57. State Machine Using Function Pointers

#include <stdio.h>

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

void (* seq[4])() = {state_init, state_load, state_execute, state_exit};
void run_state_sequence(int start) {
    for (int i =0; i<3; i++){
        seq[(start+i)%4]();
    }
}

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