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) {
    // Implement using function pointer array
    void(*fun_seq1[4])(void)={state_init,state_load,state_execute,state_exit};
   // void(*fun_seq3[3])()={state_exit,state_init,state_load};
   for(int i=0;i<3;i++){
     int j=(start+i)%4;
    fun_seq1[j]();
    printf("\n");

   }

}

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

Solving Approach

the logic was to count 3 times and access the array elements in cyclic manner which was achieved by (start+i)%4; the syntax needs to be carefully written 

 

 

 

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Input

0

Expected Output

Init Load Execute