版权声明：本人菜鸟一只，如文章有错误或您有高见，请不吝赐教 https://blog.csdn.net/qq_41138935/article/details/82750974
c#计算器，支持+-*/()的混合运算，没有负号.
原理:将点击的按钮赋给inputStr，然后对inputStr分析、计算。
吐槽下这个方法，有很多功能不是很好做，大家借鉴就好，不必当真。
代码有限，很多BUG和部分功能不完善。
截图：
运行截图:
界面控制代码：
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
{
public partial class FrmMain : Form
{
public static List<char> inputStr=new List<char>(1000); //用户的输入
public FrmMain()
{
InitializeComponent();
}
private void Btn0_Click(object sender, EventArgs e)
{
inputStr.Add('0');
textBox1.AppendText("0");
}
private void BtnDot_Click(object sender, EventArgs e)
{
inputStr.Add('.');
textBox1.AppendText(".");
}
private void Btn1_Click(object sender, EventArgs e)
{
inputStr.Add('1');
textBox1.AppendText("1");
}
private void Btn2_Click(object sender, EventArgs e)
{
inputStr.Add('2');
textBox1.AppendText("2");
}
private void Btn3_Click(object sender, EventArgs e)
{
inputStr.Add('3');
textBox1.AppendText("3");
}
private void Btn4_Click(object sender, EventArgs e)
{
inputStr.Add('4');
textBox1.AppendText("4");
}
private void Btn5_Click(object sender, EventArgs e)
{
inputStr.Add('5');
textBox1.AppendText("5");
}
private void Btn6_Click(object sender, EventArgs e)
{
inputStr.Add('6');
textBox1.AppendText("6");
}
private void Btn7_Click(object sender, EventArgs e)
{
inputStr.Add('7');
textBox1.AppendText("7");
}
private void Btn8_Click(object sender, EventArgs e)
{
inputStr.Add('8');
textBox1.AppendText("8");
}
private void Btn9_Click(object sender, EventArgs e)
{
inputStr.Add('9');
textBox1.AppendText("9");
}
private void BtnLeft_Click(object sender, EventArgs e)
{
inputStr.Add('(');
textBox1.AppendText("(");
}
private void BtnRig_Click(object sender, EventArgs e)
{
inputStr.Add(')');
textBox1.AppendText(")");
}
private void BtnEqual_Click(object sender, EventArgs e)
{
//等号代码
textBox1.AppendText("=");
textBox2.Text = textBox1.Text;
textBox1.Text = DataOp.DataMain();
string temp= DataOp.DataMain();
inputStr.Clear();
for(int i = 0; i < temp.Length; i++)
{
inputStr.Add(temp[i]);
}
}
private void BtnAdd_Click(object sender, EventArgs e)
{
inputStr.Add('+');
textBox1.AppendText("+");
}
private void BtnSubt_Click(object sender, EventArgs e)
{
inputStr.Add('-');
textBox1.AppendText("-");
}
private void BtnMul_Click(object sender, EventArgs e)
{
inputStr.Add('*');
textBox1.AppendText("*");
}
private void BtnDivi_Click(object sender, EventArgs e)
{
inputStr.Add('/');
textBox1.AppendText("/");
}
private void BtnCe_Click(object sender, EventArgs e)
{
textBox1.Text = "";
inputStr.Clear(); //清空链表的所有元素
}
private void BtnC_Click(object sender, EventArgs e)
{
//界面撤销
inputStr.RemoveAt(inputStr.Count-1);
textBox1.Text = "";
for (int i=0;i<inputStr.Count;i++)
{
textBox1.Text += inputStr[i];
}
}
}
}
数据操作代码:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace 计算器
{
//表达式存在inputStr中
class DataOp : FrmMain
{
static Stack<double> m = new Stack<double>();//数字栈
static Stack<char> s = new Stack<char>();//符号栈
public static void Read() //Read()从inputStr输入流中读值
{
for (int i = 0; i < inputStr.Count; i++)
{
if (!IsOperator(inputStr[i])) //数字和小数点
{
string s = null;
while (i < inputStr.Count && !IsOperator(inputStr[i]))
{
s += inputStr[i];
i++;
}
i--;
double mm = Convert.ToDouble(s);
m.Push(mm);
}
else if (IsOper(inputStr[i])) //+ - * /
{
if (s.Count.Equals(0) || s.Peek().Equals('('))
{
s.Push(inputStr[i]);
}
else if (OperatorPrecedence(inputStr[i]) > OperatorPrecedence(s.Peek()))
{
s.Push(inputStr[i]);
}
else
{
double n1, n2;
char s1;
n2 = m.Pop();
n1 = m.Pop();
s1 = s.Pop();
double sum = Operat(n1, n2, s1);
m.Push(sum);
s.Push(inputStr[i]);
}
}
else //（和）
{
if (inputStr[i].Equals('('))
{
s.Push(inputStr[i]);
}
else if (inputStr[i].Equals(')'))
{
while (!s.Peek().Equals('('))
{
double n1, n2;
char s1;
n2 = m.Pop();
n1 = m.Pop();
s1 = s.Pop();
double sum = Operat(n1, n2, s1);
m.Push(sum);
}
s.Pop();
}
}
}
}
public static double PopStack()
{
double sum = 0;
while (s.Count != 0)
{
double n1, n2;
char s1;
n2 = m.Pop();
n1 = m.Pop();
s1 = s.Pop();
sum = Operat(n1, n2, s1);
m.Push(sum);
}
return sum;
}
public static bool IsOperator(char c) //是否是操作符
{
if (c.Equals('+') || c.Equals('-') || c.Equals('*') || c.Equals('/') || c.Equals('(') || c.Equals(')'))
return true;
return false;
}
public static bool IsOper(char c) //是否是运算符符
{
if (c.Equals('+') || c.Equals('-') || c.Equals('*') || c.Equals('/'))
return true;
return false;
}
public static int OperatorPrecedence(char a) //操作符优先级
{
int i = 0;
switch (a)
{
case '+': i = 3; break;
case '-': i = 3; break;
case '*': i = 4; break;
case '/': i = 4; break;
}
return i;
}
public static double Operat(double n1, double n2, char s1)
{
double sum = 0;
switch (s1)
{
case '+': sum = n1 + n2; break;
case '-': sum = n1 - n2; break;
case '*': sum = n1 * n2; break;
case '/': sum = n1 / n2; break;
}
return sum;
}
public static string DataMain()
{
Read();
return PopStack().ToString();
}
}
}
扫描二维码关注公众号，回复：
3301109 查看本文章
