第一阶段结对作业验收小学生四则运算：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace 小学算数
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private int ti_shu, result, f1, f2;
private void chu_ti()
{
Random suiji = new Random();
int a = suiji.Next(0, 10);
int b = suiji.Next(1, 10);
int c = suiji.Next(0, 10);
int d = suiji.Next(1, 10);
int p = 4;
//int p = suiji.Next(0, 7);
if (p == 0)//出加法题
{
label1.Text = a.ToString() + "+" + b.ToString() + "=";
result = a + b;
f1 = result;
f2 = 1;
}
if (p == 1) //出减法题
{
label1.Text = a.ToString() + "-" + b.ToString() + "+" + c.ToString() + "-" + d.ToString();
result = a - b;
f1 = result;
f2 = 1;
}
ti_shu = ti_shu + 1;
textBox1.Text = "";
if (p == 2) //出乘法题
{
label1.Text = a.ToString() + "*" + b.ToString() + "=";
result = a * b;
f1 = result;
f2 = 1;
}
if (p == 3) //出除法题
{
label1.Text = a.ToString() + "/" + b.ToString() + "=";
f1 = a;
f2 = b;
int g;
g = Gcd(f1, f2);
if (g>1)
{
f1 = f1 / g;
f2 = f2 / g;
}
if (f2==1)
{
result = f1;
}
}
if (p == 4) //出分数加法题
{
if (a > b)
{
int t = a; a = b; b = t;
}
if (c > d)
{
int t = c; c = d; d = t;
}
label1.Text = a.ToString() + "/" + b.ToString() + "+" + c.ToString() + "/" + d.ToString() + "=";
f1 = a * d + b * c;
f2 = b * d;
int g;
g = Gcd(f1, f2);
f1 = f1 / g;
f2 = f2 / g;
result = f1 / f2;
if (f1 == 0)
{
result = 0;
}
if (f2 == 1)
{
result = f1;
}
}
if (p == 5) //出分数减法题
{
if (a > b)
{
int t = a; a = b; b = t;
}
if (c > d)
{
int t = c; c = d; d = t;
}
label1.Text = a.ToString() + "/" + b.ToString() + "-" + c.ToString() + "/" + d.ToString() + "=";
f1 = a * d - b * c;
f2 = b * d;
int g;
g=Gcd(f1, f2);
f1 = f1 / g;
f2 = f2 / g;
result = f1 / f2;
if (f1 == 0)
{
result = 0;
}
if (f2 == 1)
{
result = f1;
}
}
if (p == 6) //出分数乘法题
{
if (a > b)
{
int t = a; a = b; b = t;
}
if (c > d)
{
int t = c; c = d; d = t;
}
label1.Text = a.ToString() + "/" + b.ToString() + "*" + c.ToString() + "/" + d.ToString() + "=";
f1 = a * c;
f2 = b * d;
int g;
g = Gcd(f1, f2);
f1 = f1 / g;
f2 = f2 / g;
result = f1 / f2;
if (f1 == 0)
{
result = 0;
}
if (f2 == 1)
{
result = f1;
}
}
if (p == 7) //出分数除法题
{
if (c == 0)
{
c++;
}
if (a > b)
{
int t = a; a = b; b = t;
}
if (c > d)
{
int t = c; c = d; d = t;
}
label1.Text = a.ToString() + "/" + b.ToString() + " " + "/" + " " + c.ToString() + "/" + d.ToString() + "=";
f1 = a * d;
f2 = b * c;
int g;
g = Gcd(f1, f2);
f1 = f1 / g;
f2 = f2 / g;
if (f1 == 0)
{
result = 0;
}
if (f2 == 1)
{
result = f1;
}
//result = f1 / f2;
}
}
private void label1_Click(object sender, EventArgs e)
{
}
int Gcd(int a, int b)//求最大公约数，以便对结果进行约分
{
while (a != 0 && b != 0)
{
if (a > b) a = a % b;
else if (a < b) b = b % a;
}
return (a > b ? a : b);
}
private void Form1_Load(object sender, EventArgs e)
{
ti_shu = 0;
chu_ti();
}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
string Item;
/*if (pp <= 3 || f1 == 0 || f2 == 1)
{
if (e.KeyChar == 13)//表示按下的回车键
{
if (Convert.ToInt16(textBox1.Text) == result)
{
Item = label1.Text + textBox1.Text + "√";
}
else
Item = label1.Text + textBox1.Text + "×";
this.listBox1.Items.Add(Item);
this.textBox1.Text = "";
chu_ti();
}
}
else
{*/
if (e.KeyChar == 13)//表示按下的回车键
{
if (f2==1||f1==0)
{
if (Convert.ToInt16(textBox1.Text) == result)
{
Item = label1.Text + textBox1.Text + "√";
this.listBox1.Items.Add(Item);
}
else
{
Item = label1.Text + textBox1.Text + "×";
this.listBox1.Items.Add(Item);
this.listBox2.Items.Add(Item);
}
}
else
{
if (Convert.ToString(textBox1.Text) == Convert.ToString(f1) + "/" + Convert.ToString(f2))
{
Item = label1.Text + textBox1.Text + "√";
this.listBox1.Items.Add(Item);
}
else
{
Item = label1.Text + textBox1.Text + "×";
this.listBox1.Items.Add(Item);
this.listBox2.Items.Add(Item);
}
}
this.textBox1.Text = "";
chu_ti();
}
}
private void button1_Click(object sender, EventArgs e)
{
Application.Exit();
}
}
}
