State Machine Using Function Pointers

#include <stdio.h>
#define el printf("\n")
void state_init()    { printf("Init"); }
void state_load()    { printf("Load"); }
void state_execute() { printf("Execute"); }
void state_exit()    { printf("Exit"); }

// Your logic here
void run_state_sequence(int start) {
    // int reval = 0;
    void (*ptr[4])() = {state_init, state_load, state_execute, state_exit};
    if(start == 0) ptr[0](),el, ptr[1](), el, ptr[2]();
    if(start == 1) ptr[1](),el, ptr[2](), el, ptr[3]();
    if(start == 2) ptr[2](),el, ptr[3](), el, ptr[0]();
    if(start == 3) ptr[3](),el, ptr[0](), el, ptr[1]();
    }

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