57. State Machine Using Function Pointers

#include <stdio.h>

void state_init()    { printf("Init"); }
void state_load()    { printf("Load"); }
void state_execute() { printf("Execute"); }
void state_exit()    { printf("Exit"); }

void (*status[])() = {state_init, state_load, state_execute, state_exit};
void run_state_sequence(int start) {
    status[start](); printf("\n");
    status[(start + 1) % 4](); printf("\n");
    status[(start + 2) % 4](); printf("\n");
}

int main() {
    int start;
    scanf("%d", &start);
    run_state_sequence(start);
    return 0;
}