transdlg.cpp

主要实现了波兰式和逆波兰式的转换

// TRANSDlg.cpp : implementation file
//

#include "stdafx.h"
#include "TRANS.h"
#include "TRANSDlg.h"
#include "math.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTRANSDlg dialog

CTRANSDlg::CTRANSDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CTRANSDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CTRANSDlg)
	m_BehindStr = _T("");
	m_Result = 0;
	m_MiddleStr = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CTRANSDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CTRANSDlg)
	DDX_Text(pDX, IDC_EDIT2, m_BehindStr);
	DDX_Text(pDX, IDC_EDIT3, m_Result);
	DDX_Text(pDX, IDC_EDIT1, m_MiddleStr);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CTRANSDlg, CDialog)
	//{{AFX_MSG_MAP(CTRANSDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	ON_BN_CLICKED(ID_flash, Onflash)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTRANSDlg message handlers

BOOL CTRANSDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CTRANSDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CTRANSDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CTRANSDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CTRANSDlg::OnButton1() 
{
	// TODO: Add your control notification handler code here

	UpdateData(TRUE);
	linkstack.InitStack(linkstack.StrStack);//初始化
    linkstack.InitStack(Linkstack.StrStack);//初始化

	if(IsError())
	{

    WordAnalyze();
	LangAnalyze();
	if(IsOper())
	Operate();

	}
    else
	{
		MessageBox("语法错误!");
        Onflash();
	}

    UpdateData(FALSE);
}

/////////////////////////////////////////////////////////////////////////////

void CTRANSDlg::WordAnalyze()
{
	char str[10]={0},Str[2]={0},STR[10]={0};//str记录操作数 Str记录操作符
	char oper;
	int j=0,k;
	int len=m_MiddleStr.GetLength();

    STACK Reverse;//栈，便于字符串变量输出
	Reverse.InitStack(Reverse.StrStack);
	char reverse[1]={0};

	if(m_MiddleStr=="")//当输入为空时
	{
		MessageBox("语法错误!");
        Onflash();
	}

    
	else
		if(Switch(m_MiddleStr.GetAt(0))!=-1&&Switch(m_MiddleStr.GetAt(0))!=4)
		{
		MessageBox("语法错误!");
        Onflash();
		}
		else{

	for(int i=len-1;i>=0;i--)                
	{   
		oper=m_MiddleStr.GetAt(i);
		int flag=Switch(oper);
		
		if(flag==-1)//当为操作数时
		{   
		
	        reverse[0]=oper;
			Reverse.Push(Reverse.StrStack,reverse);
		}
		else 
			if(flag==-2||flag==4)//处理括号
			{   
			    k=0;
				
				
		    	while(Reverse.StrStack->next!=NULL)
				{
					Reverse.Pop(Reverse.StrStack,reverse);
				    str[k++]=reverse[0];
				}
			    str[k]=' ';
				if(str[0]!=' '&&str[0]!=0)
			
			    linkstack.Push(linkstack.StrStack,str);//压栈
				
				for(int i=0;i<10;i++)
					if(str[i]!=0)
						str[i]=0;
				
				j=0;
				Str[0]=oper;
		        linkstack.Push(linkstack.StrStack,Str);
			}

		else  //当为操作符时
		{   k=0;
		    
			while(Reverse.StrStack->next!=NULL)
			{

				Reverse.Pop(Reverse.StrStack,reverse);
				str[k++]=reverse[0];
			}
			str[k]=' ';
            
			if(str[0]!=' '&&str[0]!=0)
			linkstack.Push(linkstack.StrStack,str);//压栈

            for(int i=0;i<10;i++)//清空str
					if(str[i]!=0)
						str[i]=0;
			j=0;
			Str[0]=oper;
		    linkstack.Push(linkstack.StrStack,Str);//操作符压栈
		}
	}
    k=0;
	while(Reverse.StrStack->next!=NULL)//处理剩余字符 
	{
		Reverse.Pop(Reverse.StrStack,reverse);
		str[k++]=reverse[0];
		
