using System;
using System.Collections.Generic;
using
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace 类
{
      public class student      //定义一个类
        {
            public string name;
            public float score1;
            public float score2;
            public float score3;
            public float sum(float s1, float s2,float s3)
            {this.score1=s1;
                this.score2=s2;
                this.score3=s3;
                return score1+score2+score3;
            }
              public float ave(float s1, float s2,float s3)
            {this.score1=s1;
                this.score2=s2;
                this.score3=s3;
                return (score1+score2+score3)/3;
            }
    public partial class Form1 : Form
    {
      
        public Form1()
        {
            InitializeComponent();
        }


        private void button1_Click(object sender, EventArgs e)
        {
            int i = 0;
            float n = 0, m = 0, s1, s2, s3;
            student[] stu = new student[44];
            Random rnd = new Random();
            stu[i].name = ((char)rnd.Next(65, 97)).ToString() + ((char)rnd.Next(65, 97)).ToString() + ((char)rnd.Next(65, 97)).ToString();//姓名
            s1 = (float)rnd.Next(1, 100);// 分数1
            s2 = (float)rnd.Next(1, 100);//分数2
            s3 = (float)rnd.Next(1, 100);//分数3
            n = stu[i].sum(s1, s2, s3);//总分
            m = stu[i].ave(s1, s2, s3);//平均分
            textBox1.Text = Convert.ToString(stu[i].name);
            textBox2.Text = Convert.ToString(s1);
            textBox3.Text = Convert.ToString(s2);
            textBox4.Text = Convert.ToString(s3);
            textBox5.Text = Convert.ToString(n);
            textBox6.Text = Convert.ToString(m);
        }

        }
    }
}
谁能给我正确的写法啊

你的student是个类,Form1也是一个类啊,应该是
public class student
{
}
public partial class Form1 : Form
{
}

而不是
public class student
{
    public partial class Form1 : Form
    {
    }
}
注意一下大括号

using System;
using System.Collections.Generic;
using using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace 类
{
    public class student      //定义一个类
    {
        public string name;
        public float score1;
        public float score2;
        public float score3;
        public float sum(float s1, float s2, float s3)
        {
            this.score1 = s1;
            this.score2 = s2;
            this.score3 = s3;
            return score1 + score2 + score3;
        }
        public float ave(float s1, float s2, float s3)
        {
            this.score1 = s1;
            this.score2 = s2;
            this.score3 = s3;
            return (score1 + score2 + score3) / 3;
        }
    }
    partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();
        }


        private void button1_Click(object sender, EventArgs e)
        {
            int i = 0;
            float n = 0, m = 0, s1, s2, s3;
            student[] stu = new student[44];
            Random rnd = new Random();
            stu[i] = new student();
            stu[i].name = ((char)rnd.Next(65, 97)).ToString()+ ((char)rnd.Next(65, 97)).ToString() + ((char)rnd.Next(65, 97)).ToString();//姓名
            s1 = (float)rnd.Next(1, 100);// 分数1
            s2 = (float)rnd.Next(1, 100);//分数2
            s3 = (float)rnd.Next(1, 100);//分数3
            n = stu[i].sum(s1, s2, s3);//总分
            m = stu[i].ave(s1, s2, s3);//平均分
            textBox1.Text = Convert.ToString(stu[i].name);
            textBox2.Text = Convert.ToString(s1);
            textBox3.Text = Convert.ToString(s2);
            textBox4.Text = Convert.ToString(s3);
            textBox5.Text = Convert.ToString(n);
            textBox6.Text = Convert.ToString(m);
        }
    }
}

[ 本帖最后由 lxb932979339 于 2013-5-1 16:29 编辑 ]

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