实例介绍
【实例简介】
实现加减乘除平方开方ln和log功能
【实例截图】
【核心代码】
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace 计算器2
{
public partial class Form1 : Form
{
double a = 0;
double b = 0;
bool c = false;
string d;
public Form1()
{
InitializeComponent();
}
private void button9_Click(object sender, EventArgs e)
{
if(c==true )
{
textBox1.Text = "";
c = false;
}
textBox1.Text = "1";
}
private void button10_Click(object sender, EventArgs e)
{
if (c == true)
{
textBox1.Text = "";
c = false;
}
textBox1.Text = "2";
}
private void button11_Click(object sender, EventArgs e)
{
if (c == true)
{
textBox1.Text = "";
c = false;
}
textBox1.Text = "3";
}
private void button5_Click(object sender, EventArgs e)
{
if (c == true)
{
textBox1.Text = "";
c = false;
}
textBox1.Text = "4";
}
private void button6_Click(object sender, EventArgs e)
{
if (c == true)
{
textBox1.Text = "";
c = false;
}
textBox1.Text = "5";
}
private void button7_Click(object sender, EventArgs e)
{
if (c == true)
{
textBox1.Text = "";
c = false;
}
textBox1.Text = "6";
}
private void button1_Click(object sender, EventArgs e)
{
if (c == true)
{
textBox1.Text = "";
c = false;
}
textBox1.Text = "7";
}
private void button2_Click(object sender, EventArgs e)
{
if (c == true)
{
textBox1.Text = "";
c = false;
}
textBox1.Text = "8";
}
private void button3_Click(object sender, EventArgs e)
{
if (c == true)
{
textBox1.Text = "";
c = false;
}
textBox1.Text = "9";
}
private void button13_Click(object sender, EventArgs e)
{
if (c == true)
{
textBox1.Text = "";
c = false;
}
textBox1.Text = "0";
if(d =="/")
{
textBox1.Clear();
MessageBox.Show("除数不能为零", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
//
}
}
private void button4_Click(object sender, EventArgs e)
{
c = true;
b = double.Parse(textBox1.Text);
d = " ";
}
private void button8_Click(object sender, EventArgs e)
{
c = true;
b = double.Parse(textBox1.Text);
d = "-";
}
private void button12_Click(object sender, EventArgs e)
{
c = true;
b = double.Parse(textBox1.Text);
d = "*";
}
private void button16_Click(object sender, EventArgs e)
{
c = true;
b = double.Parse(textBox1.Text);
d = "/";
}
private void button17_Click(object sender, EventArgs e)
{
c = true;
b = double.Parse(textBox1.Text);
d = "x²";
}
private void button18_Click(object sender, EventArgs e)
{
c = true;
b = double.Parse(textBox1.Text);
d = "sqrt";
}
private void button19_Click(object sender, EventArgs e)
{
c = true;
b = double.Parse(textBox1.Text);
d = "log";
if (b <= 0)
{
textBox1.Clear();
MessageBox.Show("真数不能小于等于零", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
private void button20_Click(object sender, EventArgs e)
{
c = true;
b = double.Parse(textBox1.Text);
d = "ln";
if (b <= 0)
{
textBox1.Clear();
MessageBox.Show("真数不能小于等于零", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
private void button14_Click(object sender, EventArgs e)
{
textBox1.Text = "";
}
private void button15_Click(object sender, EventArgs e)
{
switch (d)
{
case " ": a = b double.Parse(textBox1.Text); break;
case "-": a = b - double.Parse(textBox1.Text); break;
case "*": a = b * double.Parse(textBox1.Text); break;
case "/": a = b / double.Parse(textBox1.Text); break;
case "x²": a = b * double.Parse(textBox1.Text);break;
case "sqrt":a = Math.Sqrt(b);break;
case "log":a = Math.Log(double.Parse(textBox1.Text), b);break;
case "ln":a = Math.Log(b, Math.E);break;
}
textBox1.Text = a "";
c = true;
}
}
}
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