想用C#做一个另类的计算器，但无从下手
--------------------编程问答-------------------- 用栈解决撒 --------------------编程问答--------------------public int EvaluateExpression()
{
SeqStack<char> optr = new SeqStack <char>(20);
SeqStack<int> opnd = new SeqStack <int>(20);
optr.Push(‘#’);
char c = Console.Read();
char theta = 0;
int a = 0;
int b = 0;
while (c != ‘#’)
{
if((c!=’+’) && (c!=’-‘)
&& (c!=’*’) && (c!=’/’)
&& (c!=’(‘) && (c!=’)’{
optr.Push(c);
}
else
{
switch(Precede(optr.GetTop(), c))
{
Case ‘<’:
optr.Push(c);
c = Console.Read();
break;
case ‘=’:
optr.Pop();
c = Console.Read();
break;
case ‘>’:
theta = optr.Pop();
a = opnd.Pop();
b = opnd.Pop();
opnd.Push(Operate(a,theta,b));
break;
}
｝
Precede判断运算符优先级。 --------------------编程问答-------------------- string s = "";
object o = new DataTable().Compute(s, "");
--------------------编程问答-------------------- 让我想起js中有个eval函数，呵呵。。。 --------------------编程问答-------------------- 我现在也在自学C#，不过刚写完这个程序，这是我编的第一个程序，需要的话可以发给你参考：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace 计算器
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void timer1_Tick(object sender, EventArgs e)
{
time.Text = DateTime.Now.ToString();
}
private void time_Click(object sender, EventArgs e)
{
}
private double nPrevValue = 0; //上一次值
private bool bAppend = true; //用户按的数字是否连接在显示的数字后面
private string strPrevOpar = ""; //上一次的操作符号
// C按钮
private void button16_Click(object sender, EventArgs e)
{
tbShow.Text = "0";
strPrevOpar = "";
bAppend = true;
nPrevValue = 0;
}
//处理数字键
private void Num_Click(object sender, System.EventArgs e)
{
string strNum = ((System.Windows.Forms.Button)sender).Text;
if (bAppend)
tbShow.Text = double.Parse(tbShow.Text + strNum).ToString();
else
{
tbShow.Text = strNum;
bAppend = true;
}
}
//操作符号
private void Opar_Click(object sender, EventArgs e)
{
double nCurValue = double.Parse(tbShow.Text);
switch (strPrevOpar)
{
case "+":
nCurValue += nPrevValue;
break;
case "-":
nCurValue = nPrevValue - nCurValue;
break;
case "*":
nCurValue *= nPrevValue;
break;
case "/":
nCurValue = nPrevValue / nCurValue;
break;
case "sqrt":
nCurValue = nCurValue * nCurValue;
break;
default:
break;
}
strPrevOpar = ((System.Windows.Forms.Button)sender).Text;
bAppend = false;
tbShow.Text = nCurValue.ToString();
nPrevValue = nCurValue;
}
private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
{
this.Close();
}
private void 关于ToolStripMenuItem_Click(object sender, EventArgs e)
{
MessageBox.Show("版本号：1.0.0.0 ");
}
private void 作者ToolStripMenuItem_Click(object sender, EventArgs e)
{
MessageBox.Show("作者：");
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void 复制ToolStripMenuItem_Click(object sender, EventArgs e)
{
this.tbShow.SelectAll();
this.tbShow.Copy();
}
private void 粘贴ToolStripMenuItem_Click(object sender, EventArgs e)
{
this.tbShow.Paste();
}
private void dot_Click(object sender, EventArgs e)
{
string strNum = ((System.Windows.Forms.Button)sender).Text;
tbShow.Text = tbShow.Text + strNum;
}
--------------------编程问答-------------------- 怎么都放在TextBox中？不是自己找事吗~
补充：.NET技术 , C#
