Передача файлов через параметры функции main

#include "stdafx.h"
#include "stdio.h"
#include "iostream"
#include "string.h"
 
void crypt(char n1[], char n2[])
{
int pos=0, lkey; 
int c_key, c; 
 
char key[]="ridersof0the3storm";
FILE *f1, *f2;
if((f1=fopen(n1,"rb"))==NULL) printf("Open error %s \n",n1);
else
 {
     if((f2=fopen(n2,"wb"))==NULL) printf("Error creating file %s",n2);
     else
     {
         lkey=strlen(key);
         while (!feof(f1))
         {c=getc(f1);
         if(pos==lkey)pos=0;
         c_key=key[pos];
         c^=c_key; pos++;
         putc(c,f2);
         }
       fclose(f2);
     }
     fclose (f1);
 }
 
}
 
void compare (char s1[], char s2[])
{char c1, c2; FILE *f1, *f2;
 
if((f1=fopen(s1,"rb"))==NULL) printf("Open error %s \n",s1);
else
{if((f2=fopen(s2,"rb"))==NULL) printf("Open error %s \n",s2);
else
{while(((c1=getc(f1)) !=EOF)& ((c2=getc(f2)) !=EOF))
if (c1 != c2) break;
if (c1==c2)printf ("Files indetical\n");
else printf("Files not indectical\n");
fclose(f2);
}
fclose(f1);
}}
void _tmain(int argc, char *argv[])
{
if (argc<4) {printf("Add parameters to comand line!!! \n");
system ("Pause");}
else 
{printf("Encrypting... \n");    crypt(argv[1],argv[2]);
printf ("Decrypting... \n");crypt(argv[2],argv[3]);
printf ("Compare..\n");
system ("pause");
}}

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