mystring1.cpp

词法分析程序

// MyString1.cpp: implementation of the MyString class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "SmartC.h"
#include "MyString1.h"

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

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
/*MyString::MyString()
{
	front=NULL;
	current=NULL;
	rear=NULL;
	line_no=0;
}
MyString::~MyString()
{
	Node* temp;
	current=front;
	while(current)
	{
		temp=current;
		current=current->next;
		delete temp;	
	}
	front=NULL;
	rear=NULL;
	line_no=0;
}
void MyString::del()
{
	Node* temp;
	current=front;
	while(current)
	{
		temp=current;
		current=current->next;
		delete temp;	
	}
	front=NULL;
	rear=NULL;
	line_no=0;
}
void MyString::insert(char *pch)
{
	int len=strlen(pch);
	char* p= new char [len+1];
	strcpy(p,pch);
	Node* node=new Node;
	node->pchar=p;
	node->next=NULL;
	if(front==NULL)
	{
		front=node;
		rear=node;
		current=node;
		line_no++;
	}
	else
	{
		rear->next=node;
		rear=rear->next;
		line_no++;
	}
}
Node* MyString::getnext()
{
	Node* temp;
	temp=current;
	if(current)
		current=current->next;
	return temp;
}
int MyString::getline_no()
{
	return line_no;
}
void MyString::reset()
{
	current=front;
}*/
////////my fuction
void insertline(Node* node,int* linenum,char* string)
{
	int len=strlen(string);
	Node* temp=node;
	while(temp->next)
	{
		temp=temp->next;
	}
	temp->next=new Node;
	temp->next->next=NULL;
	temp->next->pchar=new char[len+1];
	strcpy(temp->next->pchar,string);
	*linenum+=1;	
}
void freenode(Node* node,int* linenum)
{
	Node* temp;
	while(node->next)
	{
		temp=node->next;
		node->next=node->next->next;
		delete [] temp->pchar;
		delete temp;
	}
	*linenum=0;	
}