	}

	str[k]=' ';
	linkstack.Push(linkstack.StrStack,str);
		}
}

/////////////////////////////////////////////////////////////////////////////
int CTRANSDlg::Switch(char oper) //判断优先级
{
	switch(oper)
	{
	//case '#' :return -2;
	case '-' :return 0;
	case '+' :return 0;
	case '*' :return 1;
	case '/' :return 1;
	case '^' :return 2;
	case ')' :return -2;
	case '(' :return 4;
    default  :return -1;
	}
}

/////////////////////////////////////////////////////////////////////////////

void CTRANSDlg::LangAnalyze()
{
	int flag1,flag2;//记录优先级
	STACK Opnd;    //操作符栈
	Opnd.InitStack(Opnd.StrStack);
	char str[10]={0},AllStr[100]={0},Str[1]={0};//str记录操作数 Str记录操作符

	char opnd[10]={0};
	opnd[0]='#';
	Opnd.Push(Opnd.StrStack,opnd);//输入#到栈底

	
	while(linkstack.StrStack->next!=NULL)
	{
		linkstack.Pop(linkstack.StrStack,str);
    	if(Switch(str[0])==4)//处理左括号
		{
			Opnd.Push(Opnd.StrStack,str);
		}
		else 
			if(	Switch(str[0])==-2)//处理右括号
			{
				flag1=Switch(str[0]);
                Opnd.GetTop(Opnd.StrStack,Str);
			    flag2=Switch(Str[0]);
			    while(flag2!=4)//出栈直至左括号
				{
					Opnd.Pop(Opnd.StrStack,Str);
                    strcat(AllStr,Str);
				    Opnd.GetTop(Opnd.StrStack,Str);
				    flag2=Switch(Str[0]);
				
				}
			
				Opnd.Pop(Opnd.StrStack,Str);
				
			}
			else
				if(Switch(str[0])==-1)//字符直接输出
				{
                   strcat(AllStr,str);
				 }
				else
				{
					flag1=Switch(str[0]);
		            Opnd.GetTop(Opnd.StrStack,Str);
		            flag2=Switch(Str[0]);
		            if(flag1>flag2||flag2==4||flag1==2&&flag2==2)//优先级别高的入栈
						Opnd.Push(Opnd.StrStack,str);
					else
						{ 
						
						while(flag1<=flag2&&flag2!=4)
						{
					    
						Opnd.Pop(Opnd.StrStack,Str);//优先级别小于等于栈顶，将栈顶输出
		                strcat(AllStr,Str);
						Opnd.GetTop(Opnd.StrStack,Str);
						flag2=Switch(Str[0]);
						
						}
					
                        Opnd.Push(Opnd.StrStack,str);//优先级别小的入栈
					}
				}
	}
    
    Opnd.Pop(Opnd.StrStack,Str);	
	while(Str[0]!='#')//将操作符输出
	{
		strcat(AllStr,Str);
	
		Opnd.Pop(Opnd.StrStack,Str);
	}

	m_BehindStr.Insert(0,AllStr);//输出结果
}

/////////////////////////////////////////////////////////////////////////////

void CTRANSDlg::Operate()
{
	STACK Oper;
	Oper.InitStack(Oper.StrStack);
	
	int Len=m_BehindStr.GetLength();
	int flag=0,result=0;
	char str[10]={0},Str[10];
	char sstr[10]={0};

    int j=0,f;char x;
	for(int i=0;i<Len;i++)
	{   f=0;
		x=m_BehindStr.GetAt(i);
		flag=OperSwitch(x);
		if(x!=' '&&flag==-1)
		{
			f=1;
			sstr[j++]=m_BehindStr.GetAt(i);
		}
		else
		{
			j=0;
			if(sstr[0]!=' '&&f==0&&flag==-1)
			{
			Oper.Push(Oper.StrStack,sstr);

			for(int i=0;i<10;i++)//清空sstr
					 if(sstr[i]!=0)
						sstr[i]=0;
			}

            flag=OperSwitch(x);
             switch(flag)
			 {
			 case -1:break;
			 
