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C/C++ code:
#include <windows.h>
#include <sql.h>
#include <sqlext.h>
#include <string.h>
#include <stdio.h>
#include <sqltypes.h>

#define LNAME_LEN 41
#define FNAME_LEN 21
#define MAX 200
const char* dbname="library";


int main()
{
SQLHENV henv;
SQLHDBC hdbc;
SQLHSTMT hstmt;
RETCODE retcode;
RETCODE ret;

SQLAllocEnv(&henv); //·ÖÅä»·¾³¾ä±ú
SQLAllocConnect(henv,&hdbc); //·ÖÅäÁ¬½Ó¾ä±ú
ret=SQLConnect(hdbc,( SQLWCHAR *) dbname,SQL_NTS, //Á¬½ÓÊý¾ÝÔ´
TEXT("root"),SQL_NTS,TEXT("7585524"),SQL_NTS);
if(ret==SQL_SUCCESS)
printf("link successful\n");
else
{
printf("failure\n");
return 0;
}

SQLFreeStmt(hstmt,SQL_DROP);
SQLDisconnect(hdbc);
SQLFreeConnect(hdbc);
SQLFreeEnv(henv);
return 0;
}


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