Question

iii. Write a public instance method moveBy() whose first argument is an int representing the distance to move and whose second argument is a char representing the direction in which to move. It should return no value. Cable 1: Directions and corresponding x and y ncrements direction xInc Inc right 'R' 1 left 'L' up 'U down D' Begin by declaring local int variables xInc and yInc and use the table above to set these for the appropriate increments depending on the supplied argument for direction. The method should then move the StickFigure the required distance and direction 1 step at a time, using a loop.

Answer 1

As the question seems to be subpart of bigger Question, Assumption:

• Language Java
• StickFigure is represented by s
• StickFigure s will have render method
• StickFigure have x and y attribute corresponding to its position
• Code is illustrative as it has comments inline.

// moveBy method starts

public static void moveBy(int distance, char direction){
   int xInc = 0;
   int yInc = 0;

// Updating local variable xInc and yInc depending on direction and distance.   

if(direction=='R'){
       xInc = 1*distance;
   }
   else if(direction=='L'){
       xInc = -1*distance;
   }
   else if(direction=='U'){
       yInc = 1*distance;
   }
   else if(direction=='D'){
       yInc = -1*distance;
   }
   //Move stick figure x distance
   if(direction=='R' || direction=='L' ){
       for(int i=0 i<distance;i++){ // loop 1 step each time
           s.x+=(xInc/distance);
           //render s
       }
   }
   //Move stick figure y distance
   if(direction=='U' || direction=='D' ){
       for(int i=0 i<distance;i++){ // loop 1 step each time
           s.y+=(yInc/distance);
           //render s
       }
   }    

}

// moveBy method ends