State Machine Using Function Pointers

Code

#include <stdio.h>

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

// Your logic here
void run_state_sequence(int start) {
    // Implement using function pointer array
    void (* sequence[])() = {state_init, state_load, state_execute, state_exit};
    sequence[start]();
    start = (start +1) % 4;
    sequence[start]();
    start = (start +1) % 4;
    sequence[start]();
}

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

Solving Approach

Construct an array of the state functions.

since it is only three states to execute, no need for a loop. 

use a modulo operation to see what's next.