-
编程语言
站-
热门城市 全国站>
-
其他省市
-
-
400-636-0069
白羽
2018-07-10
来源 ：网络
阅读 1602
评论 0
摘要：本文将带你了解C#编程之学习简单计算器 ，希望本文对大家学C#/.Net有所帮助。
实现加减乘除 平方开放倒数 键盘输入
历史记录查询和删除
未实现记忆加减功能
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 WindowsFormsApplication3
{
public partial class MainForm : Form
{
public MainForm()
{
InitializeComponent();
}
/*连等功能
///存储最近输入的数字e_Num和最近的操作e_Op
///button CE 保存e_Num,而button C 清空e_Num和e_Op
double e_Num = 0;
double e_Res=0;
string e_Op="";
//*/
string op="";//运算符
double num1=0;
double num2=0;
double res=0;
int iOp = 0;//运算符位置
bool newOp = true; //开始新的运算
bool addOp = false;
//键入数字
private void button_Click_Num(object sender, EventArgs e)
{
if (newOp)
{
textNumBox.Text = "";
newOp = false;
addOp = false;
/*
e_Num = num2;
e_Res=res;
e_Op=op;
//*/
}
///* 获取button值，赋值给textNumBox.Ttext
///多个button的Click事件同时命名为button_Click_Num
///实现批量的button_Click_Num的操作
Button tempNum = (Button) sender;
textNumBox.Text += tempNum.Text.ToString();
//*/
}
private void button_Click_Op(object sender, EventArgs e)
{
Button tempOp = (Button)sender;
operater(tempOp.Text.ToString());
}
private void operater(string oper)
{
if (addOp)
{
textNumBox.Text = Convert.ToString(res) + oper;
newOp = false;
}
else
{
textNumBox.Text += oper;
}
op=oper;
//e_Op=tempOp.Text.Tostring();
//e_num1=textNumBox.Text.Substring(0, textNumBox.Text.Length - 1);
//e_num2=textNumBox.Text.SkipWhile<char>(char i,result<char,i=='+'||i=='-'||i=='×'||i=='÷'>predicate);//并不会用该函数
}
private void operater(char oper)
{
if (addOp)
{
newOp = false;
}
op = Convert.ToString(oper);
//e_Op=tempOp.Text.Tostring();
//e_num1=textNumBox.Text.Substring(0, textNumBox.Text.Length - 1);
//e_num2=textNumBox.Text.SkipWhile<char>(char i,result<char,i=='+'||i=='-'||i=='×'||i=='÷'>predicate);//并不会用该函数
}
private void button_Click_Del(object sender, EventArgs e)
{
if (textNumBox.Text.Length > 0)
{
textNumBox.Text = textNumBox.Text.Substring(0, textNumBox.Text.Length - 1);
newOp = false;
}
}
private void button_Click_CE(object sender, EventArgs e)
{
textNumBox.Text = "";
newOp = true;
}
private void button_Click_C(object sender, EventArgs e)
{
textNumBox.Text = "";
/*
e_Num = 0;
e_Op = "";
//*/
}
private void button_Click_Result(object sender, EventArgs e)
{
try
{
//if (newOp) 不要在result里判断是否是重新开始的计算，而是更新textNumBox.Text
//{
result();
res = Operate(op);
newOp = true;
addOp = true;
Common.historylist.Add(textNumBox.Text);
//}
//else
//{
// result(res);
// res = Operate(op);
//}
}
catch (Exception exc)
{
textNumBox.Text= "Error";
newOp = false;
addOp = true;
}
}
private void result()
{
iOp = textNumBox.Text.IndexOf(op);
num1 = Convert.ToDouble(textNumBox.Text.Substring(0, iOp));
num2 = Convert.ToDouble(textNumBox.Text.Substring(iOp + 1, textNumBox.Text.Length - iOp - 1));//-iOp,第二个参数是substring起始之后多少个
}
//private void result(double oldnum)
//{
// iOp=textNumBox.Text.LastIndexOf(op);
// num1 = oldnum;
// num2 = Convert.ToDouble(textNumBox.Text.Substring(iOp + 1, textNumBox.Text.Length - iOp - 1));
//}
private double Operate(string opp)
{
double ress;
if (op == "+")
{
ress = num1 + num2;
textNumBox.Text += "=" + ress;
}
else if (op == "-")
{
ress = num1 - num2;
textNumBox.Text += "=" + ress;
}
else if (op == "×")
{
ress = num1 * num2;
textNumBox.Text += "=" + ress;
}
else if (op == "÷")
{
ress = num1 / num2;
textNumBox.Text += "=" + ress;
}
else
{
ress = 0;
}
return ress;
}
private void button_Click_fushu(object sender, EventArgs e)
{
textNumBox.Text += "-";
newOp = false;
Common.historylist.Add(textNumBox.Text);
}
private void button_Click_pingfanggen(object sender, EventArgs e)
{
double numtemp;
try
{
numtemp = Convert.ToDouble(textNumBox.Text);
}
catch (System.FormatException) //不能转化为double的异常下用res结果计算
{
numtemp = res;
}
res = Math.Sqrt(numtemp);
textNumBox.Text = "√（" + numtemp + ")=" + res;
newOp = true;
Common.historylist.Add(textNumBox.Text);
}
private void button_Click_daoshu(object sender, EventArgs e)
{
double numtemp;
try
{
numtemp = Convert.ToDouble(textNumBox.Text);
}
catch (System.FormatException) //不能转化为double的异常下用res结果计算
{
numtemp = res;
}
res = 1/numtemp;
textNumBox.Text = "1/（" + numtemp + ")=" + Convert.ToString(res);
newOp = true;
Common.historylist.Add(textNumBox.Text);
}
private void Click_About(object sender, EventArgs e)
{
About aboutbox = new About(); //打开新的窗口，要先new 方法
aboutbox.ShowDialog();
}
private void Click_History(object sender, EventArgs e)
{
History historybox = new History(); //打开新的窗口，要先new 方法
historybox.ShowDialog();
}
private void Click_PasteNow(object sender, EventArgs e)
{
textNumBox.Text += Clipboard.GetText();
}
private void Click_CopyNow(object sender, EventArgs e)
{
Clipboard.SetText(textNumBox.Text);
}
bool flag = true;
private void KeyPress_EqueKey(object sender, KeyPressEventArgs e)
{
switch (e.KeyChar)
{
case '=':
{
if (flag)
{
flag = false;
try
{
//if (newOp) 不要在result里判断是否是重新开始的计算，而是更新textNumBox.Text
{
//textNumBox.Text += "=";
//result();
//if (textNumBox.Text.Length > 0)
//{
// textNumBox.Text = textNumBox.Text.Substring(0, textNumBox.Text.Length - 2);
// newOp = false;
//}
iOp = textNumBox.Text.IndexOf(op);
int op0 = textNumBox.Text[0];//(0);
int op1 = textNumBox.Text[1];
num1 = Convert.ToDouble(textNumBox.Text.Substring(0, iOp));
//string temp = textNumBox.Text.Substring(iOp + 1, textNumBox.Text.Length - iOp-1);
num2 = Convert.ToDouble(textNumBox.Text.Substring(iOp + 1, textNumBox.Text.Length - iOp - 1));//-iOp,第二个参数是substring起始之后多少个
res = Operate(op);
newOp = true;
addOp = true;
Common.historylist.Add(textNumBox.Text);
}
//else
//{
// result(res);
// res = Operate(op);
//}
}
catch (Exception exc)
{
textNumBox.Text = "Error";
newOp = false;
addOp = true;
}
}
else
{
flag = true;
//textNumBox.Text.Substring(1, textNumBox.Text.Length - 1);
}
break;
}
case '+':
{
operater('+');
break;
}
case '-':
{
operater('-');
break;
}
case '*':
{
operater('×');
break;
}
case '/':
{
operater('÷');
break;
}
}
}
}
//历史记录传递
public class Common
{
public static List<string> historylist = new List<string>();
public static int a = 0;
}
}
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 WindowsFormsApplication3
{
public partial class History : Form
{
public History()
{
InitializeComponent();
}
private void button_Click_Copy(object sender, EventArgs e)
{
Clipboard.SetText(listBox1.Items[listBox1.SelectedIndex].ToString());
}
private void button_Click_Delete(object sender, EventArgs e)
{
//listBox1.ClearSelected();
//listBox1.Items.Clear(); 清除全部
int sel = listBox1.SelectedIndex;
listBox1.Items.RemoveAt(sel);
}
private void History_Load(object sender, EventArgs e)
{
foreach (string a in Common.historylist)
{
listBox1.Items.Add(a);
}
}
}
}
以上就介绍了C#.NET的相关知识，希望对C#.NET有兴趣的朋友有所帮助。了解更多内容，请关注职坐标编程语言C#.NET频道！
喜欢 | 0
不喜欢 | 0
您输入的评论内容中包含违禁敏感词
我知道了
请输入正确的手机号码
请输入正确的验证码
您今天的短信下发次数太多了，明天再试试吧！
我们会在第一时间安排职业规划师联系您！
您也可以联系我们的职业规划师咨询：
版权所有 职坐标-一站式IT培训就业服务领导者 沪ICP备13042190号-4
上海海同信息科技有限公司 Copyright ©2015 www.zhizuobiao.com，All Rights Reserved.
沪公网安备 31011502005948号
索取资料
答疑解惑
技术交流
职业测评
面试技巧
高薪秘笈
