//This Fish class demonstrates taking another Fish as an argument, as well as writing
//multiple methods to solve a problem

class Fish {
  int weight;
  Fish( int weight ) {
   this.weight = weight;
  }

  //new Fish(5).weightDifference( new Fish(6) ) == -1 
  //new Fish(5).weightDifference( new Fish(2) ) == 3
  //What is the difference between this Fish's weight and your Fish
  //Note: With this problem, we try to find how much bigger this Fish is than your Fish
  int weightDifference( Fish yourFish ) {
    //... this.weight ... yourFish ...
    return yourFish.howMuchSmaller( this.weight ); 
 //When we reached the body step, we realized that there were no methods on Fish that 
 //took a number and returned the amount that the Fish's weight was smaller than the given
 //number. We therefore wished we had such a method, and so put it on a Wishlist
 //To put a number on a wishlist requires doing the purpose and header for that method, and
 //then coming back to it after finishing the body of the method that uses the wished for method
  
  }

  //Wished For method
  //To get the difference between this Fish's weight and a givenWeight
  int howMuchSmaller( int givenWeight ) {
    // ... this.weight ... givenWeight ...
    return givenWeight - this.weight;
  }
  //Examples (examples may be above or below a method, depending on your preference)
  //new Fish(3).howMuchSmaller( 5 ) == 2
  //new Fish(5).howMuchSmaller( 1 ) == -4
 
}