libmemcached的memcached_set（）失败

Question

我是libmemcached的新手，在memcached_set行面临以下问题，如果有人有解决方案，请帮助我。显示错误：无法存储密钥：getaddrinfo或getnameinfo HOSTNAME LOOKUP FAILURE。我能够使用win32 API LoadLibrary和GetProcAddress调用libmemcached.dll方法。

   #include "..\libmemcached-1.0\memcached.h"

         int main()
        {

     typedef memcached_st*(__cdecl *MYPROC)(memcached_st*);    
        typedef memcached_server_list_st(__cdecl *mem_server_lis_app)(memcached_server_list_st, const char *, in_port_t, memcached_return_t *);    
        typedef memcached_return_t(__cdecl *memc_server_push)(memcached_st *, const memcached_server_list_st);
        typedef const char* (__cdecl *memcached_err)(const memcached_st *, memcached_return_t );    
        typedef memcached_return_t(__cdecl *memcach_set)(memcached_st *ptr, const char *key, size_t key_length, const char *, size_t, time_t, uint32_t);
            struct memcached_server_st *servers = NULL;
            struct memcached_st *memc=NULL;
            memcached_return_t rc;
            char *key = (char*)"keystring";
            char *value = (char*)"keyvalue";
            char *retrieved_value;
            size_t value_length;
            uint32_t flags;

            HINSTANCE hinstLib;

            BOOL fFreeResult, fRunTimeLinkSuccess = FALSE;


            hinstLib = LoadLibrary(TEXT("libmemcached.dll"));

            if (hinstLib != NULL)
            {

                MYPROC ProcAdd;
                ProcAdd = (MYPROC)GetProcAddress(hinstLib, "memcached_create");
                if (NULL != ProcAdd)
                {
                    fRunTimeLinkSuccess = TRUE;
                    memc = (ProcAdd)(NULL);
                }

                mem_server_lis_app mem_ser_lis_app;
                mem_ser_lis_app = (mem_server_lis_app)GetProcAddress(hinstLib, "memcached_server_list_append");
                if (NULL != mem_ser_lis_app)
                {
                    servers = mem_ser_lis_app(servers, "127.0.0.1", 11211, &rc);
                }

                memc_server_push memc_serv_push;
                memc_serv_push = (memc_server_push)GetProcAddress(hinstLib, "memcached_server_push");
                if (NULL != memc_serv_push)
                {
                    rc = memc_serv_push(memc, servers);
                }


                memcached_err err;
                err= (memcached_err)GetProcAddress(hinstLib, "memcached_strerror");
                if (rc == MEMCACHED_SUCCESS)
                    fprintf(stderr, "Added server successfully\n");
                else
                    fprintf(stderr, "Couldn't add server: %s\n", err(memc, rc));


                memcach_set memcachSet;
                memcachSet= (memcach_set)GetProcAddress(hinstLib, "memcached_set");
                rc = memcachSet(memc, key, strlen(key), value, strlen(value), (time_t)0, (uint32_t)0);
                if (rc == MEMCACHED_SUCCESS)
                    fprintf(stderr, "Key stored successfully\n");
                else
                    fprintf(stderr, "Couldn't store key: %s\n", err(memc, rc));

            }

            fFreeResult = FreeLibrary(hinstLib);
            return 0;
        }