assigngrade.java

此源码为机械工业出版社出版的《Java语言程序设计》第三版所配套的书中所有源代码。

// AssignGrade.java: Assign grade
public class AssignGrade
{
  // Main method
  public static void main(String[] args)
  {
    int numOfStudents = 0; // The number of students
    int[] scores; // Array scores
    int best = 0; // The best score
    char grade; // The grade

    // Get number of students
    System.out.println("Please enter number of students");
    numOfStudents = MyInput.readInt();

    // Create array scores
    scores = new int[numOfStudents];

    // Read scores and find the best score
    System.out.println("Please enter " + numOfStudents + " scores");
    for (int i=0; i<scores.length; i++)
    {
      scores[i] = MyInput.readInt();
      if (scores[i] > best)
        best = scores[i];
    }

    // Assign and display grades
    for (int i=0; i<scores.length; i++)
    {
      if (scores[i] >= best - 10)
        grade = 'A';
      else if (scores[i] >= best - 20)
        grade = 'B';
      else if (scores[i] >= best - 30)
        grade = 'C';
      else if (scores[i] >= best - 40)
        grade = 'D';
      else
        grade = 'F';

      System.out.println("Student " + i + " score is " + scores[i] +
        " and grade is " + grade);
    }
  }
}