如何计算学生的平均绩点（GPA）

Question

我想为一所大学 class 编写一种方法，该方法将学科作为参数，returns 该学科学生的平均绩点 (GPA)，但我没有不知道怎么做，这是方法的签名：

public double AverageOfDiscipline(discipline D)
    {
        double sum = 0;
        for (int i = 0; i < students.Length; i++)
        {
            //???
        }
        return //????
    }

这是我的项目：

public enum discipline { Computer, Civil, Mechanical, Electrical}
public enum educationType { Undergraduate, Postgraduate}
class Student
{
    public string nameAndLastName;
    public double GPA;
    public discipline discipline;
    public educationType education;
    public Student(string nameAndLastName, double GPA, discipline discipline, educationType education)
    {
        this.nameAndLastName = nameAndLastName;
        this. GPA = GPA;
        this.discipline = discipline;
        this.education = education;
    }
    public string ToString()
    {
        return nameAndLastName + ": "+ education + ", "+ discipline+ "; "+"GPA: "+ GPA ;
    }
}

class University
{
    public string uniName;
    public Student[] students;
    public double AverageOfDiscipline(discipline D)
    {
        double sum = 0;
        for (int i = 0; i < students.Length; i++)
        {
            //???
        }
        return //????
    }
}

感谢您的帮助。

Answer 1

对于大学 class 你需要遍历学生数组，检查他们是否在追求指定的规则，求和然后计算平均值如下

  public double AverageOfDiscipline(discipline D)
        {
            double sum = 0;
            int totalStudentsForDispline = 0;
            for (int i = 0; i < students.Length; i++)
            {
                if (students[i].discipline == D)
                {
                    sum += students[i].GPA;
                    totalStudentsForDispline += 1;
                }
            }

            return sum > 0 ? sum / totalStudentsForDispline : 0;
        }

如何计算学生的平均绩点（GPA）

How to calculate the grade point average(GPA) of students

c#