6月15日のC#勉強会の課題実装例

linq.cs

using System;
using System.Linq;
using CampusSquare;


class Example2 {
	public static void Main() {
		var grades = new CampusSquare.DummyCampusSquare("record.html").GetGrades();

		Console.WriteLine("GPA: " + (
			(double)grades.Select(x => x.GradeNum * x.CreditNum).Sum()
			/
			grades.Select(x => x.CreditNum).Sum()
		));

		Console.WriteLine("\ngood: ");
		foreach(var grade in grades.Where(x => x.GradeNum == grades.Select(y => y.GradeNum).Max())){
			Console.WriteLine(" " + grade.Grade + ": " + grade.Name);
		}

		Console.WriteLine("\nbad: ");
		foreach(var grade in grades.Where(x => x.GradeNum == grades.Select(y => y.GradeNum).Min())){
			Console.WriteLine(" " + grade.Grade + ": " + grade.Name);
		}
	}
}

simple.cs

using System;
using CampusSquare;

class Example1
{
    static void Main(string[] args)
    {
        var grades = new CampusSquare.DummyCampusSquare("record.html").GetGrades();

        double creditSum = 0, gradeSum = 0;

        foreach (IGrade grade in grades)
        {
            creditSum += grade.CreditNum;
            gradeSum += grade.CreditNum * grade.GradeNum;
        }

        double gpa = gradeSum / creditSum;

        Console.WriteLine("GPA:\t{0}", gpa);

        int max = 0, min = 4;

        foreach (IGrade grade in grades)
        {
            max = Math.Max(max, grade.GradeNum);
            min = Math.Min(min, grade.GradeNum);
        }

        Console.WriteLine("\ngood:");

        foreach (IGrade grade in grades)
        {
            if (grade.GradeNum == max)
            {
                Console.WriteLine("\t{0}:{1}", grade.Grade, grade.Name);
            }
        }

        Console.WriteLine("\nbad:");

        foreach (IGrade grade in grades)
        {
            if (grade.GradeNum == min)
            {
                Console.WriteLine("\t{0}:{1}", grade.Grade, grade.Name);
            }
        }
    }
}