Rational Numbers Implementation in Java

CODE:

import java.io.*;

import java.util.*;

public class rat

{

/*

*members Numerator,Denominator

*/

int numerator;

int denominator;

/*

*Constructor

*/

public rat(int a,int b)

{

numerator=a;

denominator=b;

}

/*

*Additon method

*@param two rational numbers

*@return sum

*/

public void add(rat a,rat b)

{

if(a.denominator==b.denominator)

{

numerator=a.numerator+b.numerator;

denominator=a.denominator;

}

else

{

numerator=((a.numerator*b.denominator)+(b.numerator*a.denominator));

denominator=(a.denominator*b.denominator);

}

}

/*

*Subtraction method

*@param two rational numbers

*@return difference

*/

public void sub(rat a,rat b)

{

if(a.denominator==b.denominator)

{

numerator=a.numerator-b.numerator;

denominator=a.denominator;

}

else

{

numerator=((a.numerator*b.denominator)-(b.numerator*a.denominator));

denominator=(a.denominator*b.denominator);

}

}

/*

*Multiplication method

*@param two rational numbers

*@return multiple

*/

public void mul(rat a,rat b)

{

numerator=a.numerator*b.numerator;

denominator=a.denominator*b.denominator;

}

/*

*Division method

*@param two rational numbers

*@return quotient

*/

public void div(rat a,rat b)

{

int temp;

temp=b.denominator;

b.denominator=b.numerator;

b.numerator=temp;

numerator=a.numerator*b.numerator;

denominator=a.denominator*b.denominator;

}

/*

*Simplification method

*@param one rational numbers

*@return simplified sum

*/

public void simplify()

{

for(int i=1;i<=10;i++)

if((numerator%i==0)&&(denominator%i==0))

{

numerator/=i;

denominator/=i;

}

}

}

/*

*Main class

*/

class rational

{

/*

*Main function

*@param nothing

*@return nothing :P

*/

public static void main(String args[])

{

Scanner s=new Scanner(System.in);

System.out.println("enter the first rational number");

int n=s.nextInt();

int d=s.nextInt();

rat r1=new rat(n,d);

System.out.println("enter the second rational number");

int n1=s.nextInt();

int d1=s.nextInt();

rat r2=new rat(n1,d1);

rat r3=new rat(0,0);

int ch;

do

{

/*

*shows menu

*/ System.out.println("Enter the choice \n1.addition \n2.subtraction \n3.Multiplication \n4.division\n5.exit");

ch=s.nextInt();

switch(ch)

{

case 1:

r3.add(r1,r2);

r3.simplify();

System.out.println("additon result is"+r3.numerator+"/"+r3.denominator);

break;

case 2:

r3.sub(r1,r2);

r3.simplify();

System.out.println("subtraction result is"+r3.numerator+"/"+r3.denominator);

break;

case 3:

r3.mul(r1,r2);

r3.simplify();

System.out.println("multiplication result is"+r3.numerator+"/"+r3.denominator);

break;

case 4:

r3.div(r1,r2);

r3.simplify();

System.out.println("divison result is"+r3.numerator+"/"+r3.denominator);

break;

case 5:

System.exit(0);

break;

}

}while(ch!=6);

}

}

Input & Output:

Enter n and d of rational number 1: 2

4

Enter n and d of rational number 1: 2

4

Enter choice 1.Add 2.Subtract 3.Multiply 4.Divide 5.Exit: 1

Sum : 1

Enter choice 1.Add 2.Subtract 3.Multiply 4.Divide 5.Exit: 2

Diff: 0

Enter choice 1.Add 2.Subtract 3.Multiply 4.Divide 5.Exit: 3

Prod: ¼

Enter choice 1.Add 2.Subtract 3.Multiply 4.Divide 5.Exit: 4

Quo: 1

Enter choice 1.Add 2.Subtract 3.Multiply 4.Divide 5.Exit: 5