class?Score ????????def?initialize(id=0,subject,socre,student_name,explain) ????????????????@id?=id ????????????????@subject?=subject ????????????????@score?=score ????????????????@student_name?=student_name ????????????????@explain=explain ????????end ????????attr_accessor?:id,:subject,:score,:student_name,:explain end require?"mysql" def?createSQL(score) ????????"insert?into?scores(subject,score,student_name,`explain`)"+ ????????"values('#{score.subject}',#{score.score},'#{score.student_name}','#{score.explain}')" end def?saveScore(dbh,score) ????????sql=createSQL(score) ????????dbh.query(sql) ????????if(dbh.affected_rows==1) ????????????????puts?"學(xué)生?#{score.student_name}?的成績(jī)已經(jīng)被放入數(shù)據(jù)庫(kù)" ????????end end peter=Score.new("數(shù)學(xué)",83,"Peter","")#提示的位置 libei=Score.new("數(shù)學(xué)",100,"李貝","") liubuyi=Score.new("數(shù)學(xué)",58,"劉不一","因?yàn)檫t到，題沒(méi)做完") begin ????????dbh=Mysql.real_connect("localhost","root","root","db_student") ????????saveScore(dbh,peter) ????????#saveScore(dbh,libei) ????????#saveScore(dbh,liubuyi) ????????# ????????#sql="update?scores?set?score?=#{86}?where?student_name='#{"peter"}'" ????????#dbh.query(sql) ????????#if(dbh.affected_rows==1) ????????#???????puts?"學(xué)生#{"李貝"}的成績(jī)刪除成功" ????????#end rescue??Mysql::Error=>e ????????puts?"Error?Number:?#{e.errno}" ????????puts?"Error?Number:?#{e.errno}" ????????puts?"Error?Message:?#{e.error}" ????????puts?"Error?State:?#{e.sqlstate}"?if?e.respond_to?("sqlstate") ensure ????????dbh.close end這是運(yùn)行ruby文件后的提示求解如何修改