Using C++ Commands

Add the public functions turnLeft, turnRight, and moveForward. The functions should update the robot's x, y, and heading attributes and should not return anything. turnLeft and turnRight should update the robot's heading. If the robot's heading is 'N', turnLeft should result in the new heading being 'W moveForward should update the robot's x or y position by 1. If the robot's heading is 'N', moveForward should result in the y position increasing by one. If the robot's heading is 'S, moveForward should result in the y position decreasing by one