Assignment 107

Code

    import java.util.Scanner;
    public class Calc
    {
        public static void main(String[] args)
        {
            Scanner keyboard = new Scanner(System.in);
    
    		double a, b, c;
    		String op;
    
    		do
    		{
    			System.out.print("> ");
    			a  = keyboard.nextDouble();
    			op = keyboard.next();
    			b  = keyboard.nextDouble();
    
    			
                if ( op.equals("+") )
    				System.out.println(Add(a,b));
    			else if (op.equals("-"))
                    System.out.println(Sub(a,b));
                else if (op.equals("*"))
                    System.out.println(Mul(a,b));
                else if (op.equals("/"))
                    System.out.println(Div(a,b));
                else 
    			{
    				System.out.println("Undefined operator: '" + op + "'.");
    				
    			}
    
    			
    
    		} while ( a != 0 );
            
            }
            
            public static Double Add(Double c, Double d)
            {
                Double e = c + d;
                return e;
            }
            public static Double Sub(Double c, Double d)
            {
                Double e = c - d;
                return e;
            }
            public static Double Mul(Double c, Double d)
            {
                Double e = c*d;
                return e;
            }
            public static Double Div(Double c, Double d)
            {
                Double e = c/d;
                return e;
            }
        }
    

Picture of the output