;                              //socket返回值
    struct sockaddr_in servaddr;
    cli_menu_choice  = json_object_new_array();

    if( argc != 2 ){
        printf("\t usage: %s <server_IP>\n", argv[0]);
        exit(-1);
    }

    //创建套接字
    if((cli_fd=socket(AF_INET, SOCK_STREAM, 0))==-1){
        perror("socket");
        exit(-1);
    }

    //填充IP和端口号
    bzero(&servaddr,sizeof(servaddr));
    servaddr.sin_family = AF_INET;
    servaddr.sin_port = htons(8888);
    servaddr.sin_addr.s_addr = inet_addr(argv[1]);

    //调用connect函数，与服务器连接
    if(connect(cli_fd,(struct sockaddr *)&servaddr, sizeof(servaddr)) < 0 ){
        printf("连接失败！\n");
        exit(-1);
    }

/*--------------------(1)欢迎界面4秒显示------------------*/
    hello_display();

/*--------------------(2)创建线程1-------------------------*/
    static pthread_t thread_tid1, thread_tid2;              //定义线程标识符

    //创建线程接收服务器数据并处理
    if(pthread_create(&thread_tid1, NULL, recv_from_server, (void *)&cli_fd) < 0){
        perror("pthread_tid1");
        exit(-1);
 }

/*--------------------(3)创建线程2-------------------------*/
   //创建线程发送数据到服务器并处理
    if(pthread_create(&thread_tid2, NULL, send_to_server, (void *)&cli_fd)  < 0){
        perror("pthread_tid2");
        exit(-1);
    }

    pthread_join(thread_tid1, NULL);
    pthread_join(thread_tid2, NULL);

    return 0;
}

display.c

/*************************************************************************
> File Name: display.c
> Author: 
> Mail: 
> Created Time: 2015年03月17日 星期二 18时35分28秒
************************************************************************/
#include "head.h"

/*--------------------------(1)欢迎界面----------------------------------*/
void  hello_display(){
    system("clear");
    printf("       ***********************************************************\n");
    printf("       *                 欢迎光临 · 霸王餐                       *\n");
    printf("       *                                                         *\n");
    printf("       *                                                         *\n");
    printf("       *               用餐时间段： 早上8:00--凌晨               *\n");
    printf("       *    ————                                                 *\n");
    printf("       *  | 霸王 |    (1)确保点餐客户就席十分钟饭菜上桌          *\n");
    printf("       *  | 条款 |    (2)不采用赊账制度，现金、刷卡、支付宝      *\n");
    printf("       *    ————                                                 *\n");
    printf("       *                                                         *\n");
    printf("       *       打个小广告：本店《龙凤双脚》什么的最好吃了        *\n");
    printf("       ***********************************************************\n");
    sleep(2);

}

//-----------------------------显示桌位并选座函数------------------------------------
void table_display(char table_buf[]){
    static int i, j, table_flag1 = 0;
    const char *table_id1_str, *table_varities_str, *table_site_str, *table_condition_str;

    //字符流解包成json对象
    json_object *jiebao_table1, *jiebao_table_all;
    json_object *jiebao_table_id1, *jiebao_table_varities, *jiebao_table_site, *jiebao_table_condition;

    jiebao_table_all=json_tokener_parse(table_buf);

    //显示桌位
    system("clear");
    printf("       |---------------------------------------------------------|\n");
    printf("       |                  不为别的，我只为嘴强王者               |\n");
    printf("       |                       嘴·强·王·座                       |\n");

    for(i=0; i<json_object_array_length(jiebao_table_all);i++){
        jiebao_table1 = json_object_array_get_idx(jiebao_table_all,i);

        jiebao_table_id1 = json_object_object_get(jiebao_table1,"id1");      
        jiebao_table_varities = json_object_object_get(jiebao_table1,"varities");      
        jiebao_table_site = json_object_object_get(jiebao_table1,"site");      
        jiebao_table_condition = json_object_object_get(jiebao_table1,"condition");      

        table_id1_str=json_object_get_string(jiebao_table_id1);
        table_varities_str=json_object_get_string(jiebao_table_varities);
        table_site_str=json_object_get_string(jiebao_table_site);
        table_condition_str=json_object_get_string(jiebao_table_condition);

        if(!strcmp(table_condition_str,"0")){
            printf("       |          ID:%2s\t\t%s\t\t%s             |\n",table_id1_str,table_varities_str,table_site_str);
           table_flag1 = 1;
        }
    }
    printf("       |---------------------------------------------------------|\n");

    //选座部分
    //cli_table_choice保存选择好的桌位包
    if(table_flag1 == 0){
        printf("\n\n\n                 对不起，暂时满座！\n");
        exit(0);
    }
    while(table_flag1){
        printf("\n\n请选择桌位ID：\n");

        scanf("%d",&j);
        getchar();             //清除回车键
        if(IS_table_condition_0(j, jiebao_table_all) == 1){
            cli_table_choice = json_object_array_get_idx(jiebao_table_all, j-1);
            break;
        }else{
            printf("                  已被预定，请再选佳座！\n");
        }
    } 
}

//-------------------------------------------判断桌位是否为空
int IS_table_condition_0(int j, json_object *jiebao_table_all){
    const char *IS_table_condition_num;

    //字符流解包成json对象
    json_object *IS_table, *is_table_condition;

    IS_table = json_object_array_get_idx(jiebao_table_all,j-1);
    is_table_condition = json_object_object_get(IS_table,"condition");      
    IS_table_condition_num=json_object_get_string(is_table_condition);

    if(!strcmp(IS_table_condition_num , "0")){
        return 1;
    }else  
        return 0;
}

//-----------------------------显示主菜单函数------------------------------------
void menu_display(char menu_buf[]){
    static int i;
    const char *menu_id1_str, *menu_foodname_str, *menu_prices_str;

    //字符流解包成json对象
    json_object *jiebao_menu1, *jiebao_menu_all;
    json_object *jiebao_menu_id1, *jiebao_menu_foodname, *jiebao_menu_prices;

    jiebao_menu_all=json_tokener_parse(menu_buf);

    //显示菜单
    system("clear");
    printf("       |---------------------------------------------------------|\n");
    printf("       |                       嘴·强·菜·谱                       |\n");

    for(i=0; i<json_object_array_length(jiebao_menu_all);i++){
        jiebao_menu1 = json_object_array_get_idx(jiebao_menu_all,i);

        jiebao_menu_id1      = json_object_object_get(jiebao_menu1,"id1");      
        jiebao_menu_foodname = json_object_object_get(jiebao_menu1,"foodname");      
        jiebao_menu_prices   = json_object_object_get(jiebao_menu1,"prices");      

        menu_id1_str      =  json_object_get_string(jiebao_menu_id1);
        menu_foodname_str =  json_object_get_string(jiebao_menu_foodname);
        menu_prices_str   =  json_object_get_string(jiebao_menu_prices);

        printf("       |          ID:%-8s\t%-15s\t%-8s         |\n",menu_id1_str,menu_foodname_str,menu_prices_str);
    }
    printf("       |---------------------------------------------------------|\n");

    //点菜部分
    //cli_menu_choice保存选择好的菜单
    int menu_id;
    json_object *menu;
    struct json_object* json_menu_new;

    json_menu_new    = json_object_new_object();
    cli_menu_choice  = json_object_new_array();

    printf("       |     请输入一个ID后“回车”，输入  9999  提交点菜名单      |\n");
    printf("       |---------------------------------------------------------|\n");
    scanf("%d", &menu_id);
    while(menu_id != 9999){   
        if(IS_menu_ID(menu_id,menu_buf) && (menu_id > 0)){
            json_menu_new = json_object_array_get_idx(jiebao_menu_all ,menu_id-1);
            json_object_array_add(cli_menu_choice,json_menu_new);

            menu=json_object_object_get(json_menu_new,"foodname");
            printf("已点菜： %s \n",json_object_to_json_string(menu));
            scanf("%d", &menu_id);
            getchar();
        }else{
            printf("\t\t亲，新菜即将推出！\n");
            printf("重新输入ID：\n");
            scanf("%d",&menu_id);
            getchar();

