程序如何理解

// -------------------------------- FRAMEWORK --------------------------------------
// State Machine function prototypes
//----------------------------------------------------------------------------------
// Alpha states
void A0(void); //state A0
void B0(void); //state B0
void C0(void); //state C0
// A branch states
void A1(void); //state A1
void A2(void); //state A2
void A3(void); //state A3
void A4(void); //state A4
// B branch states
void B1(void); //state B1
void B2(void); //state B2
void B3(void); //state B3
void B4(void); //state B4
// C branch states
void C1(void); //state C1
void C2(void); //state C2
void C3(void); //state C3
void C4(void); //state C4
// Variable declarations
void (*Alpha_State_Ptr)(void); // Base States pointer
void (*A_Task_Ptr)(void);  // State pointer A branch
void (*B_Task_Ptr)(void);  // State pointer B branch
void (*C_Task_Ptr)(void);  // State pointer C branch


这部分程序到底什么意思啊？请各位大神解释一下  谢谢