- int x; /* Quadrant location of planet */\r
- int y;\r
- int pclass; /* class M, N, or O (1, 2, or 3) */\r
- int crystals; /* has crystals */\r
- int known; /* =1 contents known, =2 shuttle on this planet */\r
+ int x; /* Quadrant location of planet */\r
+ int y;\r
+ enum {M=0, N=1, O=2} pclass;\r
+ int crystals; /* has crystals */\r
+ enum {unknown, known, shuttle_down} known;\r