occi连接oracle数据库出现错误

Question

在vs2015中用occi连接oracle数据库时，程序能运行，但不久就会显示程序已停止运行
以下是我的代码：
#include

#include
using namespace std;
using namespace oracle::occi;

int main()
{
Environment *env;
Connection *conn;
Statement *stmt;
ResultSet *rt;
string username = "system";
string code = "123Tanruifeng";
string dataID = "orcl2";
env = Environment::createEnvironment();
conn = env->createConnection(username, code,dataID);
stmt = conn->createStatement();
stmt->executeUpdate("insert into department(dno,dname) values('d004','数学')");
rt = stmt->executeQuery("select * from department");
while (rt->next())
{
string fruit = rt->getString(1);
int qua = rt->getInt(2);
cout << qua << " " << fruit << endl;
}
conn->terminateStatement(stmt);
env->terminateConnection(conn);
Environment::terminateEnvironment(env);

}

出现的错误

请各位大神帮帮忙！！！

Answer 1

1. 请格式化代码，不然看着很乱；
2. 请在关键的地方加入 try catch语句块；
3. 请在必要的地方加是Log打印，例如连接前、连接后、查询前、查询后，这样就能直接定位哪一步报的错；