# Untitled

Help me with this
unknown
java
2 years ago
5.4 kB
6
Indexable
Never
```import java.util.*;
import PJ1.*;

class PJ1_Test
{
static private Scanner scanner;

System.out.print( "\nTry to read a fraction x/y, please enter x y : " );
int numerator = scanner.nextInt();
int denominator = scanner.nextInt();
Fraction f = new Fraction(numerator, denominator);
return f;
}

private static void printOperations() {
System.out.println("==============================================");
System.out.println("\nOperations:");
System.out.println("  0) exit \n  1) add \t2) subtract \t3) multiply \t4) divide\t5) compareTo");
System.out.println("  6) equals \t7) simplify \t8) toDouble \t9) setFraction ");
System.out.print( "\nEnter an operation number: ");
}

public static void main( String args[] )
{
scanner = new Scanner( System.in ); // scanner for input
boolean continueLoop = true; // determines if more input is needed
Fraction n1=null;
Fraction n2=null;
int op,x,y;

do
{
try // read two numbers and calculate quotient
{
printOperations();
op= scanner.nextInt();

if (op == 0) {
break;
} else if ((op >0) && (op <7)) {
} else if ((op >= 7) && (op <= 8)) {
} else if (op ==  9) {
n1 = new Fraction();
} else {
System.out.print( "\nInvalid input... try again\n" );
continue;
}

System.out.println("\nTests:\n");
switch (op) {
case 1:
System.out.println("\t" + n1 + " + " + n1 + " = " + n1.add(n1));
System.out.println("\t" + n2 + " + " + n2 + " = " + n2.add(n2));
System.out.println("\t" + n1 + " + " + n2 + " = " + n1.add(n2));
System.out.println("\t" + n2 + " + " + n1 + " = " + n2.add(n1));
break;
case 2:
System.out.println("\t" + n1 + " - " + n1 + " = " + n1.subtract(n1));
System.out.println("\t" + n2 + " - " + n2 + " = " + n2.subtract(n2));
System.out.println("\t" + n1 + " - " + n2 + " = " + n1.subtract(n2));
System.out.println("\t" + n2 + " - " + n1 + " = " + n2.subtract(n1));
break;
case 3:
System.out.println("\t" + n1 + " * " + n1 + " = " + n1.multiply(n1));
System.out.println("\t" + n2 + " * " + n2 + " = " + n2.multiply(n2));
System.out.println("\t" + n1 + " * " + n2 + " = " + n1.multiply(n2));
System.out.println("\t" + n2 + " * " + n1 + " = " + n2.multiply(n1));
break;
case 4:
System.out.println("\t" + n1 + " / " + n1 + " = " + n1.divide(n1));
System.out.println("\t" + n2 + " / " + n2 + " = " + n2.divide(n2));
System.out.println("\t" + n1 + " / " + n2 + " = " + n1.divide(n2));
System.out.println("\t" + n2 + " / " + n1 + " = " + n2.divide(n1));
break;
case 5:
System.out.println("\t" + n1 + " ct " + n1 + " = " + n1.compareTo(n1));
System.out.println("\t" + n2 + " ct " + n2 + " = " + n2.compareTo(n2));
System.out.println("\t" + n1 + " ct " + n2 + " = " + n1.compareTo(n2));
System.out.println("\t" + n2 + " ct " + n1 + " = " + n2.compareTo(n1));
break;
case 6:
System.out.println("\t" + n1 + " eq "+ n1 + " = " + n1.equals(n1));
System.out.println("\t" + n2 + " eq "+ n2 + " = " + n2.equals(n2));
System.out.println("\t" + n1 + " eq "+ n2 + " = " + n1.equals(n2));
System.out.println("\t" + n2 + " eq "+ n1 + " = " + n2.equals(n1));
break;

case 7:
System.out.print("\t" + n1 + " simplify= ");
System.out.println(n1.simplify());
break;
case 8:
System.out.println("\t" + n1 + " toDouble = " + n1.toDouble());
break;
case 9:
System.out.print( "read a fraction x/y, please enter x y : " );
x = scanner.nextInt();
y = scanner.nextInt();
System.out.print("\t" + x +"/"+ y + " setFraction = ");
n1.setFraction(x,y);
System.out.println(n1);
break;
}

} // end try
catch ( FractionException fracitonException )
{
System.err.printf( "\nFraction Exception: %s\n", fracitonException );
} // end catch
} while ( continueLoop ); // end do...while
} // end main
} // end class

```