Question

我正在尝试开发一个服务器应用程序，从客户端获取英语单词，而不是将其翻译为土耳其语单词。服务器应该在翻译过程中使用litesql。在此过程中，数据库应至少具有以下键值对：

键：值
一：bir
二：iki
三：uc
四：dort
五：bes
六：alti
七：yedi
八：sekiz
九：dokuz
十：

每当我尝试编译此代码时，我都会收到以下错误代码：

21701047@db:~$ gcc threadv1.c -o threadv1 -lpthread
/tmp/ccMnTKvk.o: In function `Child':
threadv1.c:(.text+0x54): undefined reference to `sqlite3_open'
threadv1.c:(.text+0x6c): undefined reference to `sqlite3_errmsg'
collect2: error: ld returned 1 exit status

代码

#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <resolv.h>
#include <arpa/inet.h>
#include <pthread.h>
#include <stdio.h>
#include <sqlite3.h>

/* Definations */
#define DEFAULT_BUFLEN 1024
#define PORT 1888

void PANIC(char* msg);
#define PANIC(msg)  { perror(msg); exit(-1); }

/*--------------------------------------------------------------------*/
/*--- Child - echo server                                         ---*/
/*--------------------------------------------------------------------*/
void* Child(void* arg)
{   char line[DEFAULT_BUFLEN];
    int bytes_read;
    int client = *(int *)arg;
    char* f_name = "translator.db";
     sqlite3 *db;
     char *zErrMsg = 0;
     int rc;
     char *sql;

            printf("[server] send %s to the client...", f_name);
             rc = sqlite3_open("translator.db", &db);
             if( rc ) {
             fprintf(stderr, "Can't open database: %s\n",  sqlite3_errmsg(db));
                exit(1);
            }
           do
           {
             bytes_read = recv(client, line, sizeof(line), rc);
            if (bytes_read > 0) {
                if ( (bytes_read=send(client, line, bytes_read, 0)) < 0 ) {
                        printf("Send failed\n");
                        break;
                }
        } else if (bytes_read == 0 ) {
                printf("Connection closed by client\n");
                break;
        } else {
                printf("Connection has problem\n");
                break;
        }
 } while (bytes_read > 0);
    close(client);
    return arg;
}
/*--------------------------------------------------------------------*/
/*--- main - setup server and await connections (no need to clean  ---*/
/*--- up after terminated children.                                ---*/
/*--------------------------------------------------------------------*/
int main(int argc, char *argv[])
{   int sd,opt,optval;
    struct sockaddr_in addr;
    unsigned short port=0;

    while ((opt = getopt(argc, argv, "p:")) != -1) {
        switch (opt) {
        case 'p':
                port=atoi(optarg);
                break;
        }
    }


    if ( (sd = socket(PF_INET, SOCK_STREAM, 0)) < 0 )
        PANIC("Socket");
    addr.sin_family = AF_INET;

    if ( port > 0 )
                addr.sin_port = htons(port);
    else
                addr.sin_port = htons(PORT);

    addr.sin_addr.s_addr = INADDR_ANY;

   // set SO_REUSEADDR on a socket to true (1):
   optval = 1;
   setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof optval);


    if ( bind(sd, (struct sockaddr*)&addr, sizeof(addr)) != 0 )
        PANIC("Bind");
    if ( listen(sd, SOMAXCONN) != 0 )
        PANIC("Listen");

    printf("System ready on port %d\n",ntohs(addr.sin_port));

    while (1)
    {
        int client, addr_size = sizeof(addr);
        pthread_t child;

        client = accept(sd, (struct sockaddr*)&addr, &addr_size);
        printf("Connected: %s:%d\n", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
        if ( pthread_create(&child, NULL, Child, &client) != 0 )
            perror("Thread creation");
        else
            pthread_detach(child);  /* disassociate from parent */
    }
    return 0;
}

未定义引用`sqlite3_open'strreadv1.c :(。text + 0x6c）：未定义引用`sqlite3_errmsg'colle2：错误：ld返回1退出状态

0 个答案: