main.cpp

C++编写的词法分析器

#include "wordAnalyse.h"
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
using namespace std;
using namespace cmm;

int main(int argc, char* argv[])
{	
	if (argc==1 || argc>2) 
  {	
  	cout << "usage :" << "cmm [filename]" <<endl; 
  	return 0;
  }
  	
	string filename(argv[1]);
	ifstream infile(filename.c_str());
	if (!infile)
	{
	  cout <<	"no file named \"" << filename << "\" exist!" << endl; 
	}
	vector<string> word_peaces;
	
  string word("abc*123-zxy");
  while ( infile >> word )
  {
  	word_peaces.clear();
  	word_peaces=breaks(word);
  	for (vector<string>::iterator vsi=word_peaces.begin(); vsi!=word_peaces.end(); ++vsi)
  	{	
  	  int code=transform(*vsi);
      if (code==-1) 
        cout << "[ -1 ,  error ]" << endl;
      else 
        cout << "[ " << code << " ,  " << *vsi << "  ]" <<endl;
    }
  }
  	
  return 0;	
}