Java Problem
- From: "Gilbert Neiva" <gneiva@xxxxxxx>
- To: <programmingblind@xxxxxxxxxxxxx>
- Date: Sun, 14 Nov 2010 19:02:07 -0700
I am trying to write a program in which it adds two fractions together. I made
a fraction class which consists of the following:
public class Fraction
{
static int numerator; // Holds numerator
static int denominator; // Holds denominator
// Constructor passes int values from num and denum to numerator, and
denominator.
public Fraction(int num, int denom)
{
numerator = num;
denominator = denom;
}
// Default constructor sets data fields to 0
public Fraction()
{
numerator = 0;
denominator = 0;
}
// Methods return values of numerator and denominator
public static int getNum() { return numerator; }
public static int getDenom() { return denominator; }
// Returns printed formatted string
public static String toString()
{
return numerator "/" denominator;
}
// Adds two fractions together
public static Fraction add(Fraction frac1)
{
Fraction fraction_1 = new Fraction();
Fraction fraction_2 = new Fraction();
Fraction result = new Fraction();
fraction_1.denominator = denominator * frac1.denominator;
fraction_1.numerator = numerator * frac1.denominator;
fraction_2.denominator = frac1.denominator * denominator;
fraction_2.numerator = frac1.numerator * denominator;
result.numerator = fraction_1.numerator + fraction_2.numerator;
return result;
}
} // End of class
My driver class, the class that has the main method has the following.
import java.util.Scanner; // Import Scanner class
// Class FractionDriver inputs two fractions and adds them together
public class FractionDriver
{
// Declare data fields
static int numerator; // Holds numerator
static int denominator; // Holds denominator
static Scanner inData = new Scanner(System.in); // Scanner object
public static void main(String[] args)
{
// Declare local data fields
Fraction frac1 = new Fraction();
Fraction frac2 = new Fraction();
// Ask user for numerators and denominators.
System.out.println("Enter numerator for fraction 1:");
numerator = inData.nextInt();
System.out.println("Enter denominator for fraction 1:");
denominator = inData.nextInt();
frac1 = new Fraction(numerator, denominator);
System.out.println("Fraction 1 is " + frac1 + ".");
System.out.println("Enter numerator for fraction 2:");
numerator = inData.nextInt();
System.out.println("Enter denominator for fraction 2:");
denominator = inData.nextInt();
frac2 = new Fraction(numerator, denominator);
System.out.println("Fraction 2 is " + frac2 + ".");
System.out.println(frac1 + " + " + frac2 + " = " +
frac1.add(frac2));
}
}
When I try to compile it with J2SDK console, I get the following error.
C:\Users\user\Desktop\COMP268\Practice\Fractions\src>javac *.java
Fraction.java:28: ';' expected
return numerator "/" denominator;
^
1 error
C:\Users\user\Desktop\COMP268\Practice\Fractions\src>
The Fraction.java file is the class that defines a fraction object. I looked in
the source code for that file, and I cannot find any lines of code that need a
cemmi-colon. When I run the program with Eclipse, I get the following.
Enter numerator for fraction 1:
3
Enter denominator for fraction 1:
5
Fraction 1 is Fraction@ca0b6.
Enter numerator for fraction 2:
2
Enter denominator for fraction 2:
4
Fraction 2 is Fraction@10b30a7.
Fraction@ca0b6 + Fraction@10b30a7 = Fraction@1a758cb
Eclipse does warn me that there are errors in the application before running
it. Can someone help me with this issue? What am I doing wrong?
Gilbert Neiva
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