Function Overloading - ICSE BOARD QUESTION 2009

/**

 * Design a class to overload a function num_calc() as follows:

 *

 * void num_calc(int num, char ch) with one integer argument and one char

 * argument, computes the square of integer argument if choice ch is 's'

 * otherwise find its cube.

 *

 * void num_calc(int a, int b, char ch) with two integer arguments and

 * character argument. It computes the product of integer arguments if ch

 * is 'p' else adds the integers.

 *

 * void num_calc(String s1, String s2) with two string arguments, which

 * prints whether the strings are equal or not

 *

 */

public class questionSEVEN2009
{
   public void num_calc(int num, char ch)
   {
       if(ch=='s')
       {
           int square=num*num;
           System.out.println("The square of the number is = "+ square);
        }
        else
        {
            int cube=num*num*num;
            System.out.println("The cube of the number is =  "+ cube);
        }
    }
    public void num_calc(int a, int b, char ch)
   {
       if(ch=='p')
       {
           int product=a*b;
           System.out.println("The product of the two numbers is = "+ product);
        }
        else
        {
            int sum=a+b;
            System.out.println("The sum of the two number is = "+ sum);
        }
    }
    public void num_calc(String s1, String s2)
   {
       if(s1.equals(s2))
       {
           System.out.println("The two strings are equal");
        }
        else
        {
          System.out.println("The two strings are not equal"); 
        }
    }
}