獲取2維數組的用戶字符輸入

Question

我需要找到一種方法來獲取用戶t/f答案到數組中，以便可以根據密鑰對它們進行檢查。我現在正在得到一個永無止境的循環。我不知道我該如何避免這種情況。

public class TrueFalse { 

    public static void main(String[] args) { 

     DecimalFormat mine = new DecimalFormat("##0.0"); 
     Scanner input = new Scanner(System.in); 

     //Creates an array to store student answers 
     char [][] studentAnswers = new char[8][11]; 
     System.out.println(" please enter T/F"); 
     for (int h = 0; h < studentAnswers[h].length; h++){ 
      for (int k = 0; k < studentAnswers.length; k++){ 
       studentAnswers[k][h] = input.next().charAt(0); 
      } 
     } 

     //Answer Key that will be compared to student answers 
     char [] keys = {'T', 'T', 'T', 'T', 'T', 'T', 'T', 'T', 'T', 'F', 'F'}; 


     //Grading the user answers 
     for (int i = 0; i < studentAnswers.length; i++){ 
      //Grade for one student 
      int score = 0; 
      for (int j = 0; j < studentAnswers[i].length; j++){ 
       if(studentAnswers[i][j] == keys[j]) 
       ++score; 
      } 

      double average = (double)score/studentAnswers.length * 100; 

      System.out.println("Student number " + i + " score was: " + mine.format(average)); 

     } 

    } 
} 

Answer 1

您可以嘗試使用下面的代碼來打印你的場均數據：

for (int i=0; i < studentAnswers[i].length; ++i) { 
    int score = 0; 
    for (int j=0; j < studentAnswers.length; ++j) { 
     if (studentAnswers[j][i] == keys[j]) { 
      ++score; 
     } 
    } 

    DecimalFormat df = new DecimalFormat(".##"); 
    double average = (double)score/studentAnswers.length; 
    System.out.println("Student number " + i + " score was: " + df.format(average)); 
}