Code:
#define key_one (1<<0) //1
#define key_two (1<<1) //2
#define key_three (1<<2) //3
#define key_four (1<<3) //4
#define key_five (1<<4) //5
#define key_six (1<<5) //6
#define key_seven (1<<6) //7
#define key_eight (1<<7) //8
#define key_nine (1<<8) //9
#define key_zero (1<<9) //0
Use those defines for your menu's to make reading it a lot easier
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