Maximum PC

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

static char *prog;

int main(int argc, char *argv[])
{
   printf("Welcome to the Word Length program\n");

   prog=argv[0];
   char *inpFile=argv[1];
printf("1");
   FILE *inStream=stdin;

   if (strcmp(inpFile,"-")!=0)
   {
      if ((inStream=fopen(inpFile,"r"))==NULL)
   {
      fprintf(stderr,"%s: <input>\n",prog);
      exit(1);
   }
   }
printf("2");

   char *word; //I believe my problem is here
   int n=0;
   while(scanf("%s",word)!=EOF)//and here
   {
printf("2.5");
      word=strtok(word," .,;:!()/#");
printf("3");
   n=sizeof(word);
   printf("The word %s has size %d \n",word,n);
   free(word);
   }
printf("4");

   fclose(inStream);
   return 0;
}