        }
    }

    menu_bak = json_object_get_string(cli_menu_choice);
system("clear");
    printf("       |---------------------------------------------------------|\n");
    printf("       |                 正在提交菜单......                      |\n");
    printf("       |---------------------------------------------------------|\n");

    sleep(1);
}

//-------------------------------------------判断是否有菜
int IS_menu_ID(int j_menu,char menu_buf_id[]){
    //字符流解包成json对象
    json_object *is_menu_all, *is_menu_obj;

    is_menu_all = json_tokener_parse(menu_buf_id);
    is_menu_obj = json_object_array_get_idx(is_menu_all, j_menu-1);

    if(is_menu_obj != NULL){
        return 1;
    }else  
        return 0;
}

//-----------------------------显示订座成功信息函数------------------------------------
void table_OK_display(){
    //显示菜单
    system("clear");
    printf("       |---------------------------------------------------------|\n");
    printf("       |                  不为别的，我只为嘴强王者               |\n");
    printf("       |                                                         |\n");
    printf("       |                                                         |\n");
    printf("       |                                                         |\n");
    printf("       |                                                         |\n");
    printf("       |                    欢迎入座：订座成功                   |\n");
    printf("       |                                                         |\n");
    printf("       |                                                         |\n");
    printf("       |                                                         |\n");
    printf("       |                                                         |\n");
    printf("       |                                                         |\n");
    printf("       |                                                         |\n");
    printf("       |---------------------------------------------------------|\n");
    sleep(1);
}

void reminder_display(){
    system("clear");
    static int i_r, j_r=1; 
    printf("                                                             \n");
    printf("                                                             \n");
    printf("                               敬请用餐                      \n");
    printf("                                                             \n");
    printf("                               功能服务                      \n");
    printf("                                                             \n");
    printf("               1、催单          2、加菜        3、结账       \n");
    printf("                                                             \n");
    printf("                                                             \n");
sleep(1);
    while(j_r){
        scanf("%d",&i_r);
        getchar();
        switch(i_r){
            printf("wo jiao switch\n");
            case 1:{                          //进入发送线程 --催单（31）
                j_r=0; i_r=0;
                send_server_num = 31;
                flag  = 0;
                break;
            }
            case 2:{                          //进入接收线程 --加菜（也叫点菜）
                j_r=0; i_r=0;
                recv_server_num = 23;
                flag = 1;
                    break;
                   }
            case 3:{
                j_r=0; i_r=0;
                recv_server_num = 41;         //进入接收线程 --结账
                flag = 1;
                break;
            }
        }
    }
 j_r=1;
}
//-----------------------------结账函数------------------------------------
void cost_display(){
    static int   i;
    const  char  *cost_foodname_str;
    static int   cost, all_cost=0;

    //字符流解包成json对象
    json_object *jiebao_cost1,*jiebao_menu_bak;
    json_object *jiebao_cost_foodname, *jiebao_cost_prices;
    jiebao_cost1 = json_object_new_object();

    //解包
    jiebao_menu_bak = json_tokener_parse(menu_bak);

    //显示菜单
    system("clear");
    printf("       |---------------------------------------------------------|\n");
    printf("       |                  你确定你不是来吃霸王餐？？？           |\n");
    printf("       |                                                         |\n");

    for(i=0; i<json_object_array_length(jiebao_menu_bak); i++){
        jiebao_cost1 = json_object_array_get_idx(jiebao_menu_bak,i);
        jiebao_cost_foodname = json_object_object_get(jiebao_cost1,"foodname");      
        jiebao_cost_prices   = json_object_object_get(jiebao_cost1,"prices");      
                      cost   = json_object_get_int(jiebao_cost_prices);      
                  all_cost   = all_cost+cost;
           cost_foodname_str =  json_object_get_string(jiebao_cost_foodname);

    printf("       |          菜名  :%-15s\t     ￥：%-8d        |\n",cost_foodname_str, cost);
    }
    printf("       |          总价  :%-8d RMB                            |\n",all_cost);
    printf("       |---------------------------------------------------------|\n\n\n");
   // sleep(3);
}


void good_bye_display(){
    system("clear");
    printf("       |---------------------------------------------------------|\n");
    printf("       |                                                         |\n");
    printf("       |                     欢迎下次光临！                      |\n");
    printf("       |                                                         |\n");
    printf("       |---------------------------------------------------------|\n");

