c# 定义一个描述学生基本情况的类，数据成员包括姓名，学号，C++，英语和数学成绩，成员函数包括输出数据

using System;
using System.Collections.Generic;
using System.Text;

namespace stuConsole
{
//定义学生类
class student
{
//字段定义
private string name; //姓名
private string no; //学号
private double engScore; //英语成绩
private double cScore; //C++成绩
private double mathScore; //数学成绩

//定义属性,通过属性访问、修改相应字段
public string Name
{
set{name = value;}
get{return name;}
}
public string No
{
set{no = value;}
get{return no;}
}
public double EngScore
{
set{engScore = value;}
get{return engScore;}
}
public double CScore
{
set{cScore = value;}
get{return cScore;}
}
public double MathScore
{
set { mathScore = value; }
get { return mathScore; }
}

//输入相应的数据
public void inputText()
{
Console.WriteLine("请输入姓名：");
Name = Console.ReadLine();
Console.WriteLine("请输入学号：");
No = Console.ReadLine();
Console.WriteLine("请输入英语成绩：");
EngScore = double.Parse(Console.ReadLine());
Console.WriteLine("请输入C++成绩：");
CScore = double.Parse(Console.ReadLine());
Console.WriteLine("请输入数学成绩：");
MathScore = double.Parse(Console.ReadLine());
}
//输出相应的数据
public void outputText()
{
Console.WriteLine("姓名为：{0}", Name);
Console.WriteLine("学号为：{0}",No);
Console.WriteLine("平均成绩为：{0}", avgScoreText());
Console.WriteLine("总成绩为：{0}", allScoreText());
}
//平均成绩
private double avgScoreText()
{

return (EngScore + CScore + MathScore) / 3;

}
//总成绩
private double allScoreText()
{
return EngScore + CScore + MathScore;
}
}
class Program
{
static void Main(string[] args)
{
try
{
student t = new student();
t.inputText();
t.outputText();
Console.ReadLine();
}
catch(Exception ex)
{
Console.WriteLine(ex.Message.ToString());
}
}
}

}

C#控制台的程序：
using System;
using System.Collections.Generic;
using System.Text;

namespace 成绩
{
class Program
{
class student
{
private string number;
private string name;
private int cscore;
private int english;
private int maths;

public void gettext( ) //输入函数
{
Console.WriteLine("请输入学生的学号、姓名、c++成绩、英语成绩和数学成绩：");
number = Console.ReadLine();
name = Console.ReadLine();
cscore = int.Parse(Console.ReadLine());
english = int.Parse(Console.ReadLine());
maths = int.Parse(Console.ReadLine());
}

public void outputtext()//输出成绩
{
Console.WriteLine("学生的学号、姓名、三科总成绩和平均成绩是:");
float average = (cscore + english + maths) / 3;
Console.WriteLine("学生学号:{0},学生姓名:{1},总成绩:{2},平均成绩:{3}", number, name, (cscore + english + maths), average);
}

}

static void Main(string[] args)
{
try
{
student st = new student();
st.gettext();
st.outputtext();
}
catch (Exception ex) { Console.WriteLine(ex.Message.ToString()); }
}
}
}

不好意思，我搞错了，我以为是把数据放到数据库里面的，楼下的是对的