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


void run_state_sequence(int start) {
    // Implement using function pointer array
    int idx;
    for(int i = start; i < (3 + start); i++ )
    {
        if(i > 3)
        {
            idx = i-4;
        }
        else
        {
           idx = i;
        }
        fn_ptr_arr[idx]();
        printf("\n");
    }

}

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