A solution to Problem D (5 point)

Good things

The use of assert(). This is the greatest command you can ever use. Use it lots. It will become your friend. :-)

Simple structures are great. Here we make a little structure to make life a little easier.

Some C++ guns may ask why I didn't do:

		       char f_vals[]={"HDSC"};

I personally don't like going that. Documentation isn't just comments, it's easy to read code and asserts. Think of this as an assert(). If I use [MAXFACES+1] and accidently assign {"_HDSC"}, the compiler will pick up the extra value.

Not so good things

The usual...

#include < iostream.h >
#include < strstream.h >
#include < fstream.h >
#include < assert.h >

#define MAXLEN (2+1)
#define MAXFACES 4
#define MAXPLACES 13

struct Card {
  char f,p;
};

Card cards[MAXPLACES*MAXFACES];
char f_vals[MAXFACES+1]={"HDSC"};
char p_vals[MAXPLACES+1]={"23456789TJQKA"};

void main(void)
{
  int pos;

  ifstream infile("PROBLEMD.DAT", ios::in);
  assert(infile);

  pos=0;
  for(int i=0;i < MAXFACES;i++)
    for(int j=0;j < MAXPLACES;j++){
      cards[pos].f=f_vals[i];
      cards[pos].p=p_vals[j];
      pos++;
    }

  char incard[MAXLEN];
  while(infile >> incard){
    for(int loc=0; loc < pos ; loc++)
      if(cards[loc].f==incard[0] && cards[loc].p==incard[1])
	cards[loc].f=0;
  };

  for(int i=0;i < pos;i++)
    if(cards[i].f)
      cout << cards[i].f << cards[i].p << endl;
}