public?class?demo1?{
????public?static?void?main(String[]?args)?{
????????int?clanum=4;
????????int?stunum=3;
????????for(int?c=1;c<=clanum;c++){
????????????double?sum=0;
????????????System.out.println("***輸入第"+c+"個班級的學生分數***");
????????????for(int?s=1;s<=stunum;s++){
????????????????System.out.print("輸入第"+s+"個的學生分數：");
????????????????double?score=new?Scanner(System.in).nextDouble();
????????????????sum=sum+score;
????????????}
????????????double?avg=sum/stunum;
????????????System.out.println("平均分："+avg);
????????}
????}
}