/**
 * Wrapper around the int type to make it implement CalculatorOperand
 * and a toString method for printing
 * @author Leo Reyzin
 *
 */
public class MyInt implements CalculatorOperand<MyInt> {

 int theInteger; // holds the value
 
 /**
  * Constructor
  * @param i this will have the value i
  */
 MyInt (int i) {
  theInteger = i;
 }
 
 /**
  * Adds addend to this
  * @param addend
  */
 public void addTo (MyInt addend) {
  theInteger += addend.theInteger;;
 }
 
 /**
  * Subtracts subtrahend from this
  * @param subtrahend
  */
 public void subtractFrom (MyInt subtrahend) {
  theInteger -= subtrahend.theInteger;
 };
 
 /**
  * Multiplies this by multiplicand
  * @param multiplicand
  */
 public void multiplyBy (MyInt multiplicand) {
  theInteger *= multiplicand.theInteger; 
 }

 /**
  * @return Decimal representation of the value stored in this
  */
 public String toString() {return theInteger + "";}
}