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 run_state_sequence(int start) {
    void (*fp[])() = {state_init, state_load, state_execute, state_exit};

    if(start > 4 || start < 0){
        return;
    }
    else{
        int count = 3;

        while(count){
            fp[start]();
            printf("\n");
            
            if(start == 3){
                start = 0;
            }
            else{
                start++;
            }

            count--;
        }
    }
}

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

Solving Approach