MFC与数据库间的有关问题

MFC与数据库间的问题
CString temp = ("insert into course (cnumber,cname,ctime,ctype,ccredit) values('%s','%s','%s','%s','%s')",m_CNUMBER,m_CNAME,m_CTIME,m_CTYPE,m_CCREDIT);

strSQL.Format(temp);
m_database.ExecuteSQL(strSQL);

可是执行到第二句的时候 temp取得并不是我想的SQL语句而是m_CCREDIT的值

怎么办

------解决方案--------------------
strSQL.Format("insert into course (cnumber,cname,ctime,ctype,ccredit) values('%s','%s','%s','%s','%s')",m_CNUMBER,m_CNAME,m_CTIME,m_CTYPE,m_CCREDIT);