#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#define XOR_BYTE 0xAA
#define JOB_CRYPT 1
#define JOB_DECRYPT 2
int xorFile(char *infile, char *outfile) {
  char ch;
  FILE *source = fopen(infile, "rb");
  if(source==NULL) {
    fprintf(stderr,"Enter valid file\n");
    fclose(source);
    exit(EXIT_FAILURE);
  }
  FILE *target = fopen(outfile,"wb");
  if(target==NULL) {
  }
  while((ch=fgetc(source))!=EOF)
  {
    ch ^= XOR_BYTE;
    fputc(ch,target);
  }
  fclose(target);
  fclose(source);
  return 0;
}
int main(int argc, char *argv[]) {
  xorFile(argv[1],argv[2]);
}