《面向对象程序设计》试题.doc

一、程序修改(20分)说明:描述程序中的语法错误原因并修改,每小题4分,错误原因和改正错误各2分。。publicbooleanisPrime(intnum){booleanresult=false;for(inti=2;i<num;i++){if(num%i==0)break;}if(i>=num){result=true;}returnresult;}。interfaceReadable{voidread();}classReaderimplementsReadable{voidread(){("ICanreadit.");}}。lassError03{publicstaticdoublemax(inta,doubleb){returna>b?a:b;}publicstaticdoublemax(doublea,intb){returna>b?a:b;}publicstaticvoidmain(String[]args){doublec=max(10,100);}}。classParent{publicfinalvoidoutput(){("Parent");}}classChildextendsParent{publicvoidoutput(){("Child");}}。lassError05{publicdoublesum(double[]array){doubleresult=0;for(doublevalue:array){result+=value;}returnresult;}publicstaticvoidmain(String[]args){double[]arr={,,,,};(sum(arr));}}得分二、程序填空(20分)说明:填充程序中的空白,使程序能够正确运行,每空2分。,并分别计算每个班的总成绩。;lassScore{//inputScore方法用于输入一个班的所有成绩,参数num是班级的学生人数publicstaticdouble[]inputScore(intnum){double[]array=newdouble[num];Scannerscanner=newScanner();for(inti=0;i<(1);i++){array[i]=();}returnarray;}publicstaticdoublesumScore(double[]array){doubleresult=0;for(inti=0;i<;i++){result+=array[i];}returnresult;}publicstaticvoidmain(String[]args){double[][]scores;intnumOfClass,numOfStudent;Scannerscanner=newScanner();("一共有几个班?");numOfClass=();scores=(2);for(inti=0;i<numOfClass;i++){("第"+(i+1)+"班有几人?");numOfStudent=();scores[i]=inputScore((3));}for(inti=0;i<numOfClass;i++){("第"+(i+1)+"班的总分:");(sumScore((4)));}}}。//类1,{privatedoubleradius;//ircle(){//无参构造方法(5)//}ircle(doubleradius){(6)//把参数radius赋给数据域radius}publicdoublegetArea(){return(7);//求圆的面积,