}

void add_menu_display(char add_menu_buf[]){
    static int i_menu;
    const char *add_menu_id1_str, *add_menu_foodname_str, *add_menu_prices_str;

    //定义json对象
    json_object *jiebao_add_menu1, *jiebao_add_menu_all;
    json_object *jiebao_add_menu_id1, *jiebao_add_menu_foodname, *jiebao_add_menu_prices;

    jiebao_add_menu_all=json_tokener_parse(add_menu_buf);

    //显示菜单
    system("clear");
    printf("       |---------------------------------------------------------|\n");
    printf("       |                    胃口好才是真的好                     |\n");

    for(i_menu= 0; i_menu<json_object_array_length(jiebao_add_menu_all); i_menu++){
        jiebao_add_menu1 = json_object_array_get_idx(jiebao_add_menu_all,i_menu);

        jiebao_add_menu_id1      = json_object_object_get(jiebao_add_menu1,"id1");      
        jiebao_add_menu_foodname = json_object_object_get(jiebao_add_menu1,"foodname");      
        jiebao_add_menu_prices   = json_object_object_get(jiebao_add_menu1,"prices");      

        add_menu_id1_str      =  json_object_get_string(jiebao_add_menu_id1);
        add_menu_foodname_str =  json_object_get_string(jiebao_add_menu_foodname);
        add_menu_prices_str   =  json_object_get_string(jiebao_add_menu_prices);

        printf("       |       ID:%-8s\t%-15s\t%-8s         |\n",add_menu_id1_str, add_menu_foodname_str,add_menu_prices_str);
    }
    printf("       |---------------------------------------------------------|\n");

    //加菜部分
    //cli_add_menu 保存增加的菜单
    int add_menu_id;
    json_object *add_menu;
    struct json_object* json_add_menu_new;

    json_add_menu_new    = json_object_new_object();
    cli_add_menu         = json_object_new_array();

    printf("       |     请输入一个ID后“回车”，输入  9999  提交加菜名单      |\n");
    printf("       |---------------------------------------------------------|\n");
    scanf("%d", &add_menu_id);
    while(add_menu_id != 9999){   
        if(IS_menu_ID(add_menu_id,add_menu_buf) && (add_menu_id > 0)){
            json_add_menu_new = json_object_array_get_idx(jiebao_add_menu_all ,add_menu_id-1);
            json_object_array_add(cli_add_menu,json_add_menu_new);

            add_menu=json_object_object_get(json_add_menu_new,"foodname");
            printf("已新加菜单： %s \n",json_object_to_json_string(add_menu));
            scanf("%d", &add_menu_id);
            getchar();
        }else{
            printf("\t\t亲，新菜即将推出！\n");
            printf("重新输入ID：\n");
            scanf("%d",&add_menu_id);
            getchar();

        }
    }

//将新增菜单加入用户菜单
    static int i_add;
    json_object *jiebao_new_menu1, *jiebao_menu_all_old;
    //(1)
    jiebao_new_menu1  = json_object_new_object();
    jiebao_menu_all_old=json_tokener_parse(menu_bak);    //之前选好的菜单
    //(2)
    //将新增的菜单放进jiebao_menu_all_old json数组
    for(i_add= 0; i_add<json_object_array_length(cli_add_menu); i_add++){
        jiebao_new_menu1 = json_object_array_get_idx(cli_add_menu,i_add);
        json_object_array_add(jiebao_menu_all_old,jiebao_new_menu1);
    }
    //(3)

    menu_bak = json_object_get_string(jiebao_menu_all_old);


    system("clear");
    printf("       |---------------------------------------------------------|\n");
    printf("       |                 正在提交菜单......                      |\n");
    printf("       |---------------------------------------------------------|\n");

