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 (*states[4])()={state_init,state_load,state_execute,state_exit};
    int total=4;
    for(int i=0;i<3;i++){
        int index = (start+i)%total;
        states[index]();
    }

}

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

Solving Approach

• Store all state functions in an array of function pointers.
• Use start as the starting index.
• Run a loop 3 times to print 3 states.
• Use (start + i) % total to wrap around when reaching the end.
• Call each state function using states[index]().