extra character when writing file

Hi There,

I'm trying to read a file character by character.  When I write the
file out, there is one extra character which shows on the screen as a
solid circle with a small question mark in the middle.

Here is what I have:

	infile = fopen("encrypted.txt", "r");
	outfile = fopen("plain.txt", "w");

	while(!feof(infile)) {
		ch = fgetc(infile);
		fputc(ch, outfile);
	}

        fclose(infile);
        fclose(outfile);

Can someone please tell me why this character is getting added to the
outfile?