    sleep(1);
}

/*--------------------------(2)接收数据线程调用函数--------------------------------*/
void *recv_from_server(void* arg1){
    int cli_fd1;
    cli_fd1 = *((int *)arg1);

    while(1){
        if(flag== 1){
            switch(recv_server_num){
                case 11:{                            
                    bzero(buf,sizeof(buf));
                    recv(cli_fd1, buf, sizeof(buf), 0);
                    table_display(buf);              //显示桌位、选座
                    send_server_num=12;              //进入发送端发送选座数据包
                    flag =0;break;                   //跳转发送数据端
                }
                case 12:{
                    table_OK_display();              //显示订座成功信息
                    send_server_num =21;             //进入发送端发送21命令
                    flag=0;
                    break;                  
                }
                case 21:{
                    bzero(buf,sizeof(buf));
                    recv(cli_fd1, buf, sizeof(buf), 0);
                    menu_display(buf);               //显示菜单信息
                    send_server_num =22;             //进入菜单数据包
                    flag =0;
                    break;
                }
                case 22:{
                    reminder_display();              //催单、加菜、结账界面
                    break;
                }
                case 23:{

                    add_menu_display(buf);          //加菜界面
                    send_server_num=23;
                    flag = 0;
                    break;
                }
                case 41:{
                    cost_display();              //结账界面
                    send_server_num = 41;
                    flag = 0;
                    break; 
                }
            }
        }
    }
    return NULL;
}

/*--------------------------(3)发送数据线程调用函数--------------------------------*/
void *send_to_server(void *arg2){
    int cli_fd2;
    cli_fd2 = *((int *)arg2);
    send_server_num = 11;
    while(1){   
        while(flag == 0){
            switch(send_server_num){
                case 11:{                          //发送 桌位--查询(信号)      
                    TO_server_order_11(cli_fd2); 
                    recv_server_num = 11;  
                    flag=1;break;
                }
                case 12:{                          //发送 桌位--订座(信号)
                    TO_server_order_12(cli_fd2);
                    recv_server_num = 12;
                    flag=1;break; 
                }
                case 21:{
                    TO_server_order_21(cli_fd2);   //发送 菜谱--查询(信号)
                    recv_server_num = 21;
                    flag=1;
                    break;
                }

                case 22:{                   
                    TO_server_order_22(cli_fd2);   //发送 菜谱--下单(信号)
                    recv_server_num = 22;
                    flag=1;break;
                }
                case 23:{                   
                    TO_server_order_23(cli_fd2);   //发送 菜谱--加菜(信号)
                    recv_server_num = 22;
                    flag=1;break;
                }

                case 31:{
                    TO_server_order_31(cli_fd2);   //催单（信号）
                    recv_server_num = 22;
                    flag=1;break;
                }
                case 41:{
                    TO_server_order_41(cli_fd2);   //结账 （信号）
                    sleep(1);
                    send_server_num = 51;
                    flag = 0;break;
                }
                case 51:{
                    sleep(0.5);
                    TO_server_order_51(cli_fd2);   //退出 （信号）
                    sleep(3);
                    good_bye_display();

                    exit(0);
                }
            }
        }
    }
    return NULL;
}

order_to_server.c

/*************************************************************************
    > File Name: order_to_server.c
    > Author: 
    > Mail: 
    > Created Time: 2015年03月19日 星期四 11时44分32秒
 ************************************************************************/

#include "head.h"

//发送
/*-----------------------------------------------------------
*   相关协议：两位数，第一位表示功能：
*   1：选座     2：菜谱     3：催单    4：结账
*  
*   第二位表示功能：
*   选座1： 1：查询   2：订座   3：换位
*   菜谱2： 1：查询   2：下单   
*   催单3： 1：催单
*   结账4： 1：申请结账
*
------------------------------------------------------------*/
void TO_server_order_11(int cli_fd2){
    //发送协议查询桌位情况
    struct json_object *json_obj;
    struct json_object *json_shuzhu;

    json_obj=json_object_new_object();
    json_object_object_add(json_obj,"fla",json_object_new_int(11));

    json_shuzhu=json_object_new_array();
    json_object_array_add(json_shuzhu,json_obj);
    buf_cli=json_object_to_json_string(json_shuzhu);
    if(send(cli_fd2, buf_cli, strlen(buf_cli), 0) < 0){
        perror("send");
        exit(-1);
    }
    json_object_put(json_obj);
    json_object_put(json_shuzhu);


