问-l选项和PostgreSQL的g++问题

EN

#include <iostream>
#include <stdio.h>
#include <D:\Program Files\PostgreSQL\8.4\include\libpq-fe.h>
#include <string>


using namespace std;

int main()
{
  PGconn          *conn;
  PGresult        *res;
  int             rec_count;
  int             row;
  int             col;


  cout << "ble ble: " << 8 << endl;

  conn = PQconnectdb("dbname=db_pm host=localhost user=postgres password=postgres");

         if (PQstatus(conn) == CONNECTION_BAD) {
                 puts("We were unable to connect to the database");
                 exit(0);
         }
}