cantidad de palabras y buscar una palabra en archivo

/*
 * lee palabras.c
 *
 * Copyright 2011 Erick Merino Menares <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 *
 *
 */


#include <stdio.h>

int main()
{
    int i, cont;
    int j=0;
    int ch;
    char Palabra[100][50];
    char nombre[100];
    char buscar[100];
    int rebusq[100];
    int cont2=0;
    int drebusq[100];
    FILE *f1;
    printf("Ingrese el nombre del archivo: ");
    scanf("%s", nombre);
    f1=fopen(nombre, "r");
    if(f1==NULL)
    {
        printf("Error, no existe el archivo");
        exit(0);
    }
    else
    {
        cont=0;
        while((ch=getc(f1))!=EOF)
        {
            i=ch;
            if(((i>=65) && (i<=90)) || ((i>=97) && (i<=122))) //65 al 90 mayusculas y 97 al 122 minusculas no acepta acentos (no los lee).
            {
                Palabra[cont][j]=(char)(ch);
                j++;
            }
            else
            {
                if(ch==((int)(' ')))
                {
                    cont++;
                    j=0;
                }
            }
        }
    }
    printf("La cantidad de palabras son: %d\n", cont+1);
    for(i=0;i<=cont;i++)
    {
        for(j=0;j<50;j++)
        {
            printf("%c", Palabra[i][j]);
        }
        printf(" ");
    }
    printf("\nIngrese la palabra a buscar: ");
    scanf("%s", buscar);
    for(i=0;i<=cont;i++)
    {
        for(j=0;j<50;j++)
        {
            if(buscar[j]!=Palabra[i][j])
            {
                rebusq[i]=-1;
            }
        }
    }
    for(i=0;i<=cont;i++)
    {
        if(rebusq[i]!=-1)
        {
            drebusq[cont2]=i;
            cont2++;
        }
    }
    if(cont2==(cont+1))
    {
        printf("La palabra no está\n");
    }
    else
    {
        printf("La palabra está en las posiciones:");
        for(i=0;i<cont2;i++)
        {
            printf(" %d", drebusq[i]+1);
        }
        printf("\n");
    }
    fclose(f1);
    return 0;
}