State Machine Using Function Pointers

Code

#include <stdio.h>

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

void (*states[4])(void) = { state_init , state_load, state_execute, state_exit };

void run_state_sequence(int start) {
    for (int i = 0; i < 3; i++) {
        states[(start+i)%4]();
        if (i <= 2) printf("\n");
    }
    return;
}

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

Solving Approach