用C语言写一个三种阶段不同切换的状态机

好的，以下是使用C语言编写一个三种阶段不同切换的状态机的示例代码：

#include <stdio.h>
#include <stdbool.h>

enum states {STATE_1, STATE_2, STATE_3};
enum events {EVENT_1, EVENT_2, EVENT_3};

int main() {
    enum states current_state = STATE_1;

    while(true) {
        // state 1
        if(current_state == STATE_1) {
            printf("Current state: State 1\n");
            // transition to state 2 when event 1 occurs
            current_state = (get_event() == EVENT_1) ? STATE_2 : STATE_1;
        }
        // state 2
        else if(current_state == STATE_2) {
            printf("Current state: State 2\n");
            // transition to state 3 when event 2 occurs
            current_state = (get_event() == EVENT_2) ? STATE_3 : STATE_2;
        }
        // state 3
        else if(current_state == STATE_3) {
            printf("Current state: State 3\n");
            // transition back to state 1 when event 3 occurs
            current_state = (get_event() == EVENT_3) ? STATE_1 : STATE_3;
        }
    }
    return 0;
}

// function to simulate events
enum events get_event() {
    int event_number;
    printf("Enter event number (1-3): ");
    scanf("%d", &event_number);

    switch(event_number) {
        case 1:
            return EVENT_1;
        case 2:
            return EVENT_2;
        case 3:
            return EVENT_3;
        default:
            printf("Invalid event number. Please enter 1, 2 or 3.\n");
            return get_event();
    }
}

希望对你有帮助！