C++ program to split a file into single words

split.cpp

/*
 * This little program splits a whole file into single words,
 * which get saved in a list.
 * A word is everything between two non-printable characters.
 *
 * Made by @benaryorg (2014)
 * License: WTFPL
 */

#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cctype>
#include <iostream>
#include <fstream>
#include <list>

#define BUF_SIZE 4096 //Should be longer than the longest word, else the word will get split.

using namespace std;

int main(int argc,char **argv)
{
	if(argc!=2)
	{
		cerr<<"Wrong Parameters!"<<endl;
		cerr<<"Usage: "<<*argv<<" file"<<endl;
		return -1;
	}

	ifstream file(argv[1],ifstream::in);
	list<string> words;

	char str[BUF_SIZE]={};
	int i,j;

	while(file.good())
	{
		file.read(str+strlen(str),BUF_SIZE-1-strlen(str));
		for(i=j=0;i<BUF_SIZE-1;i++)
		{
			if(!isgraph(str[i]))
			{
				str[i]=0;
				if(strlen(str+j))
				{
					words.push_back(string(str+j));
				}
				j=i+1;
			}
		}
		if(!j)
		{
			words.push_back(string(str+j));
			*str=0;
		}
		memcpy(str,str+j,BUF_SIZE-j);
		memset(str+BUF_SIZE-j,0,j);
	}

	while(!words.empty())
	{
		cout<<words.front()<<endl;
		words.pop_front();
	}

	file.close();

	return 0;
}