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

copy(FILE * fin,FILE * fout)
{  int ch;
   ch = getc(fin);
   while(ch!=EOF)
   {  putc(ch,fout);
      ch = getc(fin);
   }
}

main(int argc,char ** argv)
{  FILE * fin, * fout;

   if(argc!=3)
   {  printf("copy: wrong number of arguments\n");
      exit(0);
   }
   fin = fopen(argv[1],"r");
   if(fin==NULL)
   {  printf("copy: can't open %s\n",argv[1]);
      exit(0);
   }
   fout = fopen(argv[2],"w");
   if(fout==NULL)
   {  printf("copy: can't open %s\n",argv[2]);
      exit(0);
   }
   copy(fin,fout);
   fclose(fin);
   fclose(fout);
}