[英]how can i number each user input? C#
剛開始學習C#,我的問題是如何按順序記錄用戶輸入: score 1:
score 1: 98
score 2: 76
score 3: 65
score 4: 78
score 5: 56
在我的代碼中我可以輸入數字,但似乎無法設置順序我如何實現這個目標我的輸入:
98
76
65
78
56
碼:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace MyGrade03
{
public class Program
{
private int total; // sum of grades
private int gradeCounter; //number of grades entered
private int aCount; // Count of A grades
private int bCount; // Count of B grades
private int cCount; // Count of C grades
private int dCount; // Count of D grades
private int fCount; // Count of F grades
private string v;
public string CourseName { get; set; }
public Program(string name)
{
CourseName = name;
}
public void DisplayMessage()
{
Console.WriteLine("Welcome to the grade book for \n{0}!\n",
CourseName);
}
public void InputGrade()
{
int grade;
string input;
Console.WriteLine("{0}\n{1}",
"Enter the integer grades in the range 0-100",
"Type <Ctrl> z and press Enter to terminate input:");
input = Console.ReadLine(); //read user input
while (input != null)
{
grade = Convert.ToInt32(input); //read grade off user input
total += grade;// add grade to total
gradeCounter++; // increment number of grades
IncrementLetterGradeCounter(grade);
input = Console.ReadLine();
}
}
private void IncrementLetterGradeCounter(int grade)
{
switch (grade / 10)
{
case 9: //grade was in the 90s
case 10:
++aCount;
break;
case 8:
++bCount;
break;
case7:
++cCount;
case6:
++dCount;
break;
default:
++fCount;
break;
}
}
public void DisplayGradeReport()
{
Console.WriteLine("\nGrade Report");
if (gradeCounter != 0)
{
double average = (double)total / gradeCounter;
Console.WriteLine("Total of the {0} grades entered is {1}",
gradeCounter, total);
Console.WriteLine("class average is {0:F}", average);
Console.WriteLine("{0}A: {1}\nB: {2}\nC: {3}\nD: {4}\nF: {5} ",
"Number of students who received each grade: \n",
aCount,
bCount,
cCount,
dCount,
fCount);
}
else
Console.WriteLine("No grades were entered");
}
static void Main(string[] args)
{
Program mygradebook = new Program(
"CS101 introduction to C3 programming");
mygradebook.DisplayMessage();
mygradebook.InputGrade();
mygradebook.DisplayGradeReport();
}
}
}
聲明一個變量來計算像private static int counter = 0;
這樣的輸入private static int counter = 0;
在InputGrade
方法中,如下所示
Console.WriteLine("{0}\n{1}",
"Enter the integer grades in the range 0-100",
"Type <Ctrl> z and press Enter to terminate input:");
counter++;
System.Console.Write("score " + counter + ":");
input = Console.ReadLine(); //read user input
和內部while (input != null)
如下所示
IncrementLetterGradeCounter(grade);
counter++;
System.Console.Write("score " + counter + ":");
input = Console.ReadLine();
這是完整的代碼
public class Program
{
private int total; // sum of grades
private int gradeCounter; //number of grades entered
private int aCount; // Count of A grades
private int bCount; // Count of B grades
private int cCount; // Count of C grades
private int dCount; // Count of D grades
private int fCount; // Count of F grades
private string v;
private static int counter = 0;
public string CourseName { get; set; }
public Program(string name)
{
CourseName = name;
}
public void DisplayMessage()
{
Console.WriteLine("Welcome to the grade book for \n{0}!\n",
CourseName);
}
public void InputGrade()
{
int grade;
string input;
Console.WriteLine("{0}\n{1}",
"Enter the integer grades in the range 0-100",
"Type <Ctrl> z and press Enter to terminate input:");
counter++;
System.Console.Write("score " + counter + ":");
input = Console.ReadLine(); //read user input
while (input != null)
{
grade = Convert.ToInt32(input); //read grade off user input
total += grade;// add grade to total
gradeCounter++; // increment number of grades
IncrementLetterGradeCounter(grade);
counter++;
System.Console.Write("score " + counter + ":");
input = Console.ReadLine();
}
}
private void IncrementLetterGradeCounter(int grade)
{
switch (grade / 10)
{
case 9: //grade was in the 90s
case 10:
++aCount;
break;
case 8:
++bCount;
break;
case7:
++cCount;
case6:
++dCount;
break;
default:
++fCount;
break;
}
}
public void DisplayGradeReport()
{
Console.WriteLine("\nGrade Report");
if (gradeCounter != 0)
{
double average = (double)total / gradeCounter;
Console.WriteLine("Total of the {0} grades entered is {1}",
gradeCounter, total);
Console.WriteLine("class average is {0:F}", average);
Console.WriteLine("{0}A: {1}\nB: {2}\nC: {3}\nD: {4}\nF: {5} ",
"Number of students who received each grade: \n",
aCount,
bCount,
cCount,
dCount,
fCount);
}
else
Console.WriteLine("No grades were entered");
}
static void Main(string[] args)
{
Program mygradebook = new Program(
"CS101 introduction to C3 programming");
mygradebook.DisplayMessage();
mygradebook.InputGrade();
mygradebook.DisplayGradeReport();
Console.ReadKey();
}
}
有許多數據結構可以讓您按順序存儲數據。 我個人推薦一個List<int>
。
您可以像下面這樣添加內容:
var list = new List<int>();
list.Add(37);
list.Add(95);
您可以使用迭代器( foreach(var score in list){...}
)讀取它,或者獲取單個數字( var firstScore = list[0]
)。 該文檔將告訴您有關List<T>
。
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