FIRST WEEK TERM WORK Program 5

5) Write a Java Program for the following problem scenario: Create a package named “BasicMath” which has a class named Basic and has methods to perform following computations: 

a. Addition of two numbers 

b. Subtraction of two numbers 

c. Multiplication of two numbers

d. Division of two numbers

 Create another package named “AdvancedMath” which has a class named Advanced and has methods to perform following computations: 

a. Find sine of an angle 

b. Find ab 

c. Find log10 of a number

 Create a class named TestDemo defined inside a default package. This class must invoke all the methods of Basic and Advanced classes.

Default Package(Main class):

import AdvanceMath.Advance;

import BasicMath.Basic;

public class TestDemo {

public static void main(String[] args) {

Basic obj = new Basic();

Advance obj1 = new Advance();

int a;

double d;

a = obj.add(4, 5);

System.out.println("Sum= " + a);

a = obj.sub(4, 5);

System.out.println("Sub= " + a);

a = obj.mult(4, 5);

System.out.println("mult= " + a);

a = obj.div(4, 5);

System.out.println("div= " + a);

d = obj1.sin(30);

System.out.println("Sin= " + d);

d = obj1.exppow(2, 3);

System.out.println("Pow= " + d);

d = obj1.log(10);

System.out.println("Log= " + d);

}

}

BasicMath Package:

package BasicMath;

public class Basic {

int sum;

public int add(int a, int b) {

sum = a + b;

return sum;

}

public int sub(int a, int b) {

sum = a - b;

return sum;

}

public int mult(int a, int b) {

sum = a * b;

return sum;

}

public int div(int a, int b) {

if (b == 0) {

System.out.println("Error");

return -1;

} else {

sum = a / b;

return sum;

}

}

}

AdvanceMath Package:

package AdvanceMath;

public class Advance {

public double sin(double a) {

double x = 3.14 * a / 180;

// convert x to an angle between -2 PI and 2 PI

x = x % (2 * 3.14);

// compute the Taylor series approximation

double term = 1.0; // ith term = x^i / i!

double sum = 0.0; // sum of first i terms in taylor series

for (int i = 1; term != 0.0; i++) {

term *= (x / i);

if (i % 4 == 1)

sum += term;

if (i % 4 == 3)

sum -= term;

}

return sum;

}

public double exppow(int a, int b) {

double sum = 1;

for (int i = 1; i <= b; i++) {

sum = sum * a;

}

return sum;

}

public double log(int x) {

double sum = Math.log10(x);

return sum;

}

}