Thread: Problem with getchar and whitespace/punctuation

I am trying to write a "censor" program that will use a "message" file and a "words" file that contains the banned words. It should replace all the banned words with the the first letter followed by asterisks to indicate the word's length. I am having trouble trying to get the punctuation and spaces seperate from the words. here's what I've got:

Code:

#include <string>
#include <fstream>
#include <vector>
#include <iomanip>
#include <sstream>
#include <iostream>
#include <iterator> 

using namespace std;

int main()
{
    char ch;
    string word="";
    ifstream messagefile("myfile.txt");
    ofstream out("outfile.txt");
    int bannedcount =0;
    std::vector<std::string> bannedfile;
    std::string line;
    bannedfile.clear();
    std::ifstream infile ("words.txt", std::ios_base::in);
    while (infile >> line)
    {
        bannedfile.push_back (line);
        bannedcount ++;
    }
    while( messagefile.get(ch) )
    {
       do
       {
           word += ch;
           messagefile.get(ch);
       }
       while ( !ispunct(ch) && !isspace(ch));
       for (int h=0; h < bannedcount ; h++)
       {
             if (word== bannedfile[h])
             {      
                   cout <<"Changing " << bannedfile[h] << endl;
                   for(int i = 1; i < bannedfile[h].length(); i++)
                   {
                          word[i] = '*';
                   } 
             }
       }
       out << word;
       word=ch;
       string spaces="";
       do
       {
           messagefile.get(ch);
           spaces =+ ch;
       }
       while ( ispunct(ch) || isspace(ch));
       out << spaces;
       spaces.clear();
}
    messagefile.close();
    out.close();
    system("del myfile.txt");
    int result;
    char oldname[] ="outfile.txt";
    char newname[] ="myfile.txt";
    result= rename( oldname , newname );
    if ( result == 0 )
       puts ( "File successfully renamed" );
    else
       perror( "Error renaming file" );
       system ("pause");
}

Anyone see the problem?