Question

  for(int i = 0; i < 2; i++)
  {
     System.out.print("How many grades does the student have for semester " + (i+1) + ": "); 
     gradeAmt = keyboard.nextInt();

     while(gradeAmt <= 1)
      {
      System.out.println("You need to enter at least two grades.");
      System.out.print("Enter again: ");
      gradeAmt = keyboard.nextInt();
      }
     int[] gradeArray = new int[gradeAmt];

     for(int k = 0; k < gradeArray.length; k++)
        {   
        System.out.print("Enter test " + (k+1) + ": ");
         gradeArray[k] = keyboard.nextInt();
        }
  }

看看这段代码，我想将两个季度的测试值传递给一个方法，转换成字母等级。例如，如果第一学期的测试值是90和80，而第二学期的测试值是90和60，我希望该方法返回2 A，1 B和1 D是等级那一年。我如何将两个学期的输入传递给方法？

可以在http://pastebin.com/ER2kEwA5查看完整代码我创建该方法的尝试是在第56行（P.S我知道它很可怕）

Answer 1

要将数字转换为字母，您可以使用以下内容：

char[] gradeLetters = {'A','B','C','D','E','F'};
int[] count = {0,0,0,0,0,0};
 for(int k = 0; k < gradeArray.length; k++)
 {   
      int gradeIndex = (100 - gradeArray[k])/10;
      count[gradeIndex]++;
 }

打印出来的信只需使用：

 for(int k = 0; k < count.length; k++){
      if(count[k] == 1)      
        System.out.printline("1 "+ gradeLetters[k]);
      else if(count[k] > 1)
        System.out.printline(count[k]+" "+gradeLetters[k]+"'s");
  }

Answer 2

使用数组提交（并返回）所有值。

char[] getGrades(int[] score) {
    char[] grades = {'A', 'B', 'C', 'D', 'E', 'F'};
    char[] retVal = new char[score.length];
    for (int i = 0; i < score.length; i++) {
        retVal[i] = grades[Math.min(5,(9 - (score[i] / 10)))];
    }
    return retVal;
}

将数组的值传递给方法

2 个答案: