SP1 cpp Defines the entry point for the console application include st

// SP1.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <cstdio>
#include <string>
#include <vector>

using namespace std;

#define BLOCKSIZE 262144
#define WORDSIZE 32
#define WORDSIZEPLUS1 33

struct st {
	char word[WORDSIZEPLUS1];
};

vector<struct st> vec[WORDSIZE];

bool is_letter(char c) {
	if ((c>='a' && c<='z')||(c>='A' && c<='Z')||(c>='0' && c<='9')) return true;
	else return false;
}

void add_word_to_list(char cur[WORDSIZEPLUS1]) {     
	int vec_num=strlen(cur)-1;
	struct st curst;
	bool fresh = true;
	for(int i=0; i<vec[vec_num].size(); i++)
	{
		if (!strcmp(vec[vec_num].at(i).word,cur))
		{   
			fresh = false;
			break;
		}
	}
	if (fresh)
	{
		strcpy(curst.word, cur);
		vec[vec_num].push_back(curst);
	}
}

void make_word_list(FILE * work_file) {
	bool word_exist=false;
	char line[BLOCKSIZE];
	char current_word[WORDSIZEPLUS1];
	int i=0,j=0,len;
	while (fgets(line, BLOCKSIZE, work_file)) {
		//printf(".");
		if (!word_exist) for(int k=0; k<WORDSIZEPLUS1; k++) current_word[k]='\0';
		len=strlen(line);
		for(i=0; i < len; i++) {
			if (is_letter(line[i])) {
				if (j<WORDSIZE) { 
					current_word[j]=line[i];
					j++;
					word_exist = true;
				}
			}
			else if (word_exist) {
				add_word_to_list(current_word); 
				j=0;
				word_exist = false;
				for(int k=0; k<WORDSIZEPLUS1; k++) current_word[k]='\0';
			}
		}
	}
	if (word_exist) add_word_to_list(current_word); 
}

void print_list() {  
	for(int i = 0; i<WORDSIZE; i++) {
		if (!vec[i].empty()) printf("\n%d: ", i+1);
		while (!vec[i].empty())
			{
				printf("%s ", vec[i].back().word);
				vec[i].pop_back();
		}
	} 
}

int _tmain(int argc, _TCHAR* argv[])
{
	FILE * work_file;
	char file_name[64];
	printf("\nEnter the path to the text file: ");
	scanf("%s", file_name);
	work_file=fopen(file_name, "r");
	make_word_list(work_file);				
	print_list();	
	getchar();
	getchar();
	return 0;
}