			 case 0:
				 {  
					 Oper.Pop(Oper.StrStack,str);
				     Oper.Pop(Oper.StrStack,Str);
				     result=atoi(Str)-atoi(str);//减法
					 for(int i=0;i<10;i++)//清空str
					 if(str[i]!='0')
						str[i]=0;
					 itoa(result,str,10);
					 Oper.Push(Oper.StrStack,str);
                     
					 break;
				 }
		      case 1:
				 {  
                     Oper.Pop(Oper.StrStack,str);
				     Oper.Pop(Oper.StrStack,Str);
				     result=atoi(str)+atoi(Str);//加法
					 for(int i=0;i<10;i++)//清空str
					 if(str[i]!='0')
						str[i]=0;
					 itoa(result,str,10);
					 Oper.Push(Oper.StrStack,str);
				     break;
				 }
		     case 2:
				 {  
                     Oper.Pop(Oper.StrStack,str);
				     Oper.Pop(Oper.StrStack,Str);
			       	 result=atoi(str)*atoi(Str);//乘法
					 for(int i=0;i<10;i++)//清空str
					 if(str[i]!='0')
						str[i]=0;
					 itoa(result,str,10);
					 Oper.Push(Oper.StrStack,str);
				     break;
				 }
		     case 3:
				 {  
                     Oper.Pop(Oper.StrStack,str);
				     Oper.Pop(Oper.StrStack,Str);
				     result=atoi(Str)/atoi(str);//除法
					 for(int i=0;i<10;i++)//清空str
					 if(str[i]!='0')
						str[i]=0;
					 itoa(result,str,10);
					 Oper.Push(Oper.StrStack,str);
				     break;
				 }
			 case 4:
				 {
				     Oper.Pop(Oper.StrStack,str);
					 Oper.Pop(Oper.StrStack,Str);
					 result=(int)pow(atoi(Str),atoi(str));//乘方
					 for(int i=0;i<10;i++)//清空str
					 if(str[i]!='0')
						str[i]=0;
					 itoa(result,str,10);
					 Oper.Push(Oper.StrStack,str);
                     break;
					
				 }
			 }
		 }
	}
	m_Result=result;
}

/////////////////////////////////////////////////////////////////////////////

int CTRANSDlg::OperSwitch(char x)
{
	switch(x)
	{

	case '-' :return 0;
	case '+' :return 1;
	case '*' :return 2;
	case '/' :return 3;
	case '^' :return 4;
    default  :return -1;
	}

}

/////////////////////////////////////////////////////////////////////////////

void CTRANSDlg::Onflash() //刷新函数
{
	// TODO: Add your control notification handler code here
	UpdateData(TRUE);
	m_MiddleStr="";
	m_BehindStr="";
	m_Result=0;
	UpdateData(FALSE);

	
}

/////////////////////////////////////////////////////////////////////////////

int CTRANSDlg::IsError()
{
        int flag1=0,flag2=0,p=0,t=0; 
		int left[5],right[5];

		int Len=m_MiddleStr.GetLength();
		for(int i=0;i<Len;i++)
		{
			int oper=m_MiddleStr.GetAt(i);
			if(oper=='(') left[p++]=1;
			else
				if(oper==')') right[t++]=1;
		}

		flag1=0;flag2=0;

		for(i=0;i<5;i++)
		{
			if(left[i]==1) 
				flag1++;
			if(right[i]==1)
				flag2++;
		}

		if(flag1!=flag2)
			return 0;
		else
			return 1;

}
/////////////////////////////////////////////////////////////////////////////

int CTRANSDlg::IsOper()
{
	int flag=0;
	int Len=m_MiddleStr.GetLength();
	for(int i=0;i<Len;i++)
	{
		int oper=m_MiddleStr.GetAt(i);
		if(oper>='a'&&oper<='z'||oper>='A'&&oper<='Z')
			flag=1;
	}
	if(flag==0)
		return 1;
	else
		return 0;

}
/////////////////////////////////////////////////////////////////////////////