Question

我不确定如何显示用户输入的每个课程。因为它只显示输入的最后一个课程。我没想到什么？

while (quit != "0")
{
    //get user data
    Console.WriteLine("Enter course # {0}:", counter);
    course = Console.ReadLine();

    Console.WriteLine("Enter grade value of 1-4 # {0}:", counter);
    grade = Convert.ToInt32 (Console.ReadLine());

    Console.WriteLine("Enter credit hours from 1-3 # {0}:",counter);
    creditHours = Convert.ToInt32 (Console.ReadLine());


    //calculate grade * creditHours and store in gradePoints
    gradePoints = grade * creditHours;

    //running total of credit hours and grades
    totalGradePoints += gradePoints;
    totalCreditHours += creditHours;

    Console.WriteLine("Press '0' to quit or any key to continue.");
    quit = Console.ReadLine();
    counter++;// adds one to counter

}//end while

// calculate gpa
double GPA = totalGradePoints / totalCreditHours;

//display course(s) credit hours and gpa
Console.WriteLine("Course(s): {0}", course);
Console.WriteLine("Credit hours: {0}",totalCreditHours);
Console.WriteLine("GPA: {0:n2}",GPA);

Answer 1

你需要移动

 Console.WriteLine("Course(s): {0}", course);

在while循环内部。您只在循环结束后显示它。所以这就是你看最后一门课程的原因。

如果您不想立即显示它们，请将课程存储到一个集合中，并在while循环后遍历该集合并显示它们：

var courses = new List<string>();
while(...)
{
     ...
     course = Console.ReadLine();
     courses.Add(course);
     ...
}

foreach(var c in courses)
     Console.WriteLine(c);

Answer 2

您在while循环中设置变量，因此循环的每次迭代都会覆盖相同的变量。

相反，请尝试使用List<T>对象或数组，这两个对象或数组都可以包含多个值，并考虑为您的数据创建class，因为它们全部关联：

class CourseData
{
    public string Course { get; set; }
    public int Grade { get; set; }
    public nt CreditHours { get; set; }
    public int GradePoints { get { reutrn Grade * CreditHours; } }
}

如何显示while循环中输入的每个课程？ C＃

2 个答案: