Question

我想知道如何在for循环的if语句中打印项目。当我打印出数组时，一切都很好，除了if语句中的项目（即gradeValue）。它只是打印最后一个项目，并将该项目复制到前几行。

    for(int i = 0; i < numberofcourses; i++)
    {
        scanner.nextLine();
        System.out.println("Please enter your #"+(i+1)+" class name: ");
        ClassName[i] = scanner.nextLine();
        System.out.println("Please enter your #"+(i+1)+" class description: ");
        Description[i] = scanner.nextLine();
        System.out.println("Please enter your #"+(i+1)+" class units: ");
        Units [i] = scanner.nextInt();
        scanner.nextLine();
        System.out.println("Please enter your #"+(i+1)+" class grade: ");
        grade[i] = scanner.nextLine();

        if (grade[i].equals ("A"))
            gradeValue= 4.00;
          else if (grade[i].equals("A-"))
            gradeValue= 3.67;
          else if (grade[i].equals("B+"))
            gradeValue = 3.33;
          else if (grade[i].equals("B"))
            gradeValue = 3.00;
          else if (grade[i].equals ("B-"))
            gradeValue = 2.67;
          else if (grade[i].equals("C+"))
            gradeValue = 2.33;
          else if (grade[i].equals("C"))
            gradeValue = 2.00;
          else if (grade[i].equals ("D+"))
          gradeValue = 1.33;
          else if (grade[i].equals ("D"))
            gradeValue = 1.00;
          else if (grade[i].equals ("F"))
            gradeValue = 0;
          else if (grade[i].equals ("FX"))
            gradeValue = 0;
          else
            System.out.println ("Invalid Grade");
            finalgrade = gradeValue * Units[i];
    }

以下是输出示例。如您所见，GradePoint保持在3.33，即我输入的最后一项B +。我之前输入的没有A和B-的迹象。：（

Please enter the term of your grade calculation (for example, Fall 2015): 
Fall 2019
Please enter the number of courses that you are enrolled in Fall 2019: 
3
Please enter your #1 class name: 
FIN301
Please enter your #1 class description: 
Personal Finance
Please enter your #1 class units: 
3
Please enter your #1 class grade: 
A

Please enter your #2 class name: 
BUS314
Please enter your #2 class description: 
Business Finance
Please enter your #2 class units: 
3
Please enter your #2 class grade: 
B-

Please enter your #3 class name: 
BUS313
Please enter your #3 class description: 
Economics Finance
Please enter your #3 class units: 
3
Please enter your #3 class grade: 
B+
Class Grades - Fall 2019 Term
Office Grades
             Class               | Description               |  Units               |  Grade               | Gradepoint
------------------------------------------------------------------------------------------------------------------
            FIN301               | Personal Finance               |      3               |      A               |   3.33
            BUS314               | Business Finance               |      3               |     B-               |   3.33
            BUS313               | Economics Finance               |      3               |     B+               |   3.33

Answer 1

您的主要问题是，在每次迭代中，您都计算finalgrade，但是没有像其他变量一样将其存储在数组中，因此在下一次迭代中它会被覆盖。
因此，您得到的最后一个值为finalgrade。
将finalgrade更改为数组并像这样使用它：

finalgrade[i] = gradeValue * Units[i];

如何在for循环（数组）中打印if语句

1 个答案: