如何从Java中的双精度数组创建char数组？

Question

我有一个包含表示中期成绩的值的双精度数组，我需要创建一个具有相同值的char数组，但需要它来显示字母成绩。例如，我需要从{89.6，73.9，96.9}转到{B，C，A}。到目前为止，这是我的代码：

  int numStudents = 60;
      int studNum = 1;
      double[] midtermGrades = new double[numStudents];
      Scanner grades = new Scanner(System.in);
   
      System.out.println("Here are the scores for the most recent test taken by your class:");
      
      
      for (int i = 0; i < midtermGrades.length; i++) {
         midtermGrades[i] = (60 + (double)(Math.random() * 40));
         System.out.printf("Student " + studNum++ + " : " + "%.1f\n", midtermGrades[i]);
      }
      
      double total = 0;
      for (int i = 0; i < midtermGrades.length; i++) {
         total += midtermGrades[i];
      }
      
      double studAvg = (total / midtermGrades.length);
      System.out.printf("The average grade for your class was " + "%.1f\n", studAvg);
       
      int aboveAvg = 0;
                
      for (int i = 0; i < midtermGrades.length; i++) {
         if (midtermGrades[i] > studAvg) {
             aboveAvg++;
         }
      }
      System.out.println("There are " + aboveAvg + " students in your class who scored above the average.\n");
      
     
      
      char[] letterGrades = new char[midtermGrades.length];
      for (int i = 0; i < midtermGrades.length; i++) {
         letterGrades[i] = (char)midtermGrades[i];
               
   }
}

Answer 1

您可以尝试使用其他字符数组并指定评分标准

char midtermgrades2 = new char[numStudents] ;
for(i=0;i<midtermgrades.length;i++)
{If(midtermsgrades[i]<100 && midtermsgrades[i]>80) 
Midtermgrades2[i]='A';
else 
//specify more conditions like this
}