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"); }

// Your logic here
void run_state_sequence(int start) {
    void (*operation[4])() = {state_init, state_load, state_execute, state_exit};
    int a = start;
    do {
        operation[a]();
        printf("\n");
        a = (a+1)>=4? a-3 : a+1;   // vòng tròn 0 → 1 → 2 → 3 → 0
    } while (a != ((start-1)>=0? start - 1 : start +3));
}

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

Solving Approach