Question

/*Design and code a class Calculator that has the following 
 * tow integer member variables, num1 and num2.
 * - a method to display the sum of the two integers
 * - a method to display the product
 * - a method to display the difference 
 * - a method to display the quotient 
 * - a method to display the modulo (num1%num2)
 * - a method toString() to return num1 and num2 in a string  
 * - Test your class in a separate class Tester. 

#Java Programming

Answer 1

class Calculator
{
public int num1,num2;
   public Calculator(int num1,int num2)
   {
       this.num1=num1;
       this.num2=num2;
   }
public void displaySum()
{
System.out.println("Sum of "+num1+" and "+num2+" = "+(num1+num2));
}
public void displayProduct()
{
System.out.println("Product of "+num1+" and "+num2+" = "+(num1*num2));
}
public void displayDifference()
{
System.out.println("Difference of "+num1+" and "+num2+" = "+(num1-num2));
}
public void displayQuotient()
{
if(num2==0)
System.out.println("Denominator canot be zero");
else
System.out.println("Quotient of "+num1+" / "+num2+" = "+(num1/num2));
}
public void displayModulo()
{
if(num2==0)
System.out.println("Denominator canot be zero");
else
System.out.println("Modulo of "+num1+" and "+num2+" = "+(num1%num2));
}
public String toString()
{
return "Number1 = "+num1+" Number2 = "+num2;
}
}
public class Tester
{
   public static void main(String[] args)
   {
       Calculator c1 = new Calculator(5,2);
       System.out.println(c1.toString());
       c1.displaySum();
       c1.displayProduct();
       c1.displayDifference();
       c1.displayQuotient();
       c1.displayModulo();
       Calculator c2 = new Calculator(2,3);
       System.out.println(c2.toString());
       c2.displaySum();
       c2.displayProduct();
       c2.displayDifference();
       c2.displayQuotient();
       c2.displayModulo();
       Calculator c3 = new Calculator(5,0);
       System.out.println(c3.toString());
       c3.displaySum();
       c3.displayProduct();
       c3.displayDifference();
       c3.displayQuotient();
       c3.displayModulo();
   }
}