This exercise implements various methods to compare amounts of money in euros and cents.
My Code
Main
public class Main {
public static void main(String[] args) {
// Test your code here!
Money a = new Money(10, 0);
Money b = new Money(3, 50);
Money c = a.minus(b);
System.out.println(a); // 10.00e
System.out.println(b); // 3.50e
System.out.println(c); // 6.50e
c = c.minus(a); // NOTE: new Money-object is created and reference to that is assigned to variable c
// the Money object 6.50e that variable c used to hold, is not referenced anymore
System.out.println(a); // 10.00e
System.out.println(b); // 3.50e
System.out.println(c); // 0.00e
}
}Money
public class Money {
private final int euros;
private final int cents;
public Money(int euros, int cents) {
if (cents > 99) {
euros += cents / 100;
cents %= 100;
}
this.euros = euros;
this.cents = cents;
}
public int euros() {
return euros;
}
public int cents() {
return cents;
}
public Money plus(Money added) {
Money result = new Money(this.euros + added.euros, this.cents + added.cents);
return result;
}
public boolean less(Money compared) {
int first = this.cents + (this.euros * 100);
int second = compared.cents + (compared.euros * 100);
return first < second;
}
public Money minus(Money decremented) {
Money result = new Money(0, 0);
int first = this.cents + (this.euros * 100);
int second = decremented.cents + (decremented.euros * 100);
if ((first - second) > 0 ){
result = new Money(0, first - second);
}
return result;
}
@Override
public String toString() {
String zero = "";
if (cents < 10) {
zero = "0";
}
return euros + "." + zero + cents + "e";
}
}
Model Code
Main
public class Main {
public static void main(String[] args) {
// Test your code here!
Money a = new Money(10, 0);
Money b = new Money(3, 50);
Money c = a.minus(b);
System.out.println(a); // 10.00e
System.out.println(b); // 3.50e
System.out.println(c); // 6.50e
c = c.minus(a); // NOTE: new Money-object is created and reference to that is assigned to variable c
// the Money object 6.50e that variable c used to hold, is not referenced anymore
System.out.println(a); // 10.00e
System.out.println(b); // 3.50e
System.out.println(c); // 0.00e
}
}Money
public class Money {
private final int euros;
private final int cents;
public Money(int euros, int cents) {
if (cents > 99) {
euros += cents / 100;
cents %= 100;
}
this.euros = euros;
this.cents = cents;
}
public int euros() {
return euros;
}
public int cents() {
return cents;
}
@Override
public String toString() {
String zero = "";
if (cents < 10) {
zero = "0";
}
return euros + "." + zero + cents + "e";
}
public Money plus(Money added) {
int euroSum = euros + added.euros();
int centSum = cents + added.cents();
if (centSum > 99) {
centSum -= 100;
euroSum++;
}
return new Money(euroSum, centSum);
}
public boolean less(Money compared) {
return (100 * euros + cents) < (100 * compared.euros() + compared.cents());
}
public Money minus(Money decremented) {
int euroDifference = euros - decremented.euros();
int centDifference = cents - decremented.cents();
if (centDifference < 0) {
centDifference += 100;
euroDifference--;
}
if (euroDifference < 0) {
return new Money(0, 0);
}
return new Money(euroDifference, centDifference);
}
}Comments
Although it looks like there is a lot of difference at first glance. In fact there wasn’t so much once I started going through it. I probably should have created a new method to calculate the euros and cents back into cents for comparison though as I copied and pasted that.