File I/O editing problems

(It's a homework assignment, so for the sake of education you probably shouldn't hand me a straight answer...or at least not all of it )

Anyway, supposed to open a text file and change user-defined words to *BLEEP*, then writing it to a new file. Supposed to get the list of words to 'censor' from command-line arguments and store them in a string array.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAXLEN 1000

int main(int argc, char *argv[])
{


  char buffer[MAXLEN];
  char newbuffer[MAXLEN];
  char *address;

  FILE *in = fopen("bleepIn.txt","r");
  FILE *out = fopen("bleepOut.txt","w");

  if(in == NULL)
    {
      fprintf(stderr,"ERROR");
      exit(-1);
    }

  while(fgets (buffer,MAXLEN,in) != NULL)
    {
      if(strcmp(*argv,buffer) == 0) 
        {
          address = strstr(*argv,buffer);
          printf("%s",address);            //never runs
          strncpy(address,"*BLEEP*",10);
          strncpy(newbuffer,buffer,100);
          fputs(newbuffer,out);
        }
      else
        {
          strncpy(newbuffer,buffer,100);
          fputs(newbuffer,out);
        }
    }

  fclose(in);
  fclose(out);

  return 0;
}

my printf statement in the while loop never prints anything, so i'm guessing there's an error with the evaluation but i'm not sure what it is...can anyone enlighten me?

Read up on argv - Try and find some examples on how people are using it.