}
void TO_server_order_12(int cli_fd2){
    //-----------------------------(1)发送订座信号
    //发送协议查询桌位情况
    struct json_object *json_table;
    struct json_object *json_table_shuzhu;
    json_table=json_object_new_object();
    json_object_object_add(json_table,"fla",json_object_new_int(12));
   //将命令12与选好的桌号发送给服务器
    //将cli_table_choice和json_table对象放进 json_table_shuzhu里
    json_table_shuzhu=json_object_new_array();
    json_object_array_add(json_table_shuzhu,json_table);
    json_object_array_add(json_table_shuzhu,cli_table_choice);
    buf_cli=json_object_to_json_string(json_table_shuzhu);
  if(send(cli_fd2, buf_cli, strlen(buf_cli), 0) < 0){
        perror("send");
        exit(-1);
    }

    //释放json对象
    json_object_put(json_table);
    json_object_put(json_table_shuzhu);
}

void TO_server_order_21(int cli_fd2){
    //发送协议查询桌位情况
    struct json_object *json_obj;
    struct json_object *json_shuzhu;

    json_obj=json_object_new_object();
    json_object_object_add(json_obj,"fla",json_object_new_int(21));

    json_shuzhu=json_object_new_array();
    json_object_array_add(json_shuzhu,json_obj);
    buf_cli=json_object_to_json_string(json_shuzhu);
   if(send(cli_fd2, buf_cli, strlen(buf_cli), 0) < 0){
        perror("send");
        exit(-1);
    }
    json_object_put(json_obj);
    json_object_put(json_shuzhu);

}
void TO_server_order_22(int cli_fd2){
    //-----------------------------(1)发送订座信号
    //发送协议查询桌位情况
    static int i;
    struct json_object *json_menu;
    struct json_object *json_menu_shuzhu;
    json_menu=json_object_new_object();
    json_object_object_add(json_menu,"fla",json_object_new_int(22));

    //将命令12与选好的桌号发送给服务器
    //将cli_table_choice和json_table对象放进 json_table_shuzhu里
    json_menu_shuzhu=json_object_new_array();
    json_object_array_add(json_menu_shuzhu,json_menu);
    for(i=0;i<json_object_array_length(cli_menu_choice);i++){
        json_object_array_add(json_menu_shuzhu,json_object_array_get_idx(cli_menu_choice,i));
    }
    buf_cli=json_object_to_json_string(json_menu_shuzhu);
    if(send(cli_fd2, buf_cli, strlen(buf_cli), 0) < 0){
        perror("send");
        exit(-1);
    }

    system("clear");
    printf("\n\n\n\t\t\t已向服务台提交菜单，片刻就好!\n");
    sleep(1);
    //释放json对象
    json_object_put(json_menu);
    json_object_put(json_menu_shuzhu);
}

void TO_server_order_23(int cli_fd2){
    //-----------------------------(1)发送订座信号
    //发送协议查询桌位情况
    static int i;
    struct json_object *json_menu;
    struct json_object *json_menu_shuzhu;
    json_menu=json_object_new_object();
    json_object_object_add(json_menu,"fla",json_object_new_int(23));

    //将命令12与选好的桌号发送给服务器
    //将cli_table_choice和json_table对象放进 json_table_shuzhu里
    json_menu_shuzhu=json_object_new_array();
    json_object_array_add(json_menu_shuzhu,json_menu);
    for(i=0;i<json_object_array_length(cli_add_menu);i++){
        json_object_array_add(json_menu_shuzhu,json_object_array_get_idx(cli_add_menu,i));
    }
    buf_cli=json_object_to_json_string(json_menu_shuzhu);
    if(send(cli_fd2, buf_cli, strlen(buf_cli), 0) < 0){
        perror("send");
        exit(-1);
    }

    system("clear");
    printf("\n\n\n\t\t\t已向服务台提交新增菜单，片刻就好!\n\n\n");
    sleep(1);
    //释放json对象
    json_object_put(json_menu);
    json_object_put(json_menu_shuzhu);
}

void TO_server_order_31(int cli_fd2){
    //发送协议查询桌位情况
    struct json_object *json_obj;
    struct json_object *json_shuzhu;

    json_obj=json_object_new_object();
    json_object_object_add(json_obj,"fla",json_object_new_int(31));

    json_shuzhu=json_object_new_array();
    json_object_array_add(json_shuzhu,json_obj);
    buf_cli=json_object_to_json_string(json_shuzhu); 
    send(cli_fd2, buf_cli, strlen(buf_cli), 0);

    system("clear");
    printf("\n\n\n\t\t已提交服务台，佳肴马上就好......\n\n\n");
    sleep(1);
    json_object_put(json_obj);
    json_object_put(json_shuzhu);

}
void TO_server_order_41(int cli_fd2){
    static int   i, all_prices=0, prices=0;

//1、获取总价
    //字符流解包成json对象
    json_object *jiebao_prices1,*jiebao_menu_bak;
    json_object *jiebao_cost_prices;
    jiebao_prices1 = json_object_new_object();

    //解包
    jiebao_menu_bak = json_tokener_parse(menu_bak);


    for(i=0; i<json_object_array_length(jiebao_menu_bak); i++){
        jiebao_prices1 = json_object_array_get_idx(jiebao_menu_bak,i);
        jiebao_cost_prices   = json_object_object_get(jiebao_prices1,"prices");      
                    prices   = json_object_get_int(jiebao_cost_prices);      
                all_prices   = all_prices+prices;
    }
//2、发送结账协议
    //发送协议查询桌位情况
    struct json_object *json_obj;
    struct json_object *json_shuzhu;
    struct json_object *json_prices;

    json_obj=json_object_new_object();
    json_prices=json_object_new_object();
    json_object_object_add(json_obj,"fla",json_object_new_int(41));
    json_object_object_add(json_prices,"prices",json_object_new_int(all_prices));

    json_shuzhu=json_object_new_array();
    json_object_array_add(json_shuzhu,json_obj);
    json_object_array_add(json_shuzhu,json_prices);
    buf_cli=json_object_to_json_string(json_shuzhu); 
    send(cli_fd2, buf_cli, strlen(buf_cli), 0);

    printf("\n\n\n\t\t已申请结账，服务员马上就到！\n\n\n");
    json_object_put(json_obj);
    json_object_put(json_shuzhu);
    json_object_put(json_prices);

}
void TO_server_order_51(int cli_fd2){
    //发送协议查询桌位情况
    struct json_object *json_obj;
    struct json_object *json_shuzhu;

    json_obj=json_object_new_object();
    json_object_object_add(json_obj,"fla",json_object_new_int(51));

    json_shuzhu=json_object_new_array();
    json_object_array_add(json_shuzhu,json_obj);
    buf_cli=json_object_to_json_string(json_shuzhu); 
    send(cli_fd2, buf_cli, strlen(buf_cli), 0);

    json_object_put(json_obj);
    json_object_put(json_shuzhu);

}

Makefile

#自动编译多个.c构成的项目,即把所有的.c编译成同一个可执行文件
CC:=gcc
CFLAGS:=-Wall -g -lpthread -ljson
SRC:=${wildcard *.c} #将当前目录下的以.c为后缀的文件名赋给SRC
OBJ:=${patsubst %.c,%.o,$(SRC)}#将Src中以.c为后缀的字符串替换成.o为后缀赋给OBJ

client:$(OBJ) 
    $(CC) -o $@ $^ $(CFLAGS)


%.o:%.c myhead.h
    $(CC) -o $@ -c $< $(CFLAGS) 

.PHONY:clean print
clean:
    rm -f *.o test .*.sw?
print:
    @echo $(SRC)
    @echo $(OBJ)