c语言使用freetds连接ms sql server

首先编译安装freetds这部分就省略了，直接上代码：

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <iostream>
 #include <sybfront.h>
 #include <sybdb.h>

 bool ConnectDataBase(DBPROCESS **dbprocess)
 {
     bool ret = false;
     char szUsername[32] = "user";
     char szPassword[32] = "123";
     char szDBName[32] = "jyxtec";
     char szServer[32] = "2.23.3.63:1433";

     dbinit();
     LOGINREC *loginrec = dblogin();
     DBSETLUSER(loginrec, szUsername);
     DBSETLPWD(loginrec, szPassword);
     *dbprocess = dbopen(loginrec, szServer);
     if(*dbprocess == FAIL){
         printf("ASB>> Conect MS SQL SERVER fail \n");
         return false;
     }else{
         printf("ASB>> ConnectEMS conect MS SQL SERVER success\n");
         ret = true;
     }
     if(dbuse(*dbprocess, szDBName) == FAIL){
         printf("ASB>> Open database name fail\n");
         ret = false;
     }else{
         printf("ASB>> Open database name success\n");
         ret = true;
     }

     return ret;
 }

     int
 main( int argc, char **argv )
 {
     DBPROCESS *dbprocess;
     if (!ConnectDataBase(&dbprocess))
         return 1;

     dbcmd(dbprocess, "SELECT card_No FROM D_blackList WHERE version='36'");
     if(dbsqlexec(dbprocess) == FAIL){
         printf("ASB>> Query Alarms table error\n");
         return 1;
     }

     DBINT result_code;
     char card_no[64];
     int rows = 0;
     while ((result_code = dbresults(dbprocess)) != NO_MORE_RESULTS){
         if (result_code == SUCCEED){
             memset(card_no, 0, sizeof(card_no));
             dbbind(dbprocess, 1, CHARBIND, (DBINT)0, (BYTE*)card_no);

             while (dbnextrow(dbprocess) != NO_MORE_ROWS){
                 printf("ASB>> card_no=%s\n", card_no);
             }
         }
     }

     dbclose(dbprocess);
     return 0;
 }

比如我运行的输出：
ASB>>      ConnectEMS conect MS SQL SERVER success
ASB>>      Open database name success
ASB>>             card_no=10000005

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