Question

有人可以帮我完成这项功课吗？

我尝试了一些东西，但我不确定我的解决方案是否涵盖了所有任务。我必须编写一个Java程序，它使用第5学期的标记初始化一个二维数组（如你所知，只有5个标记）n个学生（用户应该输入学生数）。

程序应该输出结果：

第五学期所有学生的平均成绩;
平均成绩最高的学生人数;
平均成绩最低的学生人数;
平均成绩高于所有学生平均成绩的学生人数;
平均成绩低于所有学生平均成绩的学生人数;

该计划应进行如下数据验证：学生的分数应在2到6之间，学生人数不应超过30分。

到目前为止，这是我的解决方案：

package ocenki;


public static void main(String[] args) {

 Scanner scan = new Scanner (System.in ) ;
 System.out.println ("Enter notes here:") ;

 double [] marks= new double [5] ;

 for ( int i=0; i<=4; i++)   
 {
     System.out.println ("Please, input mark for " + i +(" subject")) ; 

     marks[i] = scan. nextDouble () ; 

     while (marks[i]<2 || marks[i]>6)
     {
         System.out.println ("Please, input marks between 2 and 6:") ;
         marks[i] = scan.nextDouble () ;
     }
 }

 double sum=0; 
 double min=marks[0];
 double max=marks[0];

 for ( int i=0; i<=4; i++)
 {
     sum = sum+marks[i] ; 
     if(marks[i]>max)
     {
         max=marks[i];
     }
     if(marks[i]<min)
     {
         min=marks[i];
     }       
 }
 System.out.println("The average is " + sum/5 + ", the minimum is " + min + " and the maximum is " + max); 
}

Answer 1

请找到Q-4和Q-5的解决方案

<强>解决方案

    double avg= sum/5;
 for ( int i=0; i<=4; i++)
 {
     if(marks[i]>avg)
     {
         moreAvg++;
     }
     if(marks[i]<avg)
     {
         lessAvg++;
     }   
 }

完整代码 -

public static void main(String[] args) {

 Scanner scan = new Scanner (System.in ) ;
 System.out.println ("Enter notes here:") ;

 double [] marks= new double [5] ;

 for ( int i=0; i<=4; i++)   
 {
     System.out.println ("Please, input mark for " + (i+1) +(" subject")) ; 

     marks[i] = scan. nextDouble () ; 

     while (marks[i]<2 || marks[i]>6)
     {
         System.out.println ("Please, input marks between 2 and 6:") ;
         marks[i] = scan.nextDouble () ;
     }
 }

 double sum=0; 
 double min=marks[0];
 double max=marks[0];
 int lessAvg=1,moreAvg=0;
 for ( int i=0; i<=4; i++)
 {
     sum = sum+marks[i] ; 
     if(marks[i]>max)
     {
         max=marks[i];
     }
     if(marks[i]<min)
     {
         min=marks[i];
     }       
 }

 double avg= sum/5;
 for ( int i=0; i<=4; i++)
 {
     if(marks[i]>avg)
     {
         moreAvg++;
     }
     if(marks[i]<avg)
     {
         lessAvg++;
     }   
 }

 System.out.println("The average is " +avg + ", the minimum is " + min + " and the maximum is " + max);
 System.out.println("4.The number of students with an average grade greater than the average grade of all students"+moreAvg);
 System.out.println("5.The number of students with an average grade less than the average grade of all students"+lessAvg);
}

Java 2维数组和平均值

1 个答案: