evan-robot.c

#include <stdio.h>
#include <stdlib.h>

// this enumeration should dictate
// the main state of your robot,
// however, you may need to store
// additional state info, so
// use the struct below for that purpose
typedef enum { STATE1, STATE2 } RobotStateEnum;

// Store info that may
// need to be passed between states here
typedef struct {
  RobotStateEnum stateEnum;
} RobotState;

void state1Handler(RobotState *state) {}

void state2Handler(RobotState *state) {}

void startStateMachine(RobotState *state) {
  // continuously map the state enum
  // to a handler function, and pass
  // it the struct we use to store other state info
  while (true) {
    switch (state->stateEnum) {
    case STATE1:
      state1Handler(state);
      break;

    case STATE2:
      state2Handler(state);
      break;
    }
  }
}

int main() {
  // set the initial state
  RobotState state = {.stateEnum = STATE1}
  // pass a pointer to the initial state
  startStateMachine(&state);
}