状态机[C语言]

#include <stdio.h>

// 定义状态枚举
typedef enum {
    STATE_A,
    STATE_B,
    STATE_C
} State;

// 定义状态结构体，包含状态名称和切换状态的函数指针
typedef struct {
    State state;
    void (*switchState)(State*);
} StateMachine;

// 状态切换函数
void switchToB(State* state) {
    printf("Switching to State B\n");
    state->state = STATE_B;
}

void switchToC(State* state) {
    printf("Switching to State C\n");
    state->state = STATE_C;
}

void switchToA(State* state) {
    printf("Switching to State A\n");
    state->state = STATE_A;
}

// 初始化状态机
void initStateMachine(StateMachine* sm, State initialState) {
    sm->state = initialState;
    switch (initialState) {
        case STATE_A:
            sm->switchState = switchToB;
            break;
        case STATE_B:
            sm->switchState = switchToC;
            break;
        case STATE_C:
            sm->switchState = switchToA;
            break;
    }
}

// 状态机切换状态
void stateMachineSwitch(StateMachine* sm) {
    sm->switchState(&sm->state);
}

int main() {
    StateMachine sm;
    initStateMachine(&sm, STATE_A); // 初始状态为A

    // 模拟状态切换
    stateMachineSwitch(&sm); // 切换到B
    stateMachineSwitch(&sm); // 切换到C
    stateMachineSwitch(&sm); // 切换回A
    stateMachineSwitch(&sm); // 再次切换到B

    return 0;
}