/*****************************************************************************

This is a snippet of sample code for implementing Mastermind. 

Please compile it with: gcc -o mastermind mastermind.c
To execute the program, for example: ./mastermind YYGP, then type 'Enter'.

For gathering a guessed code from user input, you might need to use
standard C I/O functions (e.g., scanf()).

******************************************************************************/

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

// the 4-peg code chosen by the codemaker
char hidden_code[4];

// Your other global variables here.  Use global variables sparingly.




/**** Function declarations ****/

/* Given: A pointer to a character array
   Effects: Sets the character array 'hidden_code' to the characters
            from array_ptr
   Returns: 0 if successful, -1 otherwise
*/
int SetHiddenCode (char *array_ptr);

/* Given: A pointer to a character array
   Effects: None
   Returns: 0 if the character array 'array_ptr' contains a valid
            Mastermind 4-peg code.  Otherwise returns -1.
*/
int ValidateCode (char *array_ptr);

/* Given: A pointer to a character array containing a valid 4-peg code
   Effects: Print the code to the screen
*/
inline void PrintCode(char *array_ptr);

// Your other function declarations here





int main(int argc, char **argv)
{
  int i;
  char *array_ptr;

  // Set the codemaker's hidden code using the first argument to the executable
  if (argc != 2) {
    printf ("%s: Invalid number of arguments %d\n", argv[0], argc);
    exit (1);
  } else {
    if (SetHiddenCode(argv[1]) < 0) {
      printf ("%s: SetHiddenCode failed\n", argv[0]);
      exit (1);
    }      
  }

  // Sanity check
  PrintCode(hidden_code);

  return 0;
}



/**** Function definitions ****/

int SetHiddenCode (char *array_ptr) {

  if (ValidateCode (array_ptr) < 0) {
    printf ("SetHiddenCode: Invalid array_ptr\n");
    return -1;
  }

  int i;
  for (i = 0; i < 4; i++)
    hidden_code[i] = array_ptr[i];

  return 0;
}

int ValidateCode (char *array_ptr) {
  if (strlen (array_ptr) != 4) {
      printf ("Invalid number of characters in code.\n");
      return -1;
  }

  // Further validation is necessary
  // Your code here

  return 0;
}

inline void PrintCode(char *array_ptr)
{
  printf("%s\n", array_ptr);
}

// Your